Imaging apparatus, method for controlling imaging apparatus, and storage medium

Abstract

To provide an imaging apparatus, a control method of the imaging apparatus, and a program capable of reducing the influence of the time required for biometric authentication on imaging in the imaging apparatus capable of biometric authentication.SOLUTION: An imaging apparatus 100 includes imaging means (an imaging unit 105), temporary storage means (a system memory unit 107) for temporarily storing image data, acquisition means (a biological information acquisition unit 110) for acquiring biological information of a photographer, biological authentication means (a control unit 101) for authenticating the photographer on the basis of the biological information, and control means (a control unit 101). The control unit starts image pick-up processing by the image pick-up unit and starts biometric authentication processing by the biometric authentication unit, and when the biometric authentication processing has not ended before the image pick-up processing ends, the control unit temporarily stores the image data in the temporary storage unit, and thereafter, when the biometric authentication processing ends, the control unit provides a result of the biometric authentication processing to the image data temporarily stored in the temporary storage unit.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an imaging device, a control method for an imaging device, and a program. [Background technology]

[0002] In recent years, electronic devices such as digital cameras, smartphones, and tablet devices that can capture still images, videos, and the like and record them as image files have become widespread. Users of these electronic devices can upload image files to the Internet, for example. Image files uploaded to the Internet may be illegally copied or altered by third parties. Such copying or alteration may be unacceptable to users. Therefore, measures to protect the rights of copyright holders of image files are highly desirable. To address this issue, industry groups (e.g., C2PA) have been established to develop technical standards for authenticating the origin and history of image files. Companies belonging to these groups are working to establish technologies for verifying the authenticity of image file information sources. For example, Patent Document 1 discloses an information processing system with a biometric authentication function that improves the reliability of image data (image files) storage through the biometric authentication. This information processing system is configured to permit image capture only if biometric authentication is successful. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-21127 Summary of the Invention [Problem to be solved by the invention]

[0004] However, biometric authentication generally requires approximately 300 to 500 ms, depending on the configuration and method of the biometric authentication, and therefore, in the information processing system described in Patent Document 1, imaging is not permitted while biometric authentication is being performed. For example, even if the time to capture an image comes during biometric authentication and an image capture operation is performed, imaging is not permitted, and this valuable opportunity to capture an image may be lost.

[0005] The present invention has been made in view of the above-mentioned problems, and aims to provide an imaging device capable of biometric authentication, and a control method and program for the imaging device, which can reduce the impact of the time required for biometric authentication on imaging. [Means for solving the problem]

[0006] In order to achieve the above object, the imaging device of the present invention comprises an imaging means that performs an imaging process to capture an image and generate image data, a temporary storage means that temporarily stores the image data, an acquisition means that acquires biometric information of an operator that performs an operation to instruct the imaging process, a biometric authentication means that performs a biometric authentication process to authenticate the operator based on the biometric information acquired by the acquisition means, and a control means that controls the imaging means, the temporary storage means, the acquisition means, and the biometric authentication means, respectively, and the control means starts the imaging process by the imaging means and also starts the biometric authentication process by the biometric authentication means, and if the biometric authentication process has not finished by the time the imaging process finishes, temporarily stores the image data generated by the imaging process in the temporary storage means, and if the biometric authentication process finishes after the temporary storage, assigns the result of the biometric authentication process to the image data temporarily stored in the temporary storage means. [Effects of the Invention]

[0007] According to the present invention, in an imaging device capable of biometric authentication, it is possible to reduce the influence of the time required for biometric authentication on imaging. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram illustrating an example of the configuration of an imaging device according to a first embodiment. [Figure 2] 10 is a flowchart illustrating a process executed by the imaging device. [Figure 3] FIG. 2 is a diagram illustrating an example of a screen displayed on a display unit of the imaging device. [Figure 4] 10 is a flowchart showing processing executed by the imaging device according to the second embodiment. [Figure 5] 10 is a user database stored in a memory unit of an imaging device according to a third embodiment. [Figure 6] 10 is a flowchart illustrating a process executed by the imaging device. [Figure 7] 10 is a flowchart showing processing executed by an imaging device according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Each embodiment of the present invention will be described in detail below with reference to the drawings. However, the configurations described in each of the following embodiments are merely examples, and the scope of the present invention is not limited to the configurations described in each embodiment. For example, each component constituting the present invention can be replaced with any configuration that can perform the same function. Also, any component may be added. Furthermore, any two or more configurations (features) of each embodiment can be combined.

[0010] First Embodiment A first embodiment will be described below with reference to FIGS. 1 to 3. FIG. 1 is a diagram illustrating an example of the configuration of an imaging device according to the first embodiment. FIG. 1(a) is a front perspective view showing the appearance of the imaging device. FIG. 1(b) is a rear perspective view showing the appearance of the imaging device. FIG. 1(c) is a block diagram illustrating the hardware configuration of the imaging device. In FIGS. 1(a) and 1(b), the width direction of the imaging device is defined as the X direction, the height direction of the imaging device is defined as the Y direction, and the thickness direction of the imaging device, i.e., the optical axis direction, is defined as the Z direction. The imaging device 100 shown in FIGS. 1(a) and 1(b) is a digital camera capable of capturing various types of images, such as videos and still images. The imaging device 100 has a body 1000. The imaging device 100 has a main power lever 1001, a release button 1002, a touch panel 1003, a main electronic dial 1004, and a sub electronic dial 1005, which are provided on the body 1000. The imaging device 100 also has a cross key 1006, a SET button 1007, a playback button 1008, an eyepiece detection unit 1009, a monitor 1010, a viewfinder (eyepiece finder) 1011, and a display panel 1012, which are provided on the body 1000. The imaging device 100 also has a grip unit 1020 and a terminal unit 1030, which are provided on the body 1000.

[0011] The main power lever 1001001 is an operating member for turning the imaging device 100 on and off. The release button 1002 is an operating unit for issuing shooting instructions to the imaging device 100. The touch panel 1003 can detect touch operations on the display surface (operation surface) of the monitor 1010. The main electronic dial 1004 is rotatably supported, and by rotating it, various setting values ​​such as shutter speed and aperture can be changed. The sub electronic dial 1005 is rotatably supported, and by rotating it, for example, it is possible to move a selection frame on the monitor 1010 or advance images. The cross key 1006 is supported so that the top, bottom, left, and right portions can each be pressed in the Z direction, and an operation instruction can be issued depending on the pressed portion. The SET button 1007 is mainly used to confirm selection items on the monitor 1010, for example. The playback button 1008 can switch the imaging device 100 between shooting mode and playback mode. For example, pressing the playback button 8 during shooting mode switches to playback mode. This allows an image file (captured image data) recorded on a recording medium such as a memory card to be displayed on the monitor 1010 or the finder 1011. The user can intuitively make various settings using the menu screen displayed on the monitor 1010 or the finder 1011, the cross key 1006, the SET button 1007, etc.

[0012] The eye proximity detection unit 1009 is a sensor that detects whether the eye of the photographer (user), i.e., the operator operating the imaging device 100, is close to the viewfinder 1011. The monitor 1010 can display, for example, image files and various information. The photographer places his or her eye on the viewfinder 1011 to view an image displayed on the EVF inside. The display panel 1012 can display shooting conditions (setting values), such as shutter speed and aperture. The grip unit 1020 is a holding unit shaped to be easily held in the photographer's right hand when holding the imaging device 100. When the photographer holds the imaging device 100 by gripping the grip unit 1020 with the little finger, ring finger, and middle finger of the right hand, the release button 1002 and main electronic dial 4 are located in positions that can be operated with the index finger of the right hand, and the sub electronic dial 5 is located in a position that can be operated with the thumb of the right hand. The terminal section 1030 is provided with a connector (not shown) for a wired cable that connects the imaging device 100 to an external device such as a personal computer.

[0013] As shown in FIG. 1(c), the imaging device 100 includes a control unit (control means) 101, a power supply circuit unit 102, a power supply unit 103, a display unit (display means) 104, and an imaging unit (imaging means) 105. The imaging device 100 also includes an operation unit 106, a system memory unit (temporary storage means) 107, a memory unit 108, a recording unit (main storage means) 109, and a biometric information acquisition unit (acquisition means) 110. The control unit 101 is a computer including at least one processor, and controls the power supply circuit unit 102 to the biometric information acquisition unit 110. The control unit 101 can control the entire imaging device 100 by reading a program for controlling the imaging device 100 from the memory unit 108 and loading a portion of the program into the system memory unit 107. The program includes, for example, a program for causing the control unit 101 to execute each unit and each unit (a control method for the imaging device) of the imaging device 100. The control unit 101 can also perform AE control, which controls the brightness of the captured image acquired by the imaging unit 105 through imaging processing, and AF control, which moves the lens to focus on the subject image. The power supply circuit unit 102 is configured, for example, with a battery detection circuit, a protection circuit, a DC-DC converter, and an LDO regulator (none of which are shown). The power supply circuit unit 102 thus configured converts the voltage applied from the power supply unit 103 into a desired voltage and supplies it to each electronic device built into the imaging device 100. The power supply circuit unit 102 also has a determination function for determining whether a battery is installed and the battery type. The power supply circuit unit 102 also has a protection function for protecting each electronic device by shutting off the power supply unit 103 if an abnormal state such as an overcurrent is detected. The power supply circuit unit 102 preferably has a power detection circuit capable of detecting the amount of power supplied to each unit within the imaging device 100. The power supply unit 103 is configured, for example, with a secondary battery such as a NiCd battery, a NiMH battery, or a Li battery, or an AC adapter. The power supply unit 103 has a means for acquiring the remaining battery capacity, and can notify the control unit 101 of the remaining battery capacity.

[0014] The display unit 104 is composed of a monitor 1010, a viewfinder 1011, and a display panel 1012. Under the control of the control unit 101, the display unit 104 visualizes and displays on the screen the captured image data generated by the imaging unit 105. This visualization is not particularly limited, and examples thereof include characters, images, etc. The display unit 104 is composed of, for example, a combination of an EVF, an LCD, an LED, etc. The imaging unit 105 is composed of, for example, an imaging element such as a CMOS or a CCD. A subject image is formed on the imaging unit 105 via an optical system (not shown) such as a lens. The imaging unit 105 performs imaging processing to capture an image and generates captured image data (imaging process). The captured image data acquired under the control of the control unit 101 is transmitted to the control unit 101. The captured image data is then developed by the control unit 101. The captured image data is then assigned metadata and stored in the recording unit 109 as an image file. If the captured image data is still image data, it is stored in the recording unit 109 as an image file in JPEG format, and if it is image data, it is stored in the recording unit 109 as an image file in MPEG format.

[0015] The operation unit 106 is composed of components from a main power lever 1001 to an eyepiece detection unit 1009. The operation unit 106 thus configured can input various predetermined operational instructions to the control unit 101. A release button 1002 constituting the operation unit 106 is pressed in two stages with a time lag when the photographer instructs the imaging unit 105 to perform imaging processing. The release button 1002 is composed of a first release switch (detection means), a second release switch (detection means), and a capacitance-type touch sensor (none of which are shown). Pressing the release button 1002 in the first stage switches the first release switch to an ON state, which is detected as a first operation. This ON state is output to the control unit 101 as a first operation instruction. Thereafter, pressing the release button 1002 in a second stage, which requires a greater force than the first stage, switches the second release switch to an ON state, which is detected as a second operation. This ON state is output to the control unit 101 as a second operation instruction. Furthermore, if the photographer touches the release button 1002 before pressing the release button 1002, the touch sensor reacts, and the reaction result is output to the control unit 101 as a third operation instruction. Hereinafter, the first operation instruction may be referred to as "SW1," the second operation instruction may be referred to as "SW2," and the third operation instruction may be referred to as "SW0." When the control unit 101 detects SW0, it is understood that the photographer is preparing to shoot with his finger on the release button 1002. When the control unit 101 detects SW1, it is understood that the photographer has half-pressed the release button 1002. In this state, the control unit 101 performs AF control and AE control. When the control unit 101 detects SW2, it is understood that the photographer has fully pressed the release button 1002. In this state, the control unit 101 executes image capture processing.

[0016] The main power lever 1001 constituting the operation unit 106 is switched between an ON state and an OFF state by operation by the photographer, i.e., user operation. When the main power lever 1001 is switched from the OFF state to the ON state, it outputs a camera start instruction to the control unit 101. The control unit 101 transitions the imaging device 100 to the camera start state upon receiving the camera start instruction. In the camera start state, a desired voltage is applied to each of the electronic devices. The control unit 101 controls the display unit 104 to display a live view image acquired by the imaging unit 105, regardless of whether or not there is input from the operation unit 106. This allows the photographer to prepare to capture a subject while checking the live view image. Furthermore, when the main power lever 1001 is switched from the ON state to the OFF state, it outputs a camera stop instruction to the control unit 101. The control unit 101 transitions the imaging device 100 to the camera stop state upon receiving the camera stop instruction. In the camera stop state, voltage application to each of the electronic devices is cut off. In addition, in the camera-off state, the current consumption of the image capture device 100 is at its lowest.

[0017] The system memory unit 107 is configured with a RAM or the like, and stores, for example, a program read from the memory unit 108, constants and variables for the operation of the control unit 101, and the like. It also functions as a buffer memory that temporarily stores captured image data (image files) acquired by the imaging unit 105 until the captured image data is actually stored in the recording unit 109 (temporary storage process). The memory unit 108 is configured with an electrically erasable and storable non-volatile memory, a ROM, or the like. The memory unit 108 stores, for example, constants and programs for the operation of the control unit 101. Unlike the temporary storage in the system memory unit 107, the recording unit 109 actually stores the captured image data (image files). In this embodiment, the recording unit 109 may be, for example, a storage medium fixed (pre-installed) to the imaging device 100 or a storage medium detachable from the imaging device 100, but is not limited thereto. Another example of the recording unit 109 may be, for example, an external device configured separately from the imaging device 100 and located in a different position from the imaging device 100. The external device is not particularly limited, and examples thereof include a desktop or notebook personal computer, a tablet terminal, a smartphone, etc. Furthermore, when the recording unit 109 is an external device, the external device and the imaging device 100 are connected to each other so as to be able to communicate with each other via wired or wireless communication. The biometric information acquisition unit 110 acquires biometric information of the photographer (acquisition step). "Biometric information" is information that represents physical characteristics for identifying the photographer, and is used in biometric authentication processing to authenticate the photographer. The biometric information is not particularly limited, and examples thereof include fingerprint information, face information, iris information, voiceprint information, and vein pattern information.

[0018] The photographer, who is the user of the imaging device 100, stores in advance in the memory unit 108 (information storage means) a user database linking the photographer's own biometric information with a valid user name as the photographer's name. When the user takes a photograph using the imaging device 100, biometric authentication processing is performed based on the user database (biometric authentication step). This biometric authentication processing is performed by the control unit 101. In this embodiment, the control unit 101 functions as a biometric authentication unit that performs the biometric authentication processing. Note that in the imaging device 100, a section functioning as a biometric authentication unit may be provided separately from the control unit 101. In the biometric authentication processing, the biometric information acquired by the biometric information acquisition unit 110 is compared with biometric information pre-stored in the user database (memory unit 108) to determine whether the two sets of biometric information match. If it is determined that the two sets of biometric information match, the biometric authentication processing is deemed successful, i.e., the photographer is deemed to be a user with a valid user name who can use the imaging device 100. The valid user name is then stored, for example, in the memory unit 108 as authenticated user information for the current photograph. The authenticated user information is added to the image file captured in parallel with the biometric authentication process as photographer information, for example, in a photographer tag in Exif. The photographer information is identification information that can identify the photographer. On the other hand, if it is determined that the two sets of biometric information do not match (are mismatched), the biometric authentication process is deemed unsuccessful, i.e., the photographer is deemed not to be a legitimate user who can use the imaging device 100.

[0019] If fingerprint information is used as the biometric information, the biometric information acquisition unit 110 may be, for example, a fingerprint authentication sensor embedded in the release button 1002. In this case, the biometric authentication process compares the fingerprint information of the photographer who operates the release button 1002 when taking a picture with the fingerprint information stored in the user database to determine whether the two sets of fingerprint information match. If iris information is used as the biometric information, the biometric information acquisition unit 110 may be, for example, an iris authentication sensor mounted in the viewfinder 11. In this case, the biometric authentication process compares the iris information of the photographer who places his or her eye in the viewfinder 11 when taking a picture with the iris information stored in the user database to determine whether the two sets of iris information match.

[0020] Furthermore, biometric authentication processing may be performed each time a photograph is taken, such as when the release button 1002 is operated or when the eye is placed on the viewfinder 11. Alternatively, biometric authentication processing may be performed only when the imaging device 100 is started up. In a configuration in which biometric authentication processing is performed only when the imaging device 100 is started up, the following phenomenon may occur if, for example, the photographer who starts up the imaging device 100 (hereinafter referred to as the "first photographer") is different from the photographer who takes subsequent photographs (hereinafter referred to as the "second photographer"). The authenticated user information (legitimate user name) of the first photographer obtained through the biometric authentication processing at the time of starting up the imaging device 100 may be used as the photographer information of the second photographer who takes subsequent photographs. Therefore, the imaging device 100 performs biometric authentication processing each time a photograph is taken, so as to prevent such a phenomenon. This increases the reliability of the photographer information assigned to the image file. Furthermore, in order to ensure the authenticity of the image file, the imaging device 100 preferably uses a blockchain to perform user registration in the management server system, which is the recording unit 109, so that the image file can be registered in the management server. In such a configuration, first, a hash value of the image file is generated when the image is captured by the imaging device 100. Then, information related to the image file and the hash value are registered in the blockchain as image file information. This ensures the authenticity of the image file. Furthermore, registration of the image file in the management server is permitted only when authenticated user information corresponding to the results of biometric authentication processing performed simultaneously with the capture matches registered user information in the management server. This makes it possible to prevent impersonation by a third party, thereby increasing the authenticity of the image file.

[0021] FIG. 2 is a flowchart showing processing executed by the imaging device. A program based on the flowchart shown in FIG. 2 is stored in the memory unit 108. The control unit 101 loads this program into the system memory unit 107 and executes it. When the control unit 101 receives a camera startup instruction from the operation unit 106, the control unit 101 transitions the imaging device 100 to an active state. Thereafter, the program based on the flowchart shown in FIG. 2 is started. As shown in FIG. 2, in step S201, the control unit 101 prepares to display an icon 302 (see FIG. 3(a)) on the display unit 104 together with a live view image 301. In this embodiment, the icon 302 is displayed superimposed on the live view image 301. As will be described later, the icon 302 is an icon indicating the "pre-authentication (before biometric authentication processing)" state among processing status information (status) indicating the execution state of biometric authentication processing. After step S201 is executed, the process proceeds to step S202.

[0022] In step S202, the control unit 101 displays the live view video 301, on which the icon 302 prepared in step S201 is superimposed, on the display unit 104. After step S202 is executed, the process proceeds to step S203.

[0023] In step S203, the control unit 101 determines whether SW2 of the release button 1002 has been detected. If the control unit 101 determines in step S203 that SW2 has been detected, the process proceeds to step S204. On the other hand, if the control unit 101 determines in step S203 that SW2 has not been detected, the process remains in step S203 and waits.

[0024] In step S204, the control unit 101 prepares to display an icon 303 (see FIG. 3(b)) superimposed on the live view image 301 on the display unit 104. As will be described later, the icon 303 is an icon that indicates the "authenticating" state among the processing status information. Note that the live view image 301 is displayed between each still image capture in the case of continuous still image capture in which SW2 is continuously detected, i.e., in the ON state. This allows the user to understand the status of the subject and the imaging device 100 while checking the live view image 301 even during continuous still image capture. After step S204 is executed, the process proceeds to step S205.

[0025] In step S205, the control unit 101 sets the biometric authentication process counter to "1." The "biometric authentication process counter" refers to the number of times the biometric authentication process is performed in parallel with image capture. After step S205 is performed, the process proceeds to step S206.

[0026] In step S206, the control unit 101 controls the biometric information acquisition unit 110 to acquire biometric information of the photographer (user) who captures the image by operating the imaging device 100. After step S206 is executed, the process proceeds to step S207.

[0027] In step S207, the control unit 101 starts the biometric authentication process. As described above, in the biometric authentication process, the biometric information acquired by the biometric information acquisition unit 110 (step S206) is compared with the biometric information stored in the user database. Then, it is checked whether the biometric information acquired by the biometric information acquisition unit 110 matches the biometric information stored in the user database. After step S207 is executed, the process proceeds to step S208.

[0028] In step S208, the control unit 101 controls the imaging unit 105 to acquire image data in the imaging unit 105, i.e., starts imaging processing. In the imaging processing, the imaging unit 105 performs photoelectric conversion and A / D conversion processing of the subject image formed on the imaging element. Note that the imaging processing is performed without waiting for the end of the biometric authentication processing. After step S208 is executed, the processing proceeds to step S209.

[0029] In step S209, control unit 101 determines whether or not the authenticated user information has already been stored (set) in memory unit 108. If control unit 101 determines in step S209 that the authenticated user information has already been stored, the process proceeds to step S222. On the other hand, if control unit 101 determines in step S209 that the authenticated user information has not yet been stored, the process proceeds to step S210.

[0030] In step S210, the control unit 101 determines whether the biometric authentication process has ended. If the control unit 101 determines in step S210 that the biometric authentication process has ended, the process proceeds to step S211. On the other hand, if the control unit 101 determines in step S210 that the biometric authentication process has not ended, the process proceeds to step S219.

[0031] In step S211, the control unit 101 determines whether the biometric authentication process as a result of the biometric authentication process in step S210 was successful. This determination is made by comparing the biometric information acquired by the biometric information acquisition unit 110 with the biometric information stored in the user database and determining whether the two sets of biometric information match. If the two sets of biometric information match, the biometric authentication process is determined to be successful. On the other hand, if the two sets of biometric information do not match, the biometric authentication process is determined to have failed. As described above, the photographer, who is the user of the imaging device 100, stores in advance in the memory unit 108 a user database that associates the photographer's own biometric information with a legitimate user name as the photographer's name. If this user database has not been stored, the biometric authentication process is determined to have failed. If the biometric information acquisition unit 110 is a fingerprint authentication sensor embedded in the release button 1002, the biometric authentication process may also be determined to have failed if the photographer operates the release button 1002 while wearing gloves. Furthermore, depending on the position of the fingertip relative to the release button 1002, it may be difficult to accurately read a fingerprint, which may result in the biometric authentication process failing. Furthermore, if the fingertip operating the release button 1002 is dirty, the biometric authentication process may also fail. If the control unit 101 determines in step S211 that the biometric authentication process has been successful, the process proceeds to step S212. On the other hand, if the control unit 101 determines in step S211 that the biometric authentication process has been unsuccessful, the process proceeds to step S215.

[0032] In step S212, the control unit 101 determines that the photographer is a photographer who can use the imaging device 100, and stores the photographer's name, that is, a legitimate user name, as authenticated user information in the memory unit 108. After step S212 is executed, the process proceeds to step S213.

[0033] In step S213, the control unit 101 prepares to display an icon 304 (see FIG. 3(c)) on the display unit 104 by superimposing it on the live view image 301. As will be described later, the icon 304 is an icon that indicates the "authentication successful" state in the processing status information. After step S213 is executed, the processing proceeds to step S214.

[0034] In step S214, the control unit 101 gives permission to write the image file acquired (generated) in the imaging process to external media. The image file is temporarily stored in a buffer memory in the system memory unit 107, and after permission to write to external media is given, the control unit 101 assigns authenticated user information to the image file. Thereafter, the image file with the authenticated user information assigned is transferred to the recording unit 109 and permanently stored. Furthermore, when the biometric authentication process is completed, the control unit 101 similarly assigns authenticated user information to an image file acquired by imaging processing after the biometric authentication process is completed, and stores the image file in the recording unit 109. After step S214 is executed, the process proceeds to step S222.

[0035] In step S215 after step S211 is executed, the control unit 101 prepares to display an icon 305 (see FIG. 3(d)) on the display unit 104 by superimposing it on the live view image 301. As will be described later, the icon 305 is an icon that indicates the "re-authentication in progress" state in the processing status information. After step S215 is executed, the processing proceeds to step S216.

[0036] In step S216, the control unit 101 increments the counter for the number of biometric authentication processes by “+1.” After step S216 is executed, the process proceeds to step S217.

[0037] In step S217, similarly to step S206, the control unit 101 controls the biometric information acquisition unit 110 to acquire biometric information of the photographer who performs the image capture by operating the imaging device 100. After step S217 is executed, the process proceeds to step S218.

[0038] In step S218, similarly to step S207, the control unit 101 starts the biometric authentication process. After step S218 is executed, the process proceeds to step S219.

[0039] In step S219, the control unit 101 determines whether the biometric authentication process counter is equal to or less than a threshold value "Nmax." The threshold value "Nmax" is the maximum number of times the biometric authentication process is permitted to be executed in one image capture process, and is pre-programmed based on the flowchart shown in FIG. 2. If it is determined in step S211 that the biometric authentication process has failed, steps S217 and S218 are repeated until the biometric authentication process counter exceeds the threshold value "Nmax." This increases the likelihood that the biometric authentication process will ultimately succeed, even if the biometric authentication process fails until the threshold value "Nmax" is exceeded. Furthermore, the imaging device 100 preferably sets a maximum number of times the biometric authentication process can be retried. For example, if a user database linking the photographer's biometric information with a valid user name has not yet been stored in the memory unit 108, the biometric authentication process will ultimately fail, even if it is repeatedly executed. Therefore, setting a maximum number of times the biometric authentication process can be retried can prevent unnecessary repetition of the biometric authentication process. If the control unit 101 determines in step S219 that the biometric authentication process count counter is equal to or less than the threshold value "Nmax", the process proceeds to step S222. On the other hand, if the control unit 101 determines in step S219 that the biometric authentication process count counter is not equal to or less than the threshold value "Nmax", the process proceeds to step S220.

[0040] In step S220, the control unit 101 stores, as the authenticated user information, "Unknown," which indicates that the photographer is an unspecified photographer who is not registered in the user database, in the memory unit 108. After step S220 is executed, the process proceeds to step S221.

[0041] In step S221, the control unit 101 prepares to display an icon 306 (see FIG. 3(e)) on the display unit 104 by superimposing it on the live view video 301. As will be described later, the icon 306 is an icon that indicates the "authentication failed" state in the processing status information. After step S221 is executed, the processing proceeds to step S214.

[0042] In step S222, the control unit 101 determines whether the imaging process has ended. This determination is made based on the completion of the development process. If the development process has ended, it is determined that the imaging process has ended. On the other hand, if the development process has not yet ended, it is determined that the imaging process has not yet ended. Note that the determination in step S222 may also be made based on the completion of image data acquisition from the imaging unit 105. Then, if the control unit 101 determines in step S222 that the imaging process has ended, the process proceeds to step S223. On the other hand, if the control unit 101 determines in step S222 that the imaging process has not yet ended, the process returns to step S209, and the subsequent steps are executed in order.

[0043] In step S223, the control unit 101 updates the live view image 301 displayed on the display unit 104. In addition, one of the icons prepared in steps S204, S213, S215, and S221 is displayed superimposed on the live view image 301. This allows the photographer to check the subject and also the processing status information of the biometric authentication process, even during continuous still image shooting. After step S223 is executed, the process proceeds to step S224.

[0044] In step S224, the control unit 101 determines whether or not writing of image files to external media is permitted. If the control unit 101 determines in step S224 that writing of image files is permitted, the process proceeds to step S226. On the other hand, if the control unit 101 determines in step S224 that writing of image files is not permitted, the process proceeds to step S225.

[0045] In step S225, the control unit 101 temporarily stores the image file for which it is determined in step S222 that the image capture process has been completed in the buffer memory within the system memory unit 107. After step S225 is executed, the process proceeds to step S226.

[0046] In step S226, similar to step S203, the control unit 101 determines whether SW2 of the release button 1002 has been detected. If the control unit 101 determines in step S226 that SW2 has been detected, the process returns to step S208, and the subsequent steps are executed in order. On the other hand, if the control unit 101 determines in step S226 that SW2 has not been detected, the process proceeds to step S227.

[0047] In step S227, the control unit 101 determines whether or not SW1 of the release button 1002 has been detected. If the control unit 101 determines in step S227 that SW1 has been detected, the process proceeds to step S230. On the other hand, if the control unit 101 determines in step S227 that SW1 has not been detected, the process proceeds to step S228.

[0048] In step S228, the control unit 101 counts up the no-operation time. "No-operation time" refers to the time during which SW1 is not detected. When SW1 is not detected, it can be assumed that the photographer is not performing any shooting operations. After step S228 is executed, the process proceeds to step S229.

[0049] In step S229, the control unit 101 determines whether the non-operation time exceeds a threshold value, a "predetermined time T." The "predetermined time T" is set to the time during which the photographer temporarily releases his / her finger from SW1. If the release is temporary, the biometric authentication process after the release can be omitted, thereby reducing the processing load on the control unit 101 and other devices. For example, if the predetermined time T is set to a relatively long time and the first photographer and the second photographer are different, the authenticated user information of the first photographer may be used as the photographer information of the second photographer. Therefore, it is preferable to set the predetermined time T to be less than the time from the last time the first photographer inputs SW1 to the time the second photographer changes and inputs SW1 for the first time. For example, it is unlikely that the first photographer will hand over the imaging device 100 to the second photographer and input SW1 within two seconds of the first photographer's last input of SW1. In this case, the predetermined time T is set to two seconds. The predetermined time T is pre-programmed based on the flowchart shown in FIG. 2. If the control unit 101 determines in step S229 that the no-operation time has exceeded the threshold "predetermined time T", the process proceeds to step S231. On the other hand, if the control unit 101 determines in step S229 that the no-operation time has not exceeded the threshold "predetermined time T", the process returns to step S227, and the subsequent steps are executed in order.

[0050] In step S230, the control unit 101 clears the no-operation time. After step S230 is executed, the process returns to step S226, and the subsequent steps are executed in order.

[0051] In step S231, similarly to step S209, control unit 101 determines whether or not the authenticated user information has already been stored in memory unit 108. If control unit 101 determines in step S231 that the authenticated user information has already been stored, the process proceeds to step S238. On the other hand, if control unit 101 determines in step S231 that the authenticated user information has not yet been stored, the process proceeds to step S232.

[0052] In step S232, similarly to step S210, the control unit 101 determines whether the biometric authentication process has ended. If the control unit 101 determines in step S232 that the biometric authentication process has ended, the process proceeds to step S233. On the other hand, if the control unit 101 determines in step S232 that the biometric authentication process has not ended, the process remains in step S232 and waits.

[0053] In step S233, similarly to step S211, the control unit 101 determines whether the biometric authentication process was successful as a result of the biometric authentication process in step S232. If the control unit 101 determines in step S233 that the biometric authentication process was successful, the process proceeds to step S234. On the other hand, if the control unit 101 determines in step S233 that the biometric authentication process failed, the process proceeds to step S235.

[0054] In step S234, similarly to step S212, the control unit 101 determines that the photographer is a photographer who is permitted to use the imaging device 100, and stores the photographer's name, that is, a legitimate user name, as authenticated user information in the memory unit 108. After step S234 is executed, the process proceeds to step S237.

[0055] In step S235, similarly to step S220, the control unit 101 stores, as the authenticated user information, "Unknown," which indicates that the photographer is an unspecified photographer who is not registered in the user database, in the memory unit 108. After step S235 is executed, the process proceeds to step S236.

[0056] In step S236, the control unit 101 displays the authentication failure information display guidance 307 (see FIG. 3(f)) on the display unit 104, superimposed on the live view image 301. Execution of step S236 means that the biometric authentication process, which was started when SW2 was detected in step S203, has failed. Therefore, the photographer can say that the photographer information of the image file acquired by the imaging device 100 has not been assigned as intended. Then, by displaying the authentication failure information display guidance 307 on the display unit 104 in step S236, the photographer can understand that the biometric authentication process has failed. For example, if the user database storage operation has not yet been performed, the photographer can perform the user database storage operation when they view the authentication failure information display guidance 307. This makes it possible to prevent failures in the biometric authentication process due to insufficient user database storage operation. Furthermore, if the biometric information acquisition unit 110 is a fingerprint authentication sensor, and the photographer is wearing gloves and is attempting to operate the release button 1002, the photographer can remove the gloves and operate the button when he or she sees the authentication failure information display guidance 307. After step S236 is executed, the process proceeds to step S237.

[0057] In step S237, similarly to step S214, the control unit 101 officially stores the image file to which the authenticated user information has been added in the recording unit 109. After step S237 is executed, the process proceeds to step S238.

[0058] In step S238, the control unit 101 determines whether all image files temporarily stored in the buffer memory in the system memory unit 107 have been actually recorded in the recording unit 109. This determination is made based on whether the buffer memory is empty. If the buffer memory is empty, it is determined that all image files have been actually recorded in the recording unit 109. In contrast, if the buffer memory is not empty, it is determined that all image files have not been actually recorded in the recording unit 109. If the control unit 101 determines in step S238 that all image files have been actually recorded in the recording unit 109, the process proceeds to step S239. On the other hand, if the control unit 101 determines in step S238 that all image files have not been actually recorded in the recording unit 109, the process remains in standby at step S238.

[0059] In step S239, control unit 101 clears the authenticated user information stored in memory unit 108, and the process ends.

[0060] In the above control, the start of the image capture process (step S208) is executed before the end of the biometric authentication process initiated in the biometric authentication process start (step S207). Because biometric authentication generally requires, for example, approximately 300 to 500 ms, if the start of the image capture process were delayed until the end of the biometric authentication process, the start of the image capture process would be delayed by the time required for the biometric authentication process. In this case, there is a risk of missing the desired image capture timing. Therefore, by starting the image capture process before the end of the biometric authentication process, it is possible to prevent the desired image capture timing from being missed. Furthermore, if the biometric authentication process is started at the start of the image capture process and the biometric authentication process is not completed by the time the image capture process is completed, the image file generated by the image capture process is temporarily stored in the system memory unit 107 (step S225). This reduces the impact of the time required for the biometric authentication process on the image capture process, i.e., reduces the risk of the start of the image capture process being delayed and the desired image capture timing being missed. Furthermore, it is possible to prevent image files to which photographer information has not yet been assigned from being actually recorded in the recording unit 109. Then, when the biometric authentication process is completed after the image file is temporarily stored in the system memory unit 107, the image file temporarily stored in the system memory unit 107 is assigned photographer information (result of the biometric authentication process) and is then officially recorded in the recording unit 109 (step S238). This provides an image file with highly reliable photographer information, i.e., an image file operated by a legitimate photographer.

[0061] In imaging device 100, a first operation is detected by pressing release button 1002 to a first stage, and then a second operation is detected by pressing release button 1002 to a second stage, but this is not limited to this. For example, contact of release button 1002 by the photographer (SW0) may be detected as the first operation, and pressing release button 1002 by the photographer (SW1 or SW2) may be detected as the second operation.

[0062] Alternatively, the first operation may be detected by grasping the grip 120, and the second operation may be detected by pressing the release button 1002. Alternatively, the first operation may be detected by placing an eye on the viewfinder 1011, and the second operation may be detected by pressing the release button 1002. When the first operation is detected, the control unit 101 is caused to perform biometric authentication processing. If the biometric authentication processing is successful, it is preferable to add information indicating the success of the biometric authentication processing to image files generated up to that point until the second operation is detected. Hereinafter, this control is referred to as "authentication processing after operation detection." For example, if biometric authentication processing is performed for each image capture even when the photographer is the same, the biometric authentication processing may be unnecessary. Therefore, unnecessary biometric authentication processing can be omitted by performing authentication processing after operation detection. Note that, for example, photographer information may be added as information indicating the success of the biometric authentication processing.

[0063] Furthermore, if the biometric authentication process is never successful, "Unknown" is stored as the authenticated user information, and writing to external media is permitted thereafter (steps S220 and S235). As a result, even if the biometric authentication process ends in failure, the image file in the buffer memory of the system memory unit 107 is prevented from being erased and is actually recorded in the recording unit 109. Furthermore, by confirming that the authenticated user information is "Unknown," the photographer can understand that the image file is an image file in a state where the biometric authentication process has failed. Furthermore, the transition from determining whether SW2 is detected (step S226) to counting up the no-operation time (step S208) occurs when SW2 or SW1 is input after the end of the image capture process (step S222) and SW2 is detected again. Alternatively, there may be cases where SW2 is detected after the end of the image capture process (step S222) when the no-operation time is less than the predetermined time T. In these cases, the photographer operating the image capture device 100 can be considered unchanged. As a result, the process can proceed to the start of image capture processing (step S208) without going through biometric information acquisition (step S206) and the start of biometric authentication processing (step S207). Also, if authentication information is stored at the time of SW2 detection determination (step S226), biometric authentication processing will not be executed when next image capture is started, and image capture will be performed with the previous authentication information stored as is. In this way, when capturing images consecutively, the biometric authentication processing is omitted and the same photographer information is assigned to multiple image files. This reduces the load of biometric authentication processing on the control unit 101. Note that biometric authentication processing may be performed each time an image is captured.

[0064] Furthermore, the determination of whether SW1 is detected (step S227) can be substituted by, for example, determining whether SW0 is detected, determining using a signal from the eyepiece detection unit 9, or determining whether the photographer is holding the grip unit 120 of the image capture device 100. The determination of whether the grip unit 120 is being held can be made by, for example, providing a capacitance-based or pressure-based grip detection device in the operation unit 106. Furthermore, when the determination of whether the biometric authentication process is successful determines that the biometric authentication process has failed (step S211), biometric information acquisition (step S217) and the start of the biometric authentication process (step S218) may be performed consecutively or after a predetermined time has elapsed. This is because the display of the icon 305 (step S215) allows the photographer to take measures such as changing the way they touch the biometric information acquisition unit 110. This can increase the success of the biometric authentication process by biometric information acquisition (step S217) and the start of the biometric authentication process (step S218).

[0065] FIG. 3 is a diagram showing an example of a screen displayed on the display unit of the imaging device. Here, it is assumed that the biometric information acquisition unit 110 is a fingerprint authentication sensor embedded in the release button 1002. As shown in FIG. 3(a), the display unit 104 displays a live view image 301 and an icon 302 superimposed on the live view image 301. The icon 302 is an icon indicating a "pre-authentication" state among processing status information indicating the execution status of the biometric authentication process. By visually checking the icon 302, the photographer can understand that the biometric authentication process has not yet been executed and that the biometric authentication process will be executed upon input of SW2. For example, if the release button 1002 is touched for an extremely short time when inputting SW2, the biometric information acquisition unit 110 (fingerprint authentication sensor) may not be able to read the fingerprint properly, which may result in a failure of the biometric authentication process. In this case, by notifying the user of the "pre-authentication" state using icon 302, the user can be made more aware of touching the release button 1002 with their fingertip enough to allow the biometric information acquisition unit 110 to read their fingerprint.

[0066] As shown in Fig. 3(b), the display unit 104 displays a live view image 301 and an icon 303 superimposed on the live view image 301. The icon 303 is an icon that indicates the "authenticating" state in the processing status information. This allows the photographer to understand that the first biometric authentication process is being executed, and to be conscious of keeping their fingertip in contact with the release button 1002.

[0067] As shown in Fig. 3(c), the display unit 104 displays a live view image 301 and an icon 304 superimposed on the live view image 301. The icon 304 is an icon that indicates the "authentication successful" state in the processing status information. This allows the photographer to know that the biometric authentication process has been successful after the biometric authentication process has finished.

[0068] As shown in FIG. 3(d), the display unit 104 displays a live view image 301 and an icon 305 superimposed on the live view image 301. The icon 305 is an icon that indicates the "re-authentication in progress" status in the processing status information. This allows the photographer to understand that the biometric authentication process has initially failed and is now being executed again. For example, depending on the position of the photographer's fingertip relative to the release button 1002, the biometric information acquisition unit 110 may not be able to read the fingerprint properly, which could result in a failure of the biometric authentication process. The photographer may correct the position of their fingertip relative to the release button 1002 to prevent this failure from occurring again. After that, when the biometric authentication process is executed and the icon 305 is displayed, the photographer can understand that the biometric authentication process is now being executed again.

[0069] As shown in FIG. 3(e), the display unit 104 displays a live view image 301 and an icon 306 superimposed on the live view image 301. The icon 306 is an icon that indicates the "authentication failed" status in the processing status information. This allows the photographer to understand that the biometric authentication process has failed and that the photographer information will not be added to the image file as desired after the biometric authentication process is completed. In this case, the photographer can eliminate the cause of the biometric authentication process failure, that is, correct the position of the photographer's fingertip relative to the release button 1002, for example, so that the biometric authentication process will be successful.

[0070] As shown in FIG. 3( f), the display unit 104 displays a live view image 301 and authentication failure information display guidance 307 superimposed on the live view image 301. The authentication failure information display guidance 307 includes, for example, a message (information) indicating that the biometric authentication process has failed and photographer information will not be added to the image file, or a message indicating that the user database storage process may not have been performed yet. The authentication failure information display guidance 307 also includes an OK button 308. The authentication failure information display guidance 307 can be hidden by operating the OK button 308. Note that, in this embodiment, the icon indicating the processing status information is superimposed on the live view image 301, but this is not a limitation and it is sufficient that the icon is displayed in a manner that allows the photographer to be visibly identified. For example, the icon indicating the processing status information may be superimposed on a playback image. The icon indicating the processing status information does not necessarily have to be displayed on the display unit 104, but may also be displayed on, for example, an external display communicably connected to the imaging device 100.

[0071] Second Embodiment The second embodiment will be described below with reference to FIG. 4. Differences from the previous embodiment will be mainly described, and similar points will not be described again. This embodiment is similar to the first embodiment, except that storage of an image file in the management server is permitted when authenticated user information matches management server-registered user information registered in the management server (storage unit 109). Furthermore, in this embodiment, when biometric authentication processing fails and the biometric authentication processing is repeatedly executed, the termination determination is made based on the occupancy rate of the buffer memory in the system memory unit. FIG. 4 is a flowchart showing processing executed by the imaging device according to the second embodiment. As shown in FIG. 4, in step S401, similar to step S201 in the flowchart shown in FIG. 2, the control unit 101 prepares to display an icon 302 on the display unit 104 by superimposing it on the live view image 301. After step S401 is executed, the processing proceeds to step S402.

[0072] In step S402, similar to step S202, the control unit 101 displays the live view video 301 with the icon 302 prepared in step S401 superimposed on it on the display unit 104. After step S402 is executed, the process proceeds to step S403.

[0073] In step S403, the control unit 101 determines whether SW0 of the release button 1002 has been detected. If the control unit 101 determines in step S403 that SW0 has been detected, the process proceeds to step S404. On the other hand, if the control unit 101 determines in step S403 that SW0 has not been detected, the process remains in step S403 and waits.

[0074] In step S404, similar to step S204, preparations are made to display the icon 303 superimposed on the live view image 301 on the display unit 104. After step S404 is executed, the process proceeds to step S405.

[0075] In step S405, similarly to step S206, the control unit 101 controls the biometric information acquisition unit 110 to acquire biometric information of the photographer who performs the image capture by operating the imaging device 100. After step S405 is executed, the process proceeds to step S406.

[0076] In step S406, similarly to step S207, the control unit 101 starts the biometric authentication process. After step S406 is executed, the process proceeds to step S407.

[0077] In step S407, the control unit 101 performs control to limit the shooting frame rate. The "shooting frame rate" refers to the number of still images that can be continuously shot per unit time in the imaging process. The "control to limit the shooting frame rate" refers to reducing the number of still images that can be shot to less than a predetermined number. This control makes it possible to reduce the amount of buffer memory usage in the system memory unit 107. After step S407 is executed, the process proceeds to step S408.

[0078] In step S408, similarly to step S203, the control unit 101 determines whether SW2 of the release button 1002 has been detected. If the control unit 101 determines in step S408 that SW2 has been detected, the process proceeds to step S409. On the other hand, if the control unit 101 determines in step S408 that SW2 has not been detected, the process proceeds to step S427.

[0079] In step S409, similarly to step S208, the control unit 101 starts the image capturing process by controlling the image capturing unit 105. After step S409 is executed, the process proceeds to step S410.

[0080] In step S410, similarly to step S209, control unit 101 determines whether or not the authenticated user information has already been stored in memory unit 108. If control unit 101 determines in step S410 that the authenticated user information has already been stored, the process proceeds to step S422. On the other hand, if control unit 101 determines in step S410 that the authenticated user information has not yet been stored, the process proceeds to step S411.

[0081] In step S411, similarly to step S210, the control unit 101 determines whether or not the biometric authentication process has ended. If the control unit 101 determines in step S411 that the biometric authentication process has ended, the process proceeds to step S412. On the other hand, if the control unit 101 determines in step S411 that the biometric authentication process has not ended, the process proceeds to step S422.

[0082] In step S412, similarly to step S211, the control unit 101 determines whether the biometric authentication process was successful as a result of the biometric authentication process in step S210. If the control unit 101 determines in step S412 that the biometric authentication process was successful, the process proceeds to step S413. On the other hand, if the control unit 101 determines in step S412 that the biometric authentication process failed, the process proceeds to step S419.

[0083] In step S413, the control unit 101 cancels the control performed in step S407 to limit the shooting frame rate. As a result, the imaging process is performed in accordance with the preset shooting frame rate in the imaging device 100. After step S413 is performed, the process proceeds to step S414.

[0084] In step S414, similarly to step S212, the control unit 101 stores the authorized user name, which is the name of the photographer, as authenticated user information in the memory unit 108. After step S414 is executed, the process proceeds to step S415.

[0085] In step S415, the control unit 101 determines whether the authenticated user information stored in step S414 matches the management server registered user information registered in the management server. If the control unit 101 determines in step S415 that the two pieces of information match, the process proceeds to step S416. On the other hand, if the control unit 101 determines in step S415 that the two pieces of information do not match, the process proceeds to step S417.

[0086] In step S416, the control unit 101 permits the management server to store (register) the image file (captured image). After step S416 is executed, the process proceeds to step S417.

[0087] In step S417, similar to step S213, the control unit 101 prepares to display the icon 304 on the display unit 104, superimposed on the live view image 301. After step S417 is executed, the process proceeds to step S418.

[0088] In step S418, similarly to step S214, the control unit 101 stores the image file to which the authenticated user information has been added in the management server. After step S418 is executed, the process proceeds to step S422.

[0089] In step S419 after step S412 is executed, similar to step S215, the control unit 101 prepares to display the icon 305 superimposed on the live view image 301 on the display unit 104. After step S419 is executed, the process proceeds to step S420.

[0090] In step S420, similarly to step S206, the control unit 101 controls the biometric information acquisition unit 110 to acquire biometric information of the photographer who is taking the photograph by operating the imaging device 100. After step S420 is executed, the process proceeds to step S421.

[0091] In step S421, similarly to step S207, the control unit 101 starts the biometric authentication process. After step S421 is executed, the process proceeds to step S422.

[0092] In step S422, similarly to step S222, it is determined whether or not the imaging process has ended. If the control unit 101 determines in step S422 that the imaging process has ended, the process proceeds to step S423. On the other hand, if the control unit 101 determines in step S422 that the imaging process has not ended, the process returns to step S410, and the subsequent steps are executed in order.

[0093] In step S423, similarly to step S223, the control unit 101 updates the live view video 301 displayed on the display unit 104. After step S423 is executed, the process proceeds to step S424.

[0094] In step S424, similarly to step S224, the control unit 101 determines whether or not writing of image files to external media is permitted.

[0095] If the control unit 101 determines in step S424 that writing of the image file is permitted, the process returns to step S408, and the subsequent steps are executed in order. On the other hand, if the control unit 101 determines in step S424 that writing of the image file is not permitted, the process proceeds to step S425.

[0096] In step S425, similarly to step S225, the control unit 101 temporarily stores the image file for which it is determined in step S422 that the image capture process has been completed in the buffer memory within the system memory unit 107. After step S425 is executed, the process proceeds to step S426.

[0097] In step S426, the control unit 101 determines whether the buffer memory occupancy rate on the system memory unit 107 is less than a predetermined value. The "buffer memory occupancy rate" refers to the ratio of the capacity of the entire buffer memory on the system memory unit 107 that is used to store image files acquired in the actual shooting. The "predetermined value," which is the criterion for determination in step S426, is preferably configurable as appropriate. If the control unit 101 determines in step S426 that the buffer memory occupancy rate is less than the predetermined value, the process returns to step S408, and the subsequent steps are executed in order. On the other hand, if the control unit 101 determines in step S426 that the buffer memory occupancy rate is not less than the predetermined value, i.e., is equal to or greater than the predetermined value, the process proceeds to step S439.

[0098] In step S427, similarly to step S403, the control unit 101 determines whether or not SW0 has been detected. If the control unit 101 determines in step S427 that SW0 has been detected, the process proceeds to step S430. On the other hand, if the control unit 101 determines in step S427 that SW0 has not been detected, the process remains in standby at step S428.

[0099] In step S428, the control unit 101 counts up the no-operation time, similarly to step S228. After step S428 is executed, the process proceeds to step S429.

[0100] In step S429, similarly to step S229, control unit 101 determines whether the no-operation time exceeds the threshold "predetermined time T." If control unit 101 determines in step S429 that the no-operation time exceeds the threshold "predetermined time T," the process proceeds to step S431. On the other hand, if control unit 101 determines in step S429 that the no-operation time does not exceed the threshold "predetermined time T," the process returns to step S427, and the subsequent steps are executed in order.

[0101] In step S430, the control unit 101 clears the no-operation time, similarly to step S230. After step S430 is executed, the process returns to step S408, and the subsequent steps are executed in order.

[0102] In step S431, similarly to step S209, control unit 101 determines whether or not the authenticated user information has already been stored in memory unit 108. If control unit 101 determines in step S431 that the authenticated user information has already been stored, the process proceeds to step S438. On the other hand, if control unit 101 determines in step S431 that the authenticated user information has not yet been stored, the process proceeds to step S432.

[0103] In step S432, similarly to step S210, the control unit 101 determines whether or not the biometric authentication process has ended. If the control unit 101 determines in step S432 that the biometric authentication process has ended, the process proceeds to step S43. On the other hand, if the control unit 101 determines in step S432 that the biometric authentication process has not ended, the process remains in step S432 and waits.

[0104] In step S433, similarly to step S211, the control unit 101 determines whether the biometric authentication process was successful as a result of the biometric authentication process in step S232. If the control unit 101 determines in step S433 that the biometric authentication process was successful, the process proceeds to step S434. On the other hand, if the control unit 101 determines in step S433 that the biometric authentication process failed, the process proceeds to step S439.

[0105] In step S434, similarly to step S212, the control unit 101 stores, as authenticated user information, the authorized user name, which is the name of the photographer who is authorized to use the imaging device 100, in the memory unit 108. After step S434 is executed, the process proceeds to step S435.

[0106] In step S435, similarly to step S415, the control unit 101 determines whether the authenticated user information stored in step S434 matches the management server registered user information registered in the management server. If the control unit 101 determines in step S435 that the two pieces of information match, the process proceeds to step S436. On the other hand, if the control unit 101 determines in step S435 that the two pieces of information do not match, the process proceeds to step S437.

[0107] In step S436, similarly to step S416, the control unit 101 permits the management server to store the image file. After step S436 is executed, the process proceeds to step S437.

[0108] In step S437, similarly to step S214, the control unit 101 stores the image file to which the authenticated user information has been added in the management server. After step S437 is executed, the process proceeds to step S438.

[0109] In step S438, the control unit 101 determines whether the buffer memory is empty. "The buffer memory is empty" means that all image files have been stored in the external media or the management server, and there are no image files remaining in the buffer memory. If the control unit 101 determines in step S438 that the buffer memory is empty, the process proceeds to step S441. On the other hand, if the control unit 101 determines in step S438 that the buffer memory is not empty, the process remains in step S438 and waits.

[0110] In step S439 after step S433 is executed, the control unit 101 collectively deletes the temporarily stored image files remaining in the buffer memory on the memory unit 108. After step S439 is executed, the process proceeds to step S440.

[0111] In step S440, similarly to step S236, the control unit 101 displays the authentication failure information display guidance 307 on the display unit 104, superimposed on the live view image 301. After step S440 is executed, the process proceeds to step S441.

[0112] In step S441, the control unit 101 clears the authenticated user information stored in the memory unit 108 and prohibits the storage (registration) of image files in the management server. After step S441 is executed, the process ends.

[0113] In the above control, if the biometric authentication process ultimately fails (step S433), all image files stored in the buffer memory are deleted in one go (step S439). In this case, no image files are recorded in the recording unit 109. This prevents image files without photographer information from being recorded in the recording unit 109 when the biometric authentication process fails. Furthermore, if it is determined that the buffer memory occupancy rate is equal to or greater than a predetermined value before the capture process is stopped (step S426), all image files stored in the buffer memory are deleted in one go (step S439). If the free space in the buffer memory becomes relatively small, the capacity to temporarily store subsequent image files in the buffer memory may become insufficient. This may make it difficult to continue the capture process. If the biometric authentication process repeatedly fails, it is preferable to correct the unsuccessful state before it becomes difficult to continue the capture process. Therefore, by deleting all image files in the buffer memory corresponding to the unsuccessful biometric authentication process, the capture process can be continued. Deleting image files from the buffer memory in this manner is convenient for the user in that it prevents image files without photographer information from being recorded in the recording unit 109.

[0114] Furthermore, the control to limit the frame rate of the image capture (step S407) suppresses an increase in the buffer memory occupancy rate during the biometric authentication process. Furthermore, the above-described control can buy time from the start of the image capture process until the buffer memory occupancy rate reaches a predetermined value or more (step S426) and the image files in the buffer memory are subsequently deleted all at once. As described above, biometric authentication takes time, but by buying time until the images are deleted all at once, sufficient time can be secured for the biometric authentication process. This increases the success rate of the biometric authentication process. Furthermore, the biometric authentication process is re-executed (step S421). This re-execution of the biometric authentication process, combined with the suppression of an increase in the buffer memory occupancy rate, ensures a sufficient number of attempts to re-execute the biometric authentication process if the biometric authentication process fails. This increases the success rate of the biometric authentication process. Furthermore, the biometric authentication process is started in response to the detection of SW0 (step S403) before the detection of SW2 (step S408). This control contributes to buying time required for the biometric authentication process until the buffer memory occupancy rate reaches a predetermined value or more. Note that the decision to repeat the biometric authentication process can also be made after a predetermined time has elapsed since the start of the biometric authentication process. Furthermore, the start of the image capture process or the biometric authentication process is based on the detection result of SW0, but this is not limited to this and may be based on the detection result of SW1. In either case, the biometric authentication process can be started before the image capture process is started, thereby saving time required for the biometric authentication process.

[0115] <Third embodiment> The third embodiment will be described below with reference to FIGS. 5 and 6. Differences from the previous embodiments will be mainly described, and similar points will not be described again. This embodiment is similar to the first embodiment, except that a temporary ID is assigned to an image file and recorded if the biometric authentication process is not completed before the end of the image capture process or if the biometric authentication process fails. Furthermore, in this embodiment, if the biometric authentication process is successful, the temporary ID of the image file to which the temporary ID has been assigned is replaced (transferred) with a valid user name, and the image file is recorded. FIG. 5 shows a user database stored in the memory unit of the imaging device according to the third embodiment. As shown in FIG. 5, the user database 500 stores a temporary ID 501, a valid user name 502, biometric information 503, and a temporary ID assignment history 504, all of which are linked to one another. The temporary ID 501 is associated information related to the biometric information 503 and is photographer information for temporarily identifying the photographer. The temporary ID 501 is generated by the control unit 101. In this way, the control unit 101 also functions as a generating unit for generating the temporary ID 501. The temporary ID 501 is generated before the temporary ID 501 is temporarily assigned. In the imaging device 100, a unit functioning as a generation unit may be provided separately from the control unit 101. The authorized user name 502 is photographer information registered by the photographer when the photographer is registered. If the authorized user's biometric information matching the biometric information 503 acquired when the temporary ID 501 is generated is not registered, the authorized user name field remains blank. The biometric information 503 is information acquired by the biometric information acquisition unit 110. The temporary ID assignment history 504 is an assignment history for identifying the image file to which the temporary ID 501 is assigned, and is information related to the image file. In this embodiment, the temporary ID assignment history 504 uses the name of the image file to which the temporary ID 501 is assigned, but is not limited to this. Other examples of the temporary ID assignment history 504 include information in metadata assigned to the image file and information acquired by processing the image file.

[0116] Fig. 6 is a flowchart showing the processing executed by the imaging device. As shown in Fig. 6, in step S601, similar to step S201, the control unit 101 prepares to display an icon 302 superimposed on a live view image 301 on the display unit 104. After step S601 is executed, the processing proceeds to step S602.

[0117] In step S602, similar to step S202, the control unit 101 displays the live view video 301 with the icon 302 prepared in step S601 superimposed on it on the display unit 104. After step S602 is executed, the process proceeds to step S603.

[0118] In step S603, similar to step S203, the control unit 101 determines whether SW2 of the release button 1002 has been detected. If the control unit 101 determines in step S603 that SW2 has been detected, the process proceeds to step S604. On the other hand, if the control unit 101 determines in step S603 that SW2 has not been detected, the process remains in standby at step S603.

[0119] In step S604, similarly to step S204, the control unit 101 prepares to display the icon 303 on the display unit 104, superimposed on the live view video 301. After step S604 is executed, the process proceeds to step S605.

[0120] In step S605, similarly to step S206, the control unit 101 controls the biometric information acquisition unit 110 to acquire biometric information of the photographer who operates the imaging device 100 to capture an image. After step S605 is executed, the process proceeds to step S606.

[0121] In step S606, the control unit 101 generates a temporary ID 501, associates the temporary ID 501 with the biometric information acquired in step S605, and stores them in the memory unit 108. After step S606 is executed, the process proceeds to step S607.

[0122] In step S607, the control unit 101 sets the temporary ID 501 generated in step S606 in the authenticated user information. After step S607 is executed, the process proceeds to step S608.

[0123] In step S608, similarly to step S207, the control unit 101 starts the biometric authentication process. After step S608 is executed, the process proceeds to step S609.

[0124] In step S609, similarly to step S208, the control unit 101 starts the image capturing process by controlling the image capturing unit 105. After step S609 is executed, the process proceeds to step S610.

[0125] In step S610, the control unit 101 determines whether the temporary ID 501 is set in the authenticated user information. If the control unit 101 determines in step S610 that the temporary ID 501 is set in the authenticated user information, the process proceeds to step S611. On the other hand, if the control unit 101 determines in step S610 that the temporary ID 501 is not set in the authenticated user information, the process proceeds to step S615.

[0126] In step S611, similarly to step S210, the control unit 101 determines whether the biometric authentication process has ended. If the control unit 101 determines in step S611 that the biometric authentication process has ended, the process proceeds to step S612. On the other hand, if the control unit 101 determines in step S611 that the biometric authentication process has not ended, the process proceeds to step S620.

[0127] In step S612, similarly to step S211, the control unit 101 determines whether the biometric authentication process was successful as a result of the biometric authentication process in step S611. If the control unit 101 determines in step S612 that the biometric authentication process was successful, the process proceeds to step S613. On the other hand, if the control unit 101 determines in step S612 that the biometric authentication process failed, the process proceeds to step S616.

[0128] In step S613, similarly to step S212, the control unit 101 stores, as authenticated user information, the authorized user name, which is the name of the photographer who is authorized to use the imaging device 100, in the memory unit 108. After step S613 is executed, the process proceeds to step S614.

[0129] In step S614, similarly to step S213, the control unit 101 prepares to display the icon 304 on the display unit 104, superimposed on the live view video 301. After step S614 is executed, the process proceeds to step S615.

[0130] In step S615, similarly to step S214, the control unit 101 officially stores the image file to which the authenticated user information has been added in the recording unit 109. After step S615 is executed, the process proceeds to step S622.

[0131] In step S616 after step S612 is executed, similar to step S215, the control unit 101 prepares to display the icon 305 superimposed on the live view image 301 on the display unit 104. After step S616 is executed, the process proceeds to step S617.

[0132] In step S617, similarly to step S206, the control unit 101 controls the biometric information acquisition unit 110 to acquire biometric information of the photographer who is taking the photograph by operating the imaging device 100. After step S617 is executed, the process proceeds to step S618.

[0133] In step S618, the control unit 101 associates the temporary ID 501 and biometric information stored in the memory unit 108 in step S606 with the biometric information acquired in step S617, and stores them in the memory unit 108. Because the biometric information that can be acquired during the photographer's shooting operation may change, it is preferable to additionally store the biometric information associated with the temporary ID 501. This is because, since the icon 305 indicating "re-authentication in progress" is displayed in step S616, the biometric information that can be acquired may change if the photographer takes measures such as correcting the position of the finger relative to the fingerprint authentication sensor. After step S618 is executed, the process proceeds to step S619.

[0134] In step S619, similarly to step S207, the control unit 101 starts the biometric authentication process. After step S619 is executed, the process proceeds to step S620.

[0135] In step S620, similarly to step S214, the control unit 101 officially stores the image file to which the authenticated user information has been added in the recording unit 109. After step S620 is executed, the process proceeds to step S621.

[0136] In step S621, the control unit 101 associates the temporary ID 501 stored in the memory unit 108 in step S606 with the image file name whose data has been transferred to the recording unit 109 as temporary ID assignment history 504, and stores the association in the memory unit 108. After step S621 is executed, the process proceeds to step S622.

[0137] In step S622, similarly to step S222, the control unit 101 determines whether or not the imaging process has ended. If the control unit 101 determines in step S622 that the imaging process has ended, the process proceeds to step S623. On the other hand, if the control unit 101 determines in step S622 that the imaging process has not ended, the process returns to step S610, and the subsequent steps are executed in order.

[0138] In step S623, similarly to step S223, the control unit 101 updates the live view video 301 displayed on the display unit 104. After step S623 is executed, the process proceeds to step S624.

[0139] In step S624, similar to step S203, the control unit 101 determines whether SW2 of the release button 1002 has been detected. If the control unit 101 determines in step S624 that SW2 has been detected, the process returns to step S609, and the subsequent steps are executed in order. On the other hand, if the control unit 101 determines in step S624 that SW2 has not been detected, the process proceeds to step S625.

[0140] In step S625, similar to step S227, the control unit 101 determines whether or not SW1 of the release button 1002 has been detected. If the control unit 101 determines in step S625 that SW1 has been detected, the process proceeds to step S626. On the other hand, if the control unit 101 determines in step S625 that SW1 has not been detected, the process proceeds to step S627.

[0141] In step S626, the control unit 101 clears the no-operation time, similarly to step S230. After step S626 is executed, the process returns to step S624, and the subsequent steps are executed in order.

[0142] In step S627, the control unit 101 counts up the no-operation time, similarly to step S228. After step S627 is executed, the process proceeds to step S628.

[0143] In step S628, similarly to step S229, control unit 101 determines whether the no-operation time exceeds the threshold "predetermined time T." If control unit 101 determines in step S628 that the no-operation time exceeds the threshold "predetermined time T," the process proceeds to step S629. On the other hand, if control unit 101 determines in step S628 that the no-operation time does not exceed the threshold "predetermined time T," the process returns to step S625, and the subsequent steps are executed in order.

[0144] In step S629, similarly to step S610, the control unit 101 determines whether the temporary ID 501 is set in the authenticated user information. If the control unit 101 determines in step S629 that the temporary ID 501 is set in the authenticated user information, the process proceeds to step S630. On the other hand, if the control unit 101 determines in step S629 that the temporary ID 501 is not set in the authenticated user information, the process proceeds to step S633.

[0145] In step S630, similar to step S210, the control unit 101 determines whether the biometric authentication process has ended. If the control unit 101 determines in step S630 that the biometric authentication process has ended, the process proceeds to step S631. On the other hand, if the control unit 101 determines in step S630 that the biometric authentication process has not ended, the process remains in step S630 and waits.

[0146] In step S631, similarly to step S211, the control unit 101 determines whether the biometric authentication process was successful as a result of the biometric authentication process in step S630. If the control unit 101 determines in step S631 that the biometric authentication process was successful, the process proceeds to step S632. On the other hand, if the control unit 101 determines in step S631 that the biometric authentication process failed, the process proceeds to step S637.

[0147] In step S632, similarly to step S212, the control unit 101 stores, as authenticated user information, the authorized user name, which is the name of the photographer who is authorized to use the imaging device 100, in the memory unit 108. After step S632 is executed, the process proceeds to step S633.

[0148] In step S633, control unit 101 determines whether the image file assigned temporary ID 501 stored in step S606 is saved in buffer memory or external media. If control unit 101 determines in step S633 that the image file is saved, the process proceeds to step S634. On the other hand, if control unit 101 determines in step S633 that the image file is not saved, the process proceeds to step S636.

[0149] In step S634, the control unit 101 changes the photographer information of the image file to which the temporary ID 501 has been assigned to the regular user name set in the authenticated user information. After step S634 is executed, the process proceeds to step S635.

[0150] In step S635, similar to step S633, it is determined whether the image file assigned with the temporary ID 501 stored in step S606 is saved in the buffer memory or external media. If the control unit 101 determines in step S635 that the image file is saved, the process proceeds to step S634. On the other hand, if the control unit 101 determines in step S635 that the image file is not saved, the process proceeds to step S636.

[0151] In step S636, control unit 101 deletes temporary ID 501 and biometric information generated in step S606, and temporary ID assignment history 504 stored in step S621. After step S636 is executed, the process proceeds to step S638.

[0152] In step S637, similarly to step S236, the control unit 101 displays the authentication failure information display guidance 307 (see FIG. 3(f)) on the display unit 104, superimposed on the live view image 301. After step S637 is executed, the process proceeds to step S638.

[0153] In step S638, similar to step S238, control unit 101 determines whether all image files temporarily stored in the buffer memory in system memory unit 107 have been actually recorded in recording unit 109. If control unit 101 determines in step S638 that all image files have been actually recorded in recording unit 109, the process proceeds to step S639. On the other hand, if control unit 101 determines in step S638 that all image files have not been actually recorded in recording unit 109, the process remains in standby at step S638.

[0154] In step S639, similarly to step S239, control unit 101 clears the authenticated user information stored in memory unit 108, and the process ends.

[0155] In the above control, a temporary ID 501 is generated (step S606), the temporary ID 501 is set in the authenticated user information (step S607), and then writing to external media is permitted. This allows the temporary ID 501 to be temporarily assigned to the image file and the image file to be stored in the recording unit 109. Therefore, the image file can be saved without being affected by, for example, the processing time or results of the biometric authentication process. Furthermore, by confirming that the photographer information of the image file is set to the temporary ID 501, the photographer can determine that the image file is one for which biometric authentication processing has failed. Furthermore, in the above control, it is determined whether an image file assigned the temporary ID 501 has been saved (step S633). If an image file assigned the temporary ID 501 has been saved, the temporary ID 501 is replaced with the legitimate user name (step S634). This increases the reliability that the image file was taken by a photographer with the legitimate user name. Furthermore, the temporary ID 501, the biometric information, and the temporary ID assignment history 504 are deleted (step S636). This contributes to reducing the amount of space used in the memory unit 108. Furthermore, the temporary ID 501 and the temporary ID assignment history 504 are stored in association with each other (step S621). This makes it possible to prevent information on the image file to be assigned from being tampered with when the image file to which the temporary ID 501 has been assigned is assigned to a legitimate user name after user registration. Furthermore, the temporary ID 501 and the like may be temporarily stored in the system memory unit 107, and then stored in the memory unit 108 if the biometric authentication process is not successful after all image capture processes are completed and a legitimate user name cannot be assigned. Furthermore, even if image capture processing is performed without user registration, correct photographer information can be assigned by subsequently performing user registration.

[0156] <Fourth embodiment> The fourth embodiment will be described below with reference to Fig. 7, focusing on differences from the previously described embodiments, and similar aspects will not be described again. Fig. 7 is a flowchart showing processing executed by an imaging device according to the fourth embodiment. As shown in Fig. 7, in step S701, the control unit 101 determines whether an instruction to start user registration has been received from the operation unit 106. If the control unit 101 determines in step S701 that an instruction to start user registration has been received, the processing proceeds to step S702. On the other hand, if the control unit 101 determines in step S701 that an instruction to start user registration has not been received, the processing remains in standby at step S701.

[0157] In step S702, the control unit 101 displays an instruction (input notice) to input a valid user name to be registered in the user database on the display unit 104. After step S702 is executed, the process proceeds to step S703.

[0158] In step S703, the control unit 101 acquires the authorized user name input via the operation unit 106. After step S703 is executed, the process proceeds to step S704.

[0159] In step S704, the control unit 101 causes the display unit 104 to display a notification to touch the biometric information acquisition unit 110. After step S704 is executed, the process proceeds to step S705.

[0160] In step S705, similarly to step S206, the control unit 101 controls the biometric information acquisition unit 110 to acquire biometric information of the photographer who is taking the photograph by operating the imaging device 100. After step S705 is executed, the process proceeds to step S706.

[0161] In step S706, the control unit 101 associates the authorized user name acquired in step S703 with the biometric information acquired in step S705, and stores the associated information as authorized user information in the memory unit 108. After step S706 is executed, the process proceeds to step S707.

[0162] In step S707, the control unit 101 determines whether the biometric information stored in step S706 matches the biometric information stored in association with the temporary ID in the user database of the memory unit 108. If the control unit 101 determines in step S707 that the two pieces of information match, the process proceeds to step S708. On the other hand, if the control unit 101 determines in step S707 that the two pieces of information do not match, the process ends.

[0163] In step S708, the control unit 101 associates the authorized user information with the temporary ID information and stores them in the memory unit 108. After step S708 is executed, the process proceeds to step S711.

[0164] In step S709, the control unit 101 sets the regular user name associated with the temporary ID information in the authenticated user information. After step S709 is executed, the process proceeds to step S710.

[0165] In step S710, the control unit 101 sets the temporary ID linked to the authorized user information saved in step S708 as search ID information. After step S710 is executed, the process proceeds to step S711.

[0166] In step S711, the control unit 101 determines whether or not there is an image file in the recording unit 109 that has been assigned the same temporary ID as the search ID information. If the control unit 101 determines in step S711 that there is an image file that has been assigned the same temporary ID as the search ID information, the process proceeds to step S712. On the other hand, if the control unit 101 determines in step S711 that there is no image file that has been assigned the same temporary ID as the search ID information, the process proceeds to step S715.

[0167] In step S712, the control unit 101 determines whether the file name of the image file in the recording unit 109 to which the search ID information is assigned matches the temporary ID assignment history stored in the memory unit 108 and associated with the same temporary ID as the search ID information. The information used for the determination in step S712 is not limited to the file name of the image file, but may also be, for example, information in metadata assigned to the image file or information obtained by processing the image file. Furthermore, if the image file itself has been tampered with, the temporary ID assignment history will not match, and the user name will not be changed to a legitimate user name. This allows the correct photographer information to be assigned to image files assigned temporary IDs and stored in the recording unit 109. If the control unit 101 determines in step S712 that the two match, the process proceeds to step S713. On the other hand, if the control unit 101 determines in step S712 that the two do not match, the process proceeds to step S714.

[0168] In step S713, similar to step S634, the control unit 101 changes the photographer information of the image file to which the temporary ID 501 has been assigned to the authorized user name set in the authenticated user information. Note that when changing the authorized user name, the change may be made all at once at the time of user registration, or may be made all at once by a menu operation by the user. After step S713 is executed, the process proceeds to step S714.

[0169] In step S714, the control unit 101 determines whether a match has been determined in the temporary ID assignment history for all image files assigned the same temporary ID as the search ID information stored in the recording unit 109. If the control unit 101 determines in step S714 that a match has been determined, the process proceeds to step S715. On the other hand, if the control unit 101 determines in step S714 that a match has not been determined, the process returns to step S712, and the subsequent steps are executed in order.

[0170] In step S715, the control unit 101 clears the authenticated user information and search ID information, and the process ends.

[0171] In the above control, it is determined whether the biometric information matches (step S707), and the matching biometric information is linked and saved (step S708). This allows the legitimate user information and temporary ID information of a newly registered user to be correctly linked and saved.

[0172] Although preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and various modifications and variations are possible within the spirit and scope of the present invention. The present invention can also be realized by supplying a program that realizes one or more functions of the above-described embodiments to a system or device via a network or a storage medium. One or more general-purpose processors (ASICs) in the computer of the system or device read and execute the program. The present invention can also be realized by a dedicated processor (e.g., an ASIC or FPGA) that realizes one or more functions. Furthermore, the present invention can also be realized by a combination of a general-purpose processor and a dedicated processor. The term "processor" used here refers to a processor in a broad sense and includes both general-purpose processors and dedicated processors. Furthermore, the processing that realizes the present invention may be performed by a single processor alone, or may be performed by multiple processors located in physically separate locations in cooperation with each other.

[0173] The disclosure of each embodiment includes the following configurations, methods, and programs. (Configuration 1) An imaging means for performing an imaging process to capture an image and generate image data; a temporary storage means for temporarily storing the image data; an acquisition unit for acquiring biometric information of an operator who performs an operation to instruct the imaging process; a biometric authentication unit that performs a biometric authentication process to authenticate the operator based on the biometric information acquired by the acquisition unit; a control unit that controls the imaging unit, the temporary storage unit, the acquisition unit, and the biometric authentication unit, the control means starts the imaging process by the imaging means and starts the biometric authentication process by the biometric authentication means, and if the biometric authentication process has not finished before the imaging process finishes, temporarily stores the image data generated by the imaging process in the temporary storage means, and if the biometric authentication process finishes after the temporary storage, adds the result of the biometric authentication process to the image data temporarily stored in the temporary storage means. (Configuration 2) The imaging device described in Configuration 1, wherein the control means, when the biometric authentication process is completed after the temporary storage, also assigns the results of the biometric authentication process to the image data generated by the imaging process after the biometric authentication process is completed. (Configuration 3) The imaging device is communicably connected to a storage means for storing the image data, 3. The imaging device according to claim 1, wherein the control means is capable of storing the image data, to which the result of the biometric authentication process has been added, in the storage means. (Configuration 4) The imaging device according to Configuration 3, wherein the storage means is a storage medium that is fixed or detachable to the imaging device, or an external device that is configured separately from the imaging device and located in a different position from the imaging device. (Configuration 5) An information storage means is provided in which the biometric information is stored in advance, The imaging device according to any one of configurations 1 to 4, wherein the biometric authentication means, as the biometric authentication processing, compares the biometric information acquired by the acquisition means with the biometric information pre-stored in the information storage means, and determines whether the two sets of biometric information match. (Configuration 6) The image is a still image, The imaging device according to any one of configurations 1 to 5, wherein the control means is capable of reducing the number of still images that can be captured per unit time in the imaging process when the biometric authentication process by the biometric authentication means starts, and canceling the reduction in the number of images that can be captured when the biometric authentication process by the biometric authentication means ends. (Configuration 7) The imaging device according to any one of configurations 1 to 6, wherein the control means is capable of assigning identification information that can identify the operator as a result of the biometric authentication process. (Configuration 8) A display means is provided that is controlled by the control means and displays a screen, 8. The imaging device according to any one of configurations 1 to 7, wherein the control means causes the display means to display processing status information indicating an execution status of the biometric authentication processing. (Configuration 9) The imaging device described in Configuration 8, wherein the control means causes the display means to display, as the processing status information, before the start of the biometric authentication processing, that the biometric authentication processing has not yet started, and while the biometric authentication processing is being executed, causes the display means to display that the biometric authentication processing is being executed, and after the biometric authentication processing has ended, causes the display means to display that the biometric authentication processing has ended. (Configuration 10) The imaging device described in Configuration 9, wherein the control means, as the processing status information, causes the display means to display a message indicating that the biometric authentication processing has been successful if the biometric authentication processing has been successful, and causes the display means to display a message indicating that the biometric authentication processing has been unsuccessful if the biometric authentication processing has been unsuccessful. (Configuration 11) The imaging device according to any one of configurations 8 to 10, wherein the display means is capable of visualizing the image data and displaying it together with the processing status information. (Configuration 12) An imaging means for performing an imaging process for capturing an image and generating image data; an acquisition unit for acquiring biometric information of an operator who performs an operation to instruct the imaging process; a biometric authentication unit that performs a biometric authentication process to authenticate the operator based on the biometric information acquired by the acquisition unit; a detection means for detecting a first operation and a second operation performed by the operator in sequence with a time difference; a control unit that controls the imaging unit, the acquisition unit, the biometric authentication unit, and the detection unit, the control means, when the first operation is detected by the detection means, causes the biometric authentication means to perform the biometric authentication process, and, if the biometric authentication process is successful, adds information indicating that the biometric authentication process has been successful to the image data generated by the imaging process until the second operation is detected by the detection means, until the second operation is detected by the detection means. (Configuration 13) A release button is provided which is pressed in two stages when the operator performs an operation to instruct the image capturing process, The imaging device described in configuration 12, wherein the detection means detects a first-stage pressing operation of the release button as the first operation, and detects a second-stage pressing operation of the release button as the second operation. (Configuration 14) A release button is provided which is pressed when the operator performs an operation to instruct the image capturing process, The imaging device described in configuration 12 or 13, wherein the detection means detects a contact of the operator with the release button as the first operation, and detects a pressing operation of the operator with respect to the release button as the second operation. (Configuration 15) The imaging device according to any one of configurations 12 to 14, wherein the control means is capable of assigning identification information that can identify the operator as information indicating that the biometric authentication process has been successful. (Configuration 16) An imaging means for performing an imaging process for capturing an image and generating image data; an acquisition unit for acquiring biometric information of an operator who performs an operation to instruct the imaging process; a biometric authentication unit that performs a biometric authentication process to authenticate the operator based on the biometric information acquired by the acquisition unit; a control unit that controls the imaging unit, the acquisition unit, and the biometric authentication unit, The control means starts the imaging process by the imaging means and starts the biometric authentication process by the biometric authentication means, and if the biometric authentication process is not completed by the time the imaging process is completed, provisionally assigns related information related to the biometric information to the image data generated by the imaging process. (Configuration 17) The imaging device according to configuration 16, further comprising a generating unit that generates the related information before the control unit provisionally assigns the related information. (Configuration 18) The imaging device described in Configuration 16 or 17, characterized in that when the biometric authentication process is completed, the control means is capable of replacing the related information assigned to the image data generated by the imaging process with identification information that can identify the operator. (Method 1) An imaging process of capturing an image and generating image data; a temporary storage step of temporarily storing the image data; an acquisition step of acquiring biometric information of an operator who performs an operation to instruct the imaging process; a biometric authentication step of performing a biometric authentication process for authenticating the operator based on the biometric information acquired in the acquisition step; a control step for controlling the imaging step, the temporary storage step, the acquisition step, and the biometric authentication step, a control method for an imaging device, characterized in that in the control step, the imaging process in the imaging step is started, and the biometric authentication process in the biometric authentication step is started; if the biometric authentication process has not finished before the imaging process is finished, the image data generated by the imaging process is temporarily stored in the temporary storage step; and if the biometric authentication process is finished after the temporary storage, the result of the biometric authentication process is assigned to the image data temporarily stored in the temporary storage step. (Program 1) A program for causing a computer to execute each means of the imaging device described in any one of configurations 1 to 1. [Explanation of symbols]

[0174] 100 Imaging device 101 Control section 104 Display section 105 Imaging unit 107 System Memory Section 108 Memory section 109 Recording Department 110 Biometric information acquisition unit 1002 release button

Claims

1. an imaging means for performing an imaging process for capturing an image and generating image data; a temporary storage means for temporarily storing the image data; an acquisition unit for acquiring biometric information of an operator who performs an operation to instruct the imaging process; a biometric authentication unit that performs a biometric authentication process to authenticate the operator based on the biometric information acquired by the acquisition unit; a control unit that controls the imaging unit, the temporary storage unit, the acquisition unit, and the biometric authentication unit, the control means starts the imaging process by the imaging means and starts the biometric authentication process by the biometric authentication means, and if the biometric authentication process has not finished before the imaging process finishes, temporarily stores the image data generated by the imaging process in the temporary storage means, and if the biometric authentication process finishes after the temporary storage, adds the result of the biometric authentication process to the image data temporarily stored in the temporary storage means.

2. 2. The imaging device according to claim 1, wherein, when the biometric authentication process is completed after the temporary storage, the control means assigns the result of the biometric authentication process to the image data generated by the imaging process after the biometric authentication process is completed.

3. the imaging device is communicably connected to a storage means that stores the image data; 2. The imaging device according to claim 1, wherein the control means is capable of storing the image data, to which the result of the biometric authentication process has been added, in the storage means.

4. The imaging device according to claim 3, wherein the storage means is a storage medium that is fixed or detachable to the imaging device, or an external device that is configured separately from the imaging device and located in a different position from the imaging device.

5. an information storage means in which the biometric information is stored in advance, 2. The imaging device according to claim 1, wherein the biometric authentication means, as part of the biometric authentication process, compares the biometric information acquired by the acquisition means with the biometric information pre-stored in the information storage means to determine whether the two sets of biometric information match.

6. the image is a still image, 2. The imaging device according to claim 1, wherein the control means is capable of reducing the number of still images that can be taken per unit time in the imaging process when the biometric authentication process by the biometric authentication means starts, and canceling the reduction in the number of images that can be taken when the biometric authentication process by the biometric authentication means ends.

7. 2. The imaging apparatus according to claim 1, wherein the control means is capable of assigning identification information that can identify the operator as a result of the biometric authentication process.

8. a display means controlled by the control means to display a screen; 2. The imaging device according to claim 1, wherein the control means causes the display means to display processing status information indicating an execution status of the biometric authentication processing.

9. 9. The imaging device according to claim 8, wherein the control means causes the display means to display, as the processing status information, before the start of the biometric authentication processing, a message indicating that the biometric authentication processing has not yet started; while the biometric authentication processing is being executed, a message indicating that the biometric authentication processing is being executed; and, after the biometric authentication processing has been completed, a message indicating that the biometric authentication processing has been completed.

10. 10. The imaging device according to claim 9, wherein the control means causes the display means to display, as the processing status information, a message indicating that the biometric authentication processing has been successful if the biometric authentication processing has been successful, and causes the display means to display a message indicating that the biometric authentication processing has been unsuccessful if the biometric authentication processing has been unsuccessful.

11. 9. The imaging apparatus according to claim 8, wherein the display means is capable of visualizing the image data and displaying it together with the processing status information.

12. an imaging means for performing an imaging process for capturing an image and generating image data; an acquisition unit for acquiring biometric information of an operator who performs an operation to instruct the imaging process; a biometric authentication unit that performs a biometric authentication process to authenticate the operator based on the biometric information acquired by the acquisition unit; a detection means for detecting a first operation and a second operation performed by the operator in sequence with a time difference; a control unit that controls the imaging unit, the acquisition unit, the biometric authentication unit, and the detection unit, an imaging device characterized in that, when the detection means detects the first operation, the control means causes the biometric authentication means to perform the biometric authentication process, and, if the biometric authentication process is successful, adds information indicating that the biometric authentication process was successful to the image data generated by the imaging process until the detection means detects the second operation, until the second operation is detected.

13. a release button that is pressed in two stages when the operator performs an operation to instruct the image capturing process, 13. The imaging device according to claim 12, wherein the detection means detects a first-stage pressing operation of the release button as the first operation, and detects a second-stage pressing operation of the release button as the second operation.

14. a release button that is pressed when the operator performs an operation to instruct the image capturing process, 13. The imaging device according to claim 12, wherein the detection means detects a contact of the operator with the release button as the first operation, and detects a pressing operation of the operator with respect to the release button as the second operation.

15. 13. The imaging apparatus according to claim 12, wherein the control means is capable of adding identification information capable of identifying the operator as information indicating that the biometric authentication process has been successful.

16. an imaging means for performing an imaging process for capturing an image and generating image data; an acquisition unit for acquiring biometric information of an operator who performs an operation to instruct the imaging process; a biometric authentication unit that performs a biometric authentication process to authenticate the operator based on the biometric information acquired by the acquisition unit; a control unit that controls the imaging unit, the acquisition unit, and the biometric authentication unit, The control means starts the imaging process by the imaging means and starts the biometric authentication process by the biometric authentication means, and if the biometric authentication process is not completed by the time the imaging process is completed, provisionally assigns related information related to the biometric information to the image data generated by the imaging process.

17. 17. The imaging device according to claim 16, further comprising a generating unit that generates the related information before the control unit provisionally assigns the related information.

18. 17. The imaging device according to claim 16, wherein the control means is capable of replacing the related information assigned to the image data generated by the imaging process with identification information capable of identifying the operator when the biometric authentication process is completed.

19. an imaging process for capturing an image and generating image data; a temporary storage step of temporarily storing the image data; an acquisition step of acquiring biometric information of an operator who performs an operation to instruct the imaging process; a biometric authentication step of performing a biometric authentication process for authenticating the operator based on the biometric information acquired in the acquisition step; a control step for controlling the imaging step, the temporary storage step, the acquisition step, and the biometric authentication step, a control method for an imaging device, characterized in that in the control step, the imaging process in the imaging step is started, and the biometric authentication process in the biometric authentication step is started; if the biometric authentication process has not finished before the imaging process is finished, the image data generated by the imaging process is temporarily stored in the temporary storage step; and if the biometric authentication process is finished after the temporary storage, the result of the biometric authentication process is assigned to the image data temporarily stored in the temporary storage step.

20. 17. A program for causing a computer to execute each means of the imaging apparatus according to claim 1, 12 or 16.

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