Display device, imaging prevention device, display method, and program

Abstract

To provide a display device, an imaging prevention device, a display method, and a program for suppressing imaging of an image displayed on a screen.SOLUTION: A display device includes: a display unit that displays an image on a screen; an imaging unit that images an area where the image can be seen; an acquisition unit that acquires the captured image captured by the imaging unit; a first determination unit that determines, on the basis of the captured image, whether another imaging device is capturing the image of the screen; and a processing unit that performs predetermined processing when the first determination unit determines that another imaging device is capturing the image of the screen.SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] Systems that restrict the viewing of files are known (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-162055 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the system described in Patent Document 1, it is difficult to prevent a malicious person, including an authorized user, from stealing an image displayed on the screen by pointing an imaging device at the screen and capturing an image of the screen while an authorized user is viewing a file.

[0005] An object of the present invention is to provide a display device, an image capture prevention device, a display method, and a program that can prevent others from capturing an image displayed on a screen. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems and achieve the object, the display device of the present invention comprises a display unit that displays an image on a screen, an imaging unit that images an area in which the screen is visible, an acquisition unit that acquires the image captured by the imaging unit, a first determination unit that determines whether another imaging device is capturing the screen based on the captured image, and a processing unit that performs predetermined processing when the first determination unit determines that the other imaging device is capturing the screen.

[0007] In order to solve the above-mentioned problems and achieve the object, the imaging prevention device of the present invention comprises an acquisition unit that acquires an image of an area in which an image is displayed on a screen from which the image can be seen, a first determination unit that determines whether an imaging device is imaging the screen based on the image, and a processing unit that performs predetermined processing when the first determination unit determines that the imaging device is imaging the screen.

[0008] In order to solve the above-mentioned problems and achieve the object, the display method of the present invention includes the steps of displaying an image on a screen, capturing an image of an area where the screen is visible, acquiring the captured image captured in the capturing step, determining based on the captured image whether another imaging device is capturing the screen, and performing a predetermined process if it is determined in the determining step that the other imaging device is capturing the screen.

[0009] In order to solve the above-mentioned problems and achieve the object, the program of the present invention causes a computer to execute the steps of displaying an image on a screen, capturing an image of an area where the screen is visible, acquiring the captured image captured in the capturing step, determining based on the captured image whether another imaging device is capturing the screen, and performing a predetermined process if it is determined in the determining step that the other imaging device is capturing the screen. [Effects of the Invention]

[0010] According to the present invention, it is possible to prevent the image displayed on the screen from being captured. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a schematic diagram of a display device according to an embodiment. [Figure 2] FIG. 2 is a block diagram showing a main configuration of the display device according to the embodiment. [Figure 3] FIG. 3 is a flowchart showing an example of a processing flow by the display device. [Figure 4] FIG. 4 is a schematic diagram showing an example of a state in which the imaging device is not capturing an image of the display unit. [Figure 5] FIG. 5 is a schematic side view showing an example in which the imaging device does not capture an image of the display unit. [Figure 6] FIG. 6 is a schematic diagram showing an example of a state in which the imaging device captures an image of the display unit. [Figure 7] FIG. 7 is a schematic side view showing an example in which the display device captures an image of the display unit. [Figure 8] FIG. 8 is a schematic diagram showing an example of processing by the display device. [Figure 9] FIG. 9 is a block diagram showing the main configuration of an imaging prevention system that is a modification of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] (Embodiment) Next, embodiments of the present invention will be described in detail with reference to the drawings. Note that the present disclosure is not limited to the following detailed description of the invention (hereinafter referred to as the "embodiments"). Furthermore, the components in the following embodiments include those that can be easily imagined by a person skilled in the art, those that are substantially the same, and those that are within the so-called equivalent range.

[0013] (display device) 1 is a schematic diagram of a display device 10 according to an embodiment. The display device 10 uses an imaging device, i.e., an imaging unit 12, of the display device 10 to capture an image of an area AR in which a screen (image) displayed on a display unit 11 of the display device 10 is visible. The display device 10 is a display device that, when it determines, based on the captured image captured by the imaging unit 12, that an imaging device 100 other than the display device 10 is capturing an image of the screen of the display unit 11, performs processing to suppress capturing of the screen of the display unit 11 by the imaging device 100. In the embodiment, the visible area AR is an area in front of the display unit 11 (toward the side toward which the screen of the display unit 11 faces).

[0014] In the example of FIG. 1, the other imaging device 100 is a terminal carried by the user U, and is a smartphone, but this is merely an example and is not limited to this. The other imaging device 100 may be a mobile terminal such as a tablet terminal, or a device with an imaging function such as a camera or video camera, and may not be a terminal carried by the user U. For example, the other imaging device 100 may be fixed to a tripod or the like. Hereinafter, the other imaging device 100 will be referred to as the imaging device 100 as appropriate.

[0015] FIG. 2 is a block diagram showing the main configuration of the display device 10 of the embodiment.

[0016] The display device 10 includes a display unit 11, an imaging unit 12, a communication unit 13, a storage unit 14, and a control unit 20.

[0017] The display unit 11 displays an image on the screen based on a signal output from a display control unit 21 (described later) of the control unit 20. In the embodiment, the image is content or information viewed by the user U, and may be a document file or the like.

[0018] Display unit 11 is, for example, a display including a liquid crystal display (LCD) or an organic electroluminescence (EL) display, but these are merely examples and are not limited to these. Display device 10 may be a display installed indoors or outdoors or a display included in a mobile terminal. Display unit 11 may also be a projector, and in this case, the screen of display unit 11 refers to an area onto which light from display device 10 is projected (for example, a screen or a wall).

[0019] The imaging unit 12 captures an image of an area AR where the screen of the display unit 11 is visible. The imaging unit 12 is an imaging device built into the display device 10, for example, a built-in camera. The imaging unit 12 is not limited to being a built-in camera, and may be attached to the periphery of the display unit 11. A plurality of imaging units 12 may be arranged. The imaging unit 12 captures an image of the area AR where the screen is visible, based on a signal output from the imaging control unit 22 of the control unit 20.

[0020] The communication unit 13 is a communication unit for performing wired communication or wireless communication. The communication unit 13 performs communication using a communication method such as Wi-Fi (registered trademark) or a mobile phone line, and is connected to an intranet, the Internet, or an external device. The communication unit 13 communicates data such as video and audio with the external device. The communication unit 13 communicates data such as user information, application operation status information, and files created by the application with the external device.

[0021] The storage unit 14 stores information such as the contents of calculations performed by the control unit 20 and programs. The storage unit 14 is configured with, for example, a main storage device such as a random access memory (RAM) and a read only memory (ROM), and a storage device such as a solid state drive (SSD) or a hard disk drive (HDD). The storage unit 14 stores images and videos captured by the imaging unit 12. The storage unit 14 stores a log indicating that the imaging device 100 has captured an image of the screen of the display unit 11. The log may include the time when the imaging device 100 was pointed at the screen of the display unit 11.

[0022] The control unit 20 controls each unit of the display device 10. The control unit 20 has, for example, a control device such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit), and a storage device such as a RAM or a ROM. The control unit 20 executes a program that controls the operation of the display device 10. The control unit 20 may be realized by an integrated circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array). The control unit 20 loads the stored program into memory and executes instructions included in the program. The control unit 20 includes an internal memory such as the RAM described above, and the internal memory is used for temporary storage of data in the control unit 20, etc. The control unit 20 may be realized by a combination of hardware and software.

[0023] The control unit 20 includes a display control unit 21, an imaging control unit 22, an acquisition unit 23, a first determination unit 24, a second determination unit 25, and a processing unit 26. The control unit 20 implements the display control unit 21, the imaging control unit 22, the acquisition unit 23, the first determination unit 24, the second determination unit 25, and the processing unit 26 by reading and executing a program (software) from the storage unit 14. The control unit 20 may implement these processes using a single CPU, or may be provided with multiple CPUs and implement the processes using the multiple CPUs. Furthermore, at least some of the display control unit 21, the imaging control unit 22, the acquisition unit 23, the first determination unit 24, the second determination unit 25, and the processing unit 26 may be implemented using hardware.

[0024] The display control unit 21 controls the display of an image on the screen of the display unit 11. The display control unit 21 displays an image on the screen of the display unit 11. The display control unit 21 also stops the display of an image displayed on the screen of the display unit 11. For example, when the user U attempts to capture an image of the display unit 11 with the imaging device 100, the display control unit 21 stops the display of the image displayed on the display unit 11.

[0025] The imaging control unit 22 controls the imaging unit 12. The imaging control unit 22 controls the imaging unit 12 to capture an image. The imaging control unit 22 controls the imaging unit 12 to continuously capture an image, or controls the imaging unit 12 to capture an image temporarily. In other words, the imaging control unit 22 may control the imaging unit 12 to continuously capture an image of the area AR. Furthermore, the imaging control unit 22 may control the imaging unit 12 to capture an image of the area AR only while a screen is displayed on the display unit 11, and not to capture an image of the area AR while a screen is not displayed on the display unit 11.

[0026] The acquisition unit 23 acquires the captured image of the area AR captured by the imaging unit 12.

[0027] The first determination unit 24 determines, based on the captured image, whether the imaging device 100 is capturing an image of the screen of the display unit 11. The determination process of the first determination unit 24 will be described later.

[0028] The second determination unit 25 determines the display image displayed on the display unit 11. The determination process of the second determination unit 25 will be described later. Note that the second determination unit 25 does not necessarily have to be provided.

[0029] The processing unit 26 performs a predetermined process when the first determination unit 24 determines that the imaging device 100 is capturing an image of the screen of the display unit 11. The processing unit 26 varies the process based on the image displayed on the display unit 11. The process of the processing unit 26 will be described later.

[0030] (Display Device Processing) Next, an example of processing by the display device 10 will be described with reference to Figs. 3 to 9. Fig. 3 is a flowchart showing an example of the flow of processing by the display device 10. Fig. 4 is a schematic diagram showing an example of a state in which the imaging device 100 is not capturing an image of the display unit 11. Fig. 5 is a schematic side view showing an example of a state in which the imaging device 100 is not capturing an image of the display unit 11. Fig. 6 is a schematic side view showing an example of a state in which the imaging device 100 is capturing an image of the display unit 11. Fig. 7 is a schematic side view showing an example of the display device 10 capturing an image of the display unit 11. Fig. 8 is a schematic diagram showing an example of processing by the display device 10.

[0031] As shown in FIG. 3, the display control unit 21 causes an image to be displayed on the screen of the display unit 11 (step S1).

[0032] The imaging control unit 22 causes the imaging unit 12 to capture an image of the area AR (step S2).

[0033] The acquisition unit 23 acquires the captured image of the area AR captured by the imaging unit 12 (step S3).

[0034] The first determination unit 24 determines, based on the captured image of the area AR, whether the imaging device 100 is capturing an image of the screen of the display unit 11. Specifically, the first determination unit 24 determines, based on the captured image of the area AR, whether the imaging device 100 is facing the screen of the display unit 11 (step S4). That is, when the imaging device 100 is facing the screen of the display unit 11, the first determination unit 24 determines that the imaging device 100 is capturing an image of the screen of the display unit 11, and when the imaging device 100 is not facing the screen of the display unit 11, the first determination unit 24 determines that the imaging device 100 is not capturing an image of the screen of the display unit 11.

[0035] The determination made by the first determination unit 24 will be specifically described below.

[0036] The first determination unit 24 determines whether the imaging device 100 is present in the area AR from the captured image acquired by the acquisition unit 23. If the imaging device 100 is captured in the captured image, the first determination unit 24 determines that the imaging device 100 is present in the area AR, and if the imaging device 100 is not captured in the captured image, the first determination unit 24 determines that the imaging device 100 is not present in the area AR. The first determination unit 24 may determine whether the imaging device 100 is captured in the captured image using any method. For example, the first determination unit 24 may identify objects captured in the captured image by image analysis, and if the objects captured in the captured image include an imaging device, determine that the imaging device 100 is captured in the captured image (i.e., the imaging device 100 is present in the area AR).

[0037] When the imaging device 100 is present in the area AR (the imaging device 100 is shown in the captured image), the first determination unit 24 determines whether the imaging device 100 faces the screen of the display unit 11. The method for determining whether the imaging device 100 faces the screen of the display unit 11 may be any method based on the captured image, but an example in this embodiment will be described below.

[0038] In this embodiment, the first determination unit 24 determines whether the imaging device 100 faces the screen of the display unit 11 based on the shape of the lens 101 of the imaging device 100 that appears in the captured image. The lens 101 refers to the objective lens of the imaging device 100.

[0039] In this case, the first determination unit 24 identifies an object captured in the captured image by image analysis, and extracts the area in which the lens 101 of the imaging device 100 is captured as the shape of the lens 101. If the shape of the lens 101 (the area in which the lens 101 is captured) is a predetermined shape, the first determination unit 24 determines that the imaging device 100 is facing the screen of the display unit 11. On the other hand, if the shape of the lens 101 is not a predetermined shape, the first determination unit 24 determines that the imaging device 100 is not facing the screen of the display unit 11. The predetermined shape here may be set arbitrarily, but preferably refers to a shape that is close to a circle. For example, the first judgment unit 24 may calculate the circularity of the lens 101 (the area in which the lens 101 is displayed) from the shape of the lens 101, and determine that the imaging device 100 is facing the screen of the display unit 11 if the circularity is less than a predetermined threshold, and determine that the imaging device 100 is facing the screen of the display unit 11 if the circularity is greater than or equal to the predetermined threshold.

[0040] Fig. 5 shows an example in which the imaging device 100 faces downward with respect to the screen of the display unit 11 and is not capturing an image of the screen. Fig. 4 shows an example of an image of the imaging device 100 and the lens 101 that appears in a captured image when the imaging device 100 faces in the direction shown in Fig. 5. As shown in Figs. 4 and 5, when the imaging device 100 faces downward with respect to the screen of the display unit 11, the shape of the lens 101 in the captured image becomes close to an ellipse, and in such a case, the first determination unit 24 determines that the imaging device 100 is not facing the screen of the display unit 11.

[0041] Fig. 7 shows an example in which the imaging device 100 faces the screen of the display unit 11 and captures an image of the screen. Fig. 6 shows an example of an image of the imaging device 100 and the lens 101 that appears in a captured image when the imaging device 100 faces the direction shown in Fig. 7. As shown in Figs. 6 and 7, when the imaging device 100 faces the screen of the display unit 11, the shape of the lens 101 in the captured image becomes nearly circular, and in such a case, the first determination unit 24 determines that the imaging device 100 faces the screen of the display unit 11.

[0042] Note that the method for determining that the imaging device 100 faces the screen of the display unit 11 is not limited to being based on whether the shape of the lens 101 is a predetermined shape. For example, the first determination unit 24 may calculate the direction of the optical axis of the lens 101 from the shape of the lens 101, and determine that the imaging device 100 faces the screen of the display unit 11 if the optical axis passes through the screen of the display unit 11, and determine that the imaging device 100 does not face the screen of the display unit 11 if the optical axis does not pass through the screen of the display unit 11. Furthermore, for example, the first determination unit 24 may calculate the viewing angle of the lens 101 from the shape of the lens 101, and determine that the imaging device 100 faces the screen of the display unit 11 if the screen of the display unit 11 is within the viewing angle range, and determine that the imaging device 100 does not face the screen of the display unit 11 if the screen of the display unit 11 is outside the viewing angle range. The field of view refers to the imaging range of the imaging device 100. The first determination unit 24 calculates the direction in which the lens 101 is facing from the shape of the lens 101, and can calculate the optical axis and field of view from the direction in which the lens 101 is facing.

[0043] 5, the optical axis OA2 and the viewing angle AV2 of the lens 101 do not overlap with the screen of the display unit 11, so the first determination unit 24 determines that the imaging device 100 does not face the screen of the display unit 11. In the example of Fig. 7, the optical axis OA2 and the viewing angle AV2 of the lens 101 overlap with the screen of the display unit 11, so the first determination unit 24 determines that the imaging device 100 faces the screen of the display unit 11.

[0044] Returning to FIG. 3 , if the first determination unit 24 determines that the imaging device 100 is not facing the screen of the display unit 11 (step S4; No), it determines that the imaging device 100 is not capturing an image of the screen of the display unit 11 (step S5), and ends the process. That is, in this case, the processing unit 26 does not perform a predetermined process (a process for suppressing the imaging device 100 from capturing an image of the screen of the display unit 11), which will be described later. If the first determination unit 24 determines that the imaging device 100 is facing the screen (step S4; Yes), it determines whether the state in which the imaging device 100 is facing the screen continues for a predetermined time or more (step S6). That is, the first determination unit 24 determines whether the lens 101 of the imaging device 100 is maintaining a state in which it is facing the screen of the display unit 11. In the embodiment, the predetermined time is, for example, one second, but is not limited to this and may be one second or more.

[0045] If the first determination unit 24 determines that the state in which the imaging device 100 faces the screen continues for a predetermined time or more (step S6; Yes), it determines that the imaging device 100 is capturing an image of the screen (step S7), and proceeds to the processing of step S8. If the first determination unit 24 determines that the state in which the imaging device faces the screen does not continue for a predetermined time or more (step S6; No), it determines that the imaging device is not capturing an image of the screen (step S5), and ends the processing.

[0046] Note that the first determination unit 24 is not limited to determining that the imaging device 100 is not capturing an image of the screen of the display unit 11 when the state in which the imaging device 100 faces the screen of the display unit 11 has not continued for a predetermined time or more. That is, for example, even if the state in which the imaging device 100 faces the screen of the display unit 11 is less than the predetermined time, if the first determination unit 24 determines that the imaging device 100 faces the screen of the display unit 11 (i.e., if the answer is Yes in step S4), the first determination unit 24 may determine that the imaging device 100 is capturing an image of the screen of the display unit 11. Also, for example, even if the state in which the imaging device 100 faces the screen of the display unit 11 is less than the predetermined time, if the imaging device 100 repeatedly faces the screen a predetermined number of times or more, the first determination unit 24 may determine that the imaging device 100 is capturing an image of the screen of the display unit 11.

[0047] When it is determined that the imaging device 100 is capturing an image of the screen of the display unit 11, the processing unit 26 executes a predetermined process for suppressing the imaging device 100 from capturing an image of the screen of the display unit 11. When it is determined that the imaging device 100 is capturing an image of the screen of the display unit 11, the processing unit 26 varies the content of the process to be executed depending on the content of the image displayed on the screen of the display unit 11.

[0048] In this embodiment, when it is determined that the imaging device 100 is capturing an image of the screen of the display unit 11, the second determination unit 25 determines whether the display unit 11 is displaying confidential information on the screen (step S8).

[0049] 3 and 9, when the second determination unit 25 determines that the display unit 11 is displaying an image including confidential information (step S8; Yes), the processing unit 26 executes a process of stopping the display on the display unit 11 as a predetermined process (step S9). Stopping the display means making the image including confidential information displayed on the display unit 11 invisible to the user U, and examples of this include closing a file, displaying a login screen, darkening the screen by adjusting the brightness, and turning off the power of the display device 10.

[0050] For example, if the second determination unit 25 determines that the display unit 11 is displaying an image including confidential information, the processing unit 26 darkens the screen of the display unit 11 based on the signal output from the second determination unit 25. In the embodiment, as shown in FIG. 9 , if the second determination unit 25 determines that the display unit 11 is displaying employee information, the processing unit 26 turns off the power to the display device 10 based on the signal output from the second determination unit 25. Note that in the embodiment, the confidential information is employee information, but is not limited to this and may be information that must not be leaked. Furthermore, the employee information indicates personal information such as name, address, and telephone number, but is not limited to this.

[0051] If the second judgment unit 25 determines that the display unit 11 is not displaying an image containing confidential information (step S8; No), in other words, if the display unit 11 is displaying an image other than confidential information, the processing unit 26 executes a predetermined process of recording that the imaging device 100 is capturing an image of the screen of the display unit 11 (step S10).

[0052] When the second determination unit 25 determines that the imaging device 100 is displaying an image that is not confidential information on the display unit 11, the processing unit 26 records that the screen of the display unit 11 is being imaged. The processing unit 26 stores the recorded log in the storage unit 14. When recording the log, the processing unit 26 may display on the display unit 11 that the log is being recorded. Even if the display unit 11 is displaying an image that is not confidential information, the second determination unit 25 may output a signal to the processing unit 26 to cause the processing unit 26 to stop the display. The image that is not confidential information may be, but is not limited to, a search result on the Internet.

[0053] The processing performed by the processing unit 26 may be preset by an administrator. For example, the processing unit 26 may be set to stop the display of an image containing confidential information while it is being displayed and simultaneously record a log of the display being stopped. The processing unit 26 may also be set to turn off the power of the display device 10 even when an image containing non-confidential information is being displayed.

[0054] (Modification of the embodiment) Next, a modified example of the embodiment will be described. Fig. 9 is a block diagram showing the main configuration of an imaging prevention system that is a modified example of the embodiment. As shown in Fig. 9, the display device 10A differs from the embodiment in that it is separate from the imaging prevention device 30. Hereinafter, the modified example of the embodiment will be described using Fig. 9, but the same parts as in the first embodiment will be denoted by reference numerals and will not be described.

[0055] In a modified example of the embodiment, the imaging prevention system 1 includes a display device 10A and an imaging prevention device 30. The display device 10 communicates with a communication unit 50 of the imaging prevention device 30 via a communication unit 13. The control unit 60 of the imaging prevention device 30 is the same as the control unit 20 of the display device 10 of the embodiment. That is, the display device 10A communicates with the imaging prevention device 30 via the communication unit 13 and performs processing to prevent imaging based on a signal output from the imaging prevention device 30. Therefore, even if the display device 10A and the imaging prevention device 30 are separate entities, the same effects as those of the embodiment can be achieved. The imaging prevention device 30 may be, for example, an external device connected to the display device 10A or a server connected to a network.

[0056] As described above, the display device 10 of the embodiment includes the display unit 11 that displays an image on the screen, the imaging unit 12 that captures an image of the viewable area of ​​the screen, the acquisition unit 23 that acquires the captured image captured by the imaging unit 12, the first determination unit 24 that determines whether another imaging device 100 is capturing the screen based on the captured image, and the processing unit 26 that performs predetermined processing when the first determination unit 24 determines that another imaging device 100 is capturing the screen. Therefore, it is possible to prevent others from capturing the image displayed on the screen.

[0057] Furthermore, when the captured image indicates that the other imaging device 100 is facing the screen, the first determination unit 24 determines that the other imaging device 100 is capturing the screen. Therefore, even if the imaging device 100 is in front of the screen, if the imaging device 100 is not facing the screen, it can be determined that the imaging device 100 is not capturing the screen.

[0058] Furthermore, the first determination unit 24 calculates the orientation of the other imaging device 100 based on the shape of the lens 101 of the other imaging device 100 that appears in the captured image. This improves the accuracy with which the first determination unit 24 determines whether the imaging device 100 is capturing an image.

[0059] Furthermore, the first determination unit 24 determines that the imaging device 100 is capturing an image of the screen when the state in which the other imaging device 100 faces the screen continues for a predetermined time or more. Therefore, it is possible to improve the accuracy of the first determination unit 24 in determining whether the imaging device 100 is capturing an image.

[0060] Furthermore, if the state in which the other imaging device 100 faces the screen is less than a predetermined time, the first determination unit 24 determines that the imaging device 100 is not capturing an image of the screen. Therefore, it is possible to improve the accuracy of the first determination unit 24 in determining whether the imaging device 100 is capturing an image.

[0061] Furthermore, when the first determination unit 24 determines that another imaging device 100 is capturing the screen, the processing unit 26 changes the content of the predetermined process depending on the content displayed on the screen. Therefore, if no information including confidential information is displayed, the processing can be changed.

[0062] The display device 10 further includes a second determination unit 25 that determines the content of the image displayed on the screen by the display unit 11. When the second determination unit 25 determines that the screen is displaying an image containing confidential information, the processing unit 26 stops displaying the image on the screen, and when the second determination unit 25 determines that the screen is displaying an image that does not contain confidential information, the processing unit 26 records the captured image. This improves the accuracy of determining the image displayed on the display device 10. When an image containing confidential information is displayed, the screen can be dimmed and the display can be stopped, thereby preventing the image displayed on the screen from being captured. When an image that does not contain confidential information is displayed, the image is recorded, allowing operation to continue.

[0063] The imaging prevention device 30 of the embodiment includes an acquisition unit 63 that acquires a captured image of an area AR in which the screen on which an image is displayed is visible, a first determination unit 64 that determines whether the imaging device 100 is capturing the screen based on the captured image, and a processing unit 66 that performs predetermined processing when the first determination unit 64 determines that the imaging device 100 is capturing the screen. Therefore, it is possible to prevent others from capturing an image displayed on the screen.

[0064] The display method of the embodiment includes the steps of displaying an image, capturing an image of an area where the image is visible, acquiring the captured image captured in the capturing step, determining based on the captured image whether another imaging device 100 is capturing an image of a screen displaying the image, and performing a predetermined process if it is determined in the determining step that another imaging device 100 is capturing an image of the screen. Therefore, it is possible to prevent others from capturing an image displayed on the screen.

[0065] The program of the embodiment causes a computer to execute the following steps: displaying an image, capturing an image of a region where the image is visible, acquiring the captured image captured in the capturing step, determining based on the captured image whether another imaging device 100 is capturing an image of a screen displaying the image, and performing a predetermined process if it is determined in the determining step that another imaging device 100 is capturing an image of the screen. Therefore, capturing of the image displayed on the screen can be suppressed. [Explanation of symbols]

[0066] 1. Anti-photography system 10, 10A display device 11 Display section 12 Imaging unit 13 Communications Department 14 Storage section 20 Control Unit 21 Display control unit 22 Imaging control unit 23 Acquisition Department 24 1st Judgment Section 25 Second Judgment Section 26 Processing section 100 Imaging device 101 Lens AR visible area AV2 viewing angle OA2 optical axis

Claims

1. a display unit that displays an image on a screen; an imaging unit that captures an image of a viewable area of ​​the screen; an acquisition unit that acquires the captured image captured by the imaging unit; a first determination unit that determines, based on the captured image, whether another imaging device is capturing an image of the screen; a processing unit that performs a predetermined process when the first determination unit determines that the other imaging device is capturing the screen; and Equipped with Display device.

2. the first determination unit determines that the other imaging device is capturing an image of the screen when the captured image indicates that the other imaging device is facing the screen; The display device according to claim 1 .

3. the first determination unit calculates the orientation of the other imaging device based on the shape of a lens of the other imaging device shown in the captured image; The display device according to claim 2 .

4. 4. The display device according to claim 2, wherein the first determination unit determines that the other imaging device is capturing an image of the screen when a state in which the other imaging device is facing the screen continues for a predetermined time or more.

5. the first determination unit determines that the other imaging device is not capturing an image of the screen when the state in which the other imaging device is facing the screen is less than the predetermined time; The display device according to claim 4 .

6. When the first determination unit determines that the other imaging device is capturing the screen, the processing unit changes the content of the predetermined process depending on the content displayed on the screen. The display device according to claim 1 .

7. a second determination unit that determines the content of an image displayed on the screen by the display unit; The processing unit stops displaying the image on the screen when the second determination unit determines that the screen is displaying an image including confidential information, and records the captured image when the second determination unit determines that the screen is displaying an image that is not confidential information. The display device according to claim 6.

8. an acquisition unit that acquires a captured image of a viewable area of ​​a screen on which an image is displayed; a first determination unit that determines whether an imaging device is capturing an image of the screen based on the captured image; a processing unit that performs a predetermined process when the first determination unit determines that the imaging device is capturing an image of the screen; Equipped with Anti-photography device.

9. displaying an image on a screen; capturing an image of a viewable area of ​​the screen; acquiring the captured image captured in the capturing step; determining whether another imaging device is capturing an image of the screen based on the captured image; performing a predetermined process when it is determined in the determining step that the other imaging device is capturing the screen; Including, Display method.

10. displaying an image on a screen; capturing an image of a viewable area of ​​the screen; acquiring the captured image captured in the capturing step; determining whether another imaging device is capturing an image of the screen based on the captured image; performing a predetermined process when it is determined in the determining step that the other imaging device is capturing the screen; to the computer, program.

Images