High-speed camera

Abstract

The existing high-speed camera sometimes cannot carry out video recording according to the required number of image frames. The high-speed camera according to the present invention is characterized by comprising: a video memory which is divided into a plurality of segments and writes in the form of a ring buffer; a video recording unit that causes the video recording memory to perform video recording in sequence, and stops video recording when a predetermined number of image frames are recorded on the basis of the input of a trigger signal, so that the predetermined number of image frames remain in the video recording memory; a region information management unit that stores segment information on which image frame is recorded in which segment and image frame information; and an image frame management unit that acquires a predetermined number of image frames before and after the predetermined number of image frames based on the input of the trigger signal into a certain segment, on the basis of the image frame information of the segment to which the trigger signal is input and the image frame information of the other segment stored by the region information management unit, the predetermined number of image frames being before and after the predetermined number of image frames being before and after the predetermined number of image frames being before and after the predetermined number of image frames being input into the certain segment.

Description

Technical Field

[0001] The present invention relates to a high-speed camera, in particular to a high-speed camera capable of continuous video recording. Background Art

[0002] (Description of the structure of a general digital high-speed camera)

[0003] Figure 18 The structure of a general digital high-speed camera is shown. This digital high-speed camera 1 is composed of a camera body 2 and a photographic lens 3. In addition, some cameras may not have a photographic lens 3 and use other optical systems.

[0004] The camera body 2 includes an imaging unit 4, which is composed of an image sensor that sequentially exposes the image at a set exposure timing and captures the image to be captured; a recording memory 5, which is formed into a ring buffer for recording, and is composed of a DRAM or the like, for example; a recording unit 6, which sequentially records the image captured by the imaging unit 4 as an image frame of digital data to the recording memory 5, and stops recording the image to the recording memory 5 when a predetermined number of image frames are recorded by inputting a trigger signal to be described later, and stops overwriting so that the image of the predetermined image frame remains in the recording memory 5; a system control unit 7, which has a timer for managing time, a CPU, a RAM related to its operation, a ROM including software, etc., and performs various calculations and stores data or causes the above-mentioned components to perform various calculations and stores data; an image processing unit 8, which is composed of a DSP, a GPU, etc.; an input / output unit 9, which is used to input and output external signals; and a power supply unit 10, which is used to supply power to the camera body 2.

[0005] In addition, Figure 18 , the imaging unit 4, the video recording unit 6, the image processing unit 8, the input / output unit 9, the power supply unit 10, and the like are described as separate components from the system control unit 7. However, some or all of the imaging unit 4, the video recording unit 6, the image processing unit 8, the input / output unit 9, the power supply unit 10, and the like may constitute part of the system control unit 7.

[0006] (Description of the Recording Method of Recording in Recording Memory 5 by Recording Unit 6)

[0007] Regarding the above-mentioned existing digital high-speed camera that records in a memory, the above-mentioned ring-buffer-shaped video recording memory 5 is formed as follows: when image frames are written in sequence from the beginning of its storage area, and when writing to the end, the image frames are immediately overwritten in sequence from the beginning of the storage area, and this overwriting is repeated until the recording stops.

[0008] Then, for example, the recording unit 6 sequentially performs exposure at predetermined exposure timings in a ring buffer manner in the recording memory 5 , captures the images, and writes the images converted into digital data.

[0009] The recording unit 6 is provided with a recording image frame number setting unit that pre-sets the number of image frames for recording a predetermined number of image frames before and after an image frame (trigger frame) when a trigger signal is input.

[0010] Moreover, after writing a specified number of images after the trigger frame set by the recording image frame number setting unit, the recording stop unit provided in the recording unit 6 is used to stop writing (recording), thereby recording a specified number of image frames before and after the trigger frame.

[0011] Furthermore, the number of image frames preset by the recording image frame number setting unit is set to, for example, the same number as the maximum number of image frames that can be written to the entire storage area (unwritten range) of the recording memory 5 so as to effectively utilize the recording memory 5.

[0012] Furthermore, the number of image frames preset by the recorded image frame number setting unit may be smaller than the maximum number of image frames that can be written to the entire storage area (unwritten range) of the recording memory 5 .

[0013] For example, Figure 19 As shown, there is a general high-speed shooting function (hereinafter referred to as normal recording) as follows: a predetermined number of written images before and after the above-mentioned trigger signal is input (for example, 100 frames before the trigger and 100 frames after the trigger (in this example, including the trigger frame when the trigger signal is input)) are recorded as continuous image frames in the above-mentioned video recording memory 5.

[0014] In addition, regarding the expressions before trigger and after trigger, either one may include a trigger frame, or sometimes neither one includes a trigger frame and the expressions before trigger and after trigger are based on the trigger frame.

[0015] In addition, the recorded image frame number setting unit may set a predetermined number of frames before or after the trigger signal input, excluding the trigger frame, to 0.

[0016] Furthermore, in the drawings, a lightning-shaped mark indicates input of a trigger signal.

[0017] In addition, regarding the trigger signal input unit of the above-mentioned trigger signal, there is a case where, for example, the trigger signal is input from outside the camera 1 through the TRIG IN connector of the above-mentioned input and output unit 9 to the above-mentioned recording unit 6 via the circuit inside the above-mentioned camera body 2, and a case where the system control unit 7 inside the high-speed camera generates a CPU trigger signal.

[0018] There is also a configuration in which the storage area of ​​the recording memory 5 of the high-speed camera is divided into a plurality of segments (storage areas), and each of the divided segments is transferred sequentially and continuously, that is, transferred immediately and written without missing a single image frame.

[0019] That is, writing is performed in the first segment, and when the first trigger signal is input and writing stops after a predetermined number of image frames are reached, the process automatically shifts to the next segment and writing is performed immediately, thereby enabling recording based on the next trigger signal input.

[0020] Thus, a trigger signal can be input for each segment, such as Figure 20 As shown, normal recording corresponding to the number of segment divisions can be performed. In addition, continuous normal recording (hereinafter referred to as continuous recording) can be realized.

[0021] Furthermore, for example, the technology of Patent Document 1 exists as a general high-speed camera.

[0022] Prior art literature

[0023] Patent Literature

[0024] Patent Document 1: Japanese Patent No. 4657379 Summary of the Invention

[0025] However, regarding the above-mentioned existing cameras, Figure 21 As shown in the figure, after a trigger signal is input, the current clip is recorded normally until the writing of a specified frame is completed (the image frame within frame A in the figure). Therefore, even if a trigger signal is input again, recording may not be possible. As a result, the input of a trigger signal may be missed.

[0026] Furthermore, if a trigger signal is input immediately after the next segment is moved, some frames before the trigger signal input are not recorded in the next segment. Therefore, it is not possible to ensure that all the prescribed number of image frames before and after the trigger signal input are recorded.

[0027] For example, Figure 22The following figure shows image frame data obtained by recording video using the aforementioned conventional high-speed camera in response to input of various trigger signals. In this example, the same number of frames are recorded before and after the trigger signal is input. Furthermore, the video memory 5 is divided into four segments. The segments are named Segment 0, Segment 1, Segment 2, and Segment 3, respectively, and the images are written in that order. Furthermore, an example of four trigger signal inputs is shown.

[0028] also, Figure 22 The upper part of the diagram is a transition diagram showing the recording status of each segment relative to the time axis. The portion of each segment marked with a pattern indicates that it remains as a recording. In addition, the portion of each segment without a pattern indicates that it has been overwritten and the image has disappeared.

[0029] In addition, the lower row indicates the data of the image frames recorded in the above-mentioned respective segments by DATA0 to DATA3.

[0030] like Figure 22 As shown, in the conventional method, the frame data obtained by recording is consistent with the shooting scene of each segment.

[0031] First, an image is written in a ring buffer in segment 0. Then, after recording a predetermined number of frames, which is pre-set by the video frame number setting unit and follows the input of the trigger signal, based on the first trigger signal input, the video recording of segment 0 is terminated by the video recording stop unit. Furthermore, predetermined frames before and after the input of the trigger signal are recorded as DATA0.

[0032] Furthermore, since the input is during the recording of segment 0, the second input of the trigger signal is ignored.

[0033] When recording of segment 0 is completed, the image is written to the ring buffer for the next segment 1. After recording the predetermined number of frames following the input of the trigger signal in response to the third input, recording of segment 1 is completed. Furthermore, the predetermined frames before and after the input of the trigger signal are recorded as DATA1.

[0034] When the recording of the segment 1 is completed, the image is written into the next segment 2. After the predetermined number of frames after the trigger signal input is input in response to the fourth trigger signal, the recording of the segment 2 is completed.

[0035] However, the time from the start of recording of segment 2 to the input of the trigger signal is short, so the prescribed number of image frames before the input of the trigger signal are not recorded. Therefore, the image frame number is recorded as DATA2, which has a smaller number of image frames.

[0036] When the recording of the segment 2 is completed, the image is written in a ring buffer in the next segment 3. The image is written until the next trigger signal is input.

[0037] As described above, depending on the input timing of the trigger signal, the input of the trigger signal may be ignored and the video may not be recorded. In addition, regarding the number of frames before and after the trigger signal is input, the specified number of frames may not be recorded.

[0038] The present invention eliminates the above-mentioned disadvantages.

[0039] The high-speed camera of the present invention is characterized in that it includes: an imaging unit that sequentially captures an image to be a subject at a set exposure timing; a video memory that is divided into a plurality of segments, sequentially and continuously transferred to each segment for writing, and writes and rewrites in the form of a ring buffer until writing is stopped for each segment; a video recording unit that causes the video recording memory to sequentially record the images captured by the imaging unit as image frames of digital data, and stops recording the video to the video recording memory by using a video stopping unit based on an input of a trigger signal when a specified number of image frames set by the video stopping unit are recorded, thereby stopping the specified number of image frames from being recorded. the image frame remains in the above-mentioned video recording memory; a video recording image frame number setting unit, which pre-sets a specified number of image frames before and after the image frame when the trigger signal is input, which should be recorded based on the input of the above-mentioned trigger signal; an area information management unit, which stores the segment information and image frame information of which image frame is recorded in which segment; and an image frame management unit, which obtains the specified number of image frames before and after, which is set based on the image frame when the trigger signal is input in a certain segment, based on the image frame information of the segment to which the trigger signal is input and the image frame information of other segments stored by the above-mentioned area information management unit.

[0040] In addition, it is characterized in that the above-mentioned image frame information is the position of the image frame within each segment, and the above-mentioned area information management unit is configured to store the position within the segment of each image frame recorded in the segment after the recording is stopped for each segment. The above-mentioned image frame management unit is configured to: in order to obtain a specified number of image frames before and after the trigger frame set based on the input trigger signal, which is pre-set by the above-mentioned recording image frame number setting unit, the position of each image frame within the segment to which the above-mentioned trigger signal is input is supplemented from the position of each image frame in other segments.

[0041] In addition, it is characterized in that a serial number management unit is provided, which sequentially assigns serial numbers to each image frame recorded in sequence in the above-mentioned segments that are continuously transferred and recorded in sequence, and the above-mentioned image frame information is a serial number assigned to each of the above-mentioned segments by the above-mentioned serial number management unit. The above-mentioned area information management unit is configured to: for each of each segment, store the serial numbers of each image frame recorded in the segment after the recording is stopped, and the above-mentioned image frame management unit is configured to: in order to obtain a specified number of image frames before and after the trigger frame set in advance by the above-mentioned recording image frame number setting unit based on the trigger frame when the trigger signal is input, for the serial numbers of each image frame of the segment to which the above-mentioned trigger signal is input stored by the above-mentioned area information management unit, supplement the serial numbers of the image frames of the segment that cannot be recorded by the segment of the above-mentioned trigger frame from the serial numbers of each image frame of other segments.

[0042] Furthermore, the present invention is characterized in that when a trigger signal is repeatedly input in each segment and the video is continuously transferred to the next segment, the video recording unit is provided with an analog trigger signal input unit for issuing an analog trigger signal.

[0043] In addition, it is characterized in that the above-mentioned analog trigger signal input unit includes: a delay management unit, which forms a delay state when the initial trigger signal is input in each segment, and eliminates the above-mentioned delay state when the recording of the segment in the current recording stops; and a repetition management unit, which forms a repetition state when a new trigger signal is input in the above-mentioned delay state, inputs an analog trigger signal to the above-mentioned recording unit when the recording of the segment in the current recording stops and continuously transfers to the next segment for recording, and eliminates the repetition state when the analog trigger signal is input.

[0044] Furthermore, the predetermined number of image frames set by the recording stop unit is set to a predetermined number of image frames after the image frame at the time of input of the trigger signal, which is preset by the recorded image frame number setting unit.

[0045] In addition, it is characterized in that a determination unit is provided in the above-mentioned recording stop unit, which determines whether there is an unrecorded area in the segment when the above-mentioned specified number of image frames set by the recording stop unit are recorded in the segment. When the determination unit determines that there is no unrecorded area, the above-mentioned recording stop unit is set to stop recording when the specified number of image frames set by the above-mentioned recording stop unit are recorded. When it is determined that there is an unrecorded area, the above-mentioned recording stop unit is set to stop recording until the above-mentioned unrecorded area is written.

[0046] Furthermore, the present invention is characterized in that the analog trigger signal input unit is provided with an analog trigger signal input determination unit for determining whether to input the analog trigger signal to the next segment or not.

[0047] In addition, it is characterized in that a determination unit is provided in the above-mentioned video recording stop unit, which determines whether there is an unrecorded area in the segment when the above-mentioned specified number of image frames set by the video recording stop unit are recorded in the segment. When the determination unit determines that there is no unrecorded area, the above-mentioned video recording stop unit is set to stop recording when the specified number of image frames set by the video recording stop unit are recorded. When it is determined that there is an unrecorded area, the above-mentioned video recording stop unit is set to stop recording until the above-mentioned unrecorded area is written. The above-mentioned analog trigger signal input unit is provided with an analog trigger signal input determination unit for determining whether to input the analog trigger signal into the next segment or not.

[0048] Effects of the Invention

[0049] According to the high-speed camera of the present invention, at any trigger signal input timing, a predetermined number of image frames before and after the trigger signal input can be recorded. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a structural diagram of a high-speed camera according to an embodiment of the present invention.

[0051] Figure 2 This is an explanatory diagram for explaining the first embodiment of the present invention based on the positions of segments.

[0052] Figure 3 This is an explanatory diagram for explaining the first embodiment of the present invention based on the positions of segments.

[0053] Figure 4 This is an explanatory diagram for explaining the first embodiment of the present invention based on the positions of segments.

[0054] Figure 5 This is an explanatory diagram for explaining the first embodiment of the present invention based on the positions of segments.

[0055] Figure 6 This is an explanatory diagram for explaining the first embodiment of the present invention based on the positions of segments.

[0056] Figure 7 This is an explanatory diagram for explaining the first embodiment of the present invention based on serial numbers.

[0057] Figure 8 This is an explanatory diagram for explaining the first embodiment of the present invention based on serial numbers.

[0058] Figure 9 This is an explanatory diagram for explaining the first embodiment of the present invention based on serial numbers.

[0059] Figure 10 This is an explanatory diagram for explaining the first embodiment of the present invention based on serial numbers.

[0060] Figure 11 This is an explanatory diagram for explaining the first embodiment of the present invention based on serial numbers.

[0061] Figure 12 This is an explanatory diagram for explaining the first embodiment of the present invention based on serial numbers.

[0062] Figure 13 This is a transition diagram of the recording operation of recording each segment based on the input of a trigger signal in the novel method 1 of the embodiment 1 of the present invention.

[0063] Figure 14 This is an explanatory diagram for explaining the second embodiment of the present invention based on the positions of segments.

[0064] Figure 15 This is an explanatory diagram for explaining the second embodiment of the present invention based on the serial numbers.

[0065] Figure 16 This is an explanatory diagram for explaining the second embodiment of the present invention based on the serial numbers.

[0066] Figure 17 This is a transition diagram of the recording operation of recording each segment based on the input of a trigger signal in the new method 2 of the second embodiment of the present invention.

[0067] Figure 18 It is a structural diagram of a high-speed camera involved in a conventional embodiment.

[0068] Figure 19 It is an explanatory diagram showing a recording state of an image frame when a trigger signal is input.

[0069] Figure 20 This is an explanatory diagram showing a recording state when the memory is divided into four segments.

[0070] Figure 21 This is an explanatory diagram of a case where a new trigger signal is input during an existing recording state.

[0071] Figure 22 This is a transition diagram of the conventional recording operation of recording each segment based on the input of a trigger signal.

[0072] Description of Reference Numerals

[0073] 1 High-speed camera

[0074] 2 Camera body

[0075] 3 Camera lens

[0076] 4 Imaging Department

[0077] 5 Video storage

[0078] 6 Video Department

[0079] 7 System Control Unit

[0080] 8 Image Processing Unit

[0081] 9 Input and output section

[0082] 10 Power supply unit

[0083] 11 Regional Information Management Unit

[0084] 12 Image frame management unit

[0085] 13 Analog trigger signal input unit

[0086] 13a Delay Management Unit

[0087] 13b Repeating Snap-in DETAILED DESCRIPTION

[0088] Hereinafter, preferred embodiments of the high-speed camera of the present invention will be described with reference to the accompanying drawings. The high-speed camera of the present invention is not limited to the following description, and can be modified appropriately within the scope of the present invention.

[0089] In addition, the same reference numerals are given to the same parts as those in the above-mentioned conventional example, and the description thereof will be omitted.

[0090] Example 1

[0091] Figure 1 The configuration of a high-speed camera according to one embodiment of the present invention will be described.

[0092] (Description of the overall structure of the present invention)

[0093] In the present invention, regarding the conventional high-speed camera 1, the storage area of ​​the recording memory 5 is divided into a plurality of segments (storage areas), and writing is performed sequentially and continuously (ie, immediately transferred without missing a single image frame) in each of the divided segments.

[0094] Furthermore, for example, the system control unit 7 is provided with a region information management unit 11 that stores segment information indicating which image frame is recorded in which segment and image frame information.

[0095] In addition, for example, the system control unit 7 is provided with the following image frame management unit 12, which obtains the above-mentioned predetermined number of image frames before and after the image frame (trigger frame) that should be recorded based on the image frame information of the segment in which the trigger signal is input and the image frame information of other segments stored by the area information management unit 11.

[0096] That is, when only the segment with the trigger signal is input and the specified number of all image frames based on the trigger frame with the trigger signal is not obtained, the above-mentioned image frame management unit 12 is used to supplement the required image frames from the adjacent segments, so that the required specified number of all image frames can be obtained every time each trigger signal is input.

[0097] Conventionally, required image frames to be recorded based on the input of the trigger signal are acquired for each segment to which a trigger signal is input. Therefore, predetermined image frames are not recorded depending on the input of the trigger signal, and all required image frames cannot be recorded.

[0098] That is, for example, when a trigger signal is input immediately after transitioning to the next segment, a predetermined number of image frames preceding the image frame for which the trigger signal is input are not recorded in the next segment, so that only some image frames may be recorded.

[0099] Therefore, the above-mentioned image frame management unit 12 is set in the present invention. Based on the image frame information of the segment with the trigger signal input, the required image frame information is supplemented according to the image frame information recorded in other segments before and after. Based on the above-mentioned image frame information, the required number of image frames can be obtained whenever the trigger signal is input.

[0100] In the present invention, the image frame management unit 12 is provided, and therefore, a required number of all image frames corresponding to the trigger signal can be recorded.

[0101] (Example of segment information of the above-mentioned region information management unit 11)

[0102] Furthermore, the clip information of the region information management unit 11 includes, for example, the position (storage address) of each clip in the recording memory 5 , the recording order of each clip, and an identification name set for each clip.

[0103] Then, the region information management unit 11 stores the segment information of each segment divided.

[0104] (Example of Image Frame Information of the Region Information Management Unit 11)

[0105] Furthermore, the image frame information of the region information management unit 11 includes, for example, the position of each image frame within each segment.

[0106] Then, the region information management unit 11 stores image frame information of each necessary image frame recorded in each segment.

[0107] In the case of this example, in order to obtain the predetermined number of image frames before and after the trigger frame set based on the input trigger signal, the image frame management unit 12 is used to supplement the positions of the image frames that cannot be stored in the above segment from the positions of the image frames in other segments with respect to the positions of the image frames in the segment in which the trigger signal is input and stored by the above area information management unit 11, thereby obtaining the required number of image frames.

[0108] (Other Examples of the Aforesaid Area Information Management Unit 11)

[0109] In addition, as the above-mentioned image frame information, instead of using the position within each segment, a serial number management unit can be provided in each of the above-mentioned segments to sequentially assign serial numbers to each image frame recorded in sequence, and the serial number stored for each of the above-mentioned segments can be used.

[0110] Then, the region information management unit 11 stores image frame information of each necessary image frame recorded in each segment.

[0111] In the case of this other example, in order to obtain the specified number of image frames before and after the above-mentioned pre-set trigger frame set based on the trigger frame when the trigger signal is input, the above-mentioned image frame management unit 12 is used to supplement the serial numbers of each image frame of the segment in which the above-mentioned trigger signal is input with the serial numbers of each image frame of other segments to obtain the required number of image frames.

[0112] (Description of Analog Trigger Signal Input Unit 13)

[0113] Furthermore, the system control unit 7 is further provided with an analog trigger signal input unit 13 that repeatedly issues a trigger signal to the recording unit 6 in each segment and inputs an analog trigger signal to the recording unit when transitioning to the next segment.

[0114] The analog trigger signal input unit 13 includes, for example: a delay management unit 13a, which forms a delay state when the initial trigger signal is input in each segment, and eliminates the above-mentioned delay state when the recording of the segment in the current recording stops; and a repetition management unit 13b, which forms a repetition state when a new trigger signal is input in the above-mentioned delay state, inputs an analog trigger signal to the above-mentioned recording unit 6 when the recording of the segment in the current recording stops and continuously transfers to the recording of the next segment, and eliminates the repetition state when the analog trigger signal is input.

[0115] Conventionally, when trigger signals are repeatedly input to the same segment, the recording of the segment ends after the recording stop unit ends a predetermined number of image frames based on the input of the initial trigger signal, and recording of the next segment begins.

[0116] At this time, since the recording of the above-mentioned segment is completed, the required number of image frames based on the subsequent input of the trigger signal does not remain in the above-mentioned segment.

[0117] Furthermore, if a trigger signal is not input in the next segment after the start of recording, the recording is overwritten in a ring buffer, and a necessary image frame based on the input of the subsequent trigger signal cannot remain.

[0118] Therefore, in the present invention, when there are repeated trigger signals in each segment, when starting to record the next segment, an analog trigger signal is input to the next segment. After recording a specified number of times pre-set by the above-mentioned recording image frame number setting unit, the recording is stopped by the above-mentioned recording stop unit without rewriting, so that the required number of image frames based on the subsequent trigger signal can be recorded.

[0119] That is, in the recording of a certain segment, when the initial trigger signal is input into the above-mentioned recording unit 6, when the recording of the number of image frames set in the above-mentioned recording image frame number setting unit is completed based on the input of the initial trigger signal, the writing of the above-mentioned certain segment is completed, the rewriting of the above-mentioned certain segment is stopped, and the recording of the next segment is started immediately.

[0120] Then, a predetermined number of image frames are recorded in the aforementioned certain segment based on the initial trigger signal. In addition, the image frames are managed and recorded by the aforementioned region information management unit 11 based on their positions and sequence numbers within the segment.

[0121] Furthermore, the delay management unit 13 a enters a delay state in response to the input of the first trigger signal, and this delay state is eliminated when the writing is performed in the next segment.

[0122] In addition, when a new trigger signal is input in the above-mentioned delayed state, the above-mentioned repetition management unit 13b is used to input an analog trigger signal to the above-mentioned recording unit 6 when transferring to the next segment. After the writing of the specified number of image frames is completed, the writing is stopped and the rewriting of the above-mentioned next segment is stopped.

[0123] Then, the image frame management unit 12 manages necessary image frames based on the image frame information of the segment when the new trigger signal is input and the image frame information of the next segment.

[0124] Then, by stopping the rewriting of the next segment, writing of the next segment is started.

[0125] In addition, when the above-mentioned new trigger signal is input, the number of image frames for stopping the writing of the above-mentioned certain segment has been set using the above-mentioned image stop unit based on the initial trigger signal. Therefore, the effectiveness of the above-mentioned new trigger signal for stopping the recording of the above-mentioned certain segment is ignored.

[0126] In the next segment, the analog trigger signal is input and the delay management unit 13 a causes the delay state, and the delay state is eliminated when the next segment is shifted to write.

[0127] Then, in the subsequent segments, writing is performed until a trigger signal is input, and when a trigger signal is input, the above steps are repeatedly executed.

[0128] In addition, for example, it can also be formed as follows: in the recording stop section of the above-mentioned recording section 6, when the above-mentioned repetition management unit 13b is used to transfer to the next segment for recording, with respect to the input analog trigger signal, instead of stopping the recording after recording the number of image frames set in the above-mentioned recording image frame number setting section in the next segment, the recording is stopped after recording only the number of image frames that are insufficient for the image frames recorded in the segment in which the trigger signal is input.

[0129] That is, it can also be formed as follows: in the above-mentioned recording stop section, after recording in the next segment, the number of image frames obtained by subtracting the number of image frames in the above-mentioned segment from the image frame in which the above-mentioned new trigger signal is input to the image frame at the end of recording is obtained from the number set in the above-mentioned recording image frame number setting section, the recording is stopped.

[0130] In addition, in the case as described above, the state in which an area that has not been recorded (an area in which recording has not been completed) remains in the segment is maintained. When transferring to the next segment, the area in which recording has not been completed of the above-mentioned next segment is subdivided into one or more segments in such a manner that the above-mentioned stop point becomes the starting point of the new segment, and the soldier immediately transfers to each subdivided segment obtained by the subdivision in sequence for writing, and further continuously transfers to the next segment.

[0131] In this case, the unrecorded area can be eliminated, and thus the recording memory 5 can be effectively utilized.

[0132] Then, a required number of image frames before and after the trigger frame of the input trigger signal set in the recording image frame number setting unit are recorded.

[0133] (Description of the Case Where Image Frame Information is Placed Within a Segment in Embodiment 1 of the Present Invention)

[0134] Next, the first embodiment of the present invention will be described in the case where image frame information is located within a segment.

[0135] The recording memory 5 is divided into three segments, "A," "B," and "C," for example, and recording is started continuously in the order of "A," "B," and "C." Each segment is set as a ring buffer for 10 image frames. The recording image frame number setting unit described above records the image frame to which a trigger signal is input (the trigger frame), as well as the four frames following it and the five frames preceding it (hereinafter referred to as the 10 frames around the trigger frame).

[0136] Furthermore, the recording stop unit is configured to stop recording and move to the next segment when four frames, which is the number preset by the recorded image frame number setting unit, are advanced from the image frame after a trigger signal is input.

[0137] The final segment includes the case where the video is transferred to the first segment and the case where the video recording is stopped at this point.

[0138] First, if Figure 2 As shown, in segment "A", recording is started by sequentially writing the captured image frames into the 10 image frame areas [A0] to [A9] on the recording memory in a ring buffer.

[0139] Furthermore, in the above-mentioned segment A, the captured image frames are sequentially rewritten.

[0140] In addition, Figures 2 to 6 In FIG, the upper part shows the position of the image frame area in each segment, and the lower part shows the recording state. In addition, [oo] indicates the state in which the recording has been rewritten.

[0141] Moreover, in Figure 3 , an example of the following situation is shown: for example, in segment A, the initial trigger signal is input when the image frame is written to the image frame area [A8], and a new trigger signal is input when the image frame is written to the subsequent image frame area [A1].

[0142] In addition, <> indicates that there is a trigger signal input.

[0143] also, Figures 3 to 5 The numbers in the lower row in represent the order of the image frames recorded before and after the trigger frame set by the recorded image frame number setting unit.

[0144] like Figure 3 As shown, in image frame area [A8], at the time the initial trigger signal is input, after image frames are written into the four image frame areas [A9], [A0], [A1], and [A2] set by the recording stop unit, writing stops in image frame area [A2]. Furthermore, in segment A, the required image frames remain in image frame areas [A3], [A4], [A5], [A6], [A7], [A8], [A9], [A0], [A1], and [A2] based on the initial trigger signal.

[0145] also, Figure 4 The positions of image frame regions corresponding to recorded image frames are shown when the images are represented in time series.

[0146] Then, immediately after the writing of the above-mentioned segment A is stopped, the writing of the next segment B is started.

[0147] Here, conventionally, a new trigger signal input at the time point of the image frame region [A1] is ignored because the segment A is being recorded.

[0148] In addition, even if a new trigger signal is received, writing to the image frame area [A2] for recording of segment A is stopped. Therefore, in segment A, up to the image frame areas [A6], [A7], [A8], [A9], [A0], [A1], and [A2], even if recording is performed in segment A, the trigger signal is not input to segment B. Therefore, rewriting is performed in the form of a ring buffer, and image frames corresponding to the required image frame areas [B0], [B1], and [B2] based on the input of the new trigger signal cannot remain.

[0149] Therefore, in the present invention, when a second trigger signal is input in segment A and the segment A becomes a repeat state, as shown in FIG. Figure 5As shown, in the initial image frame area [B0] of segment B, the analog trigger signal is automatically input from the analog trigger signal input unit 13 to the recording unit. After recording the specified number of image frames, the writing of segment B is stopped and no rewriting is performed.

[0150] In addition, in the above Figure 5 In FIG. 1 , [xx] in segment B indicates that no image is input to memories [B5] to [B9].

[0151] In addition, regarding the above-mentioned analog trigger, for example, the recording stop portion stops writing at a set number of image frames (for example, 5 frames including the end of the trigger signal) according to the same rule as the normal trigger, and after writing to the image frame area [B4], as shown in FIG. Figure 6 As shown, writing of segment "C" begins.

[0152] (Description of the Case Where Image Frame Information is Set as a Sequence Number in Embodiment 1 of the Present Invention)

[0153] Next, the first embodiment of the present invention will be described, assuming that the image frame information is a serial number.

[0154] The recording memory is divided into three segments, "A," "B," and "C," for example. Recording is started continuously in the order of "A," "B," and "C." Each segment is set as a ring buffer for 10 image frames. The recording frame number setting unit records the image frame to which a trigger signal is input (the trigger frame), along with the four frames following it and the five frames preceding it (hereinafter referred to as the 10 frames around the trigger frame).

[0155] Furthermore, the recording stop unit is configured to stop recording and immediately move to the next segment when four frames, which is the number preset by the recorded image frame number setting unit, are advanced from the image frame after a trigger signal is input.

[0156] The final segment includes the case where the video is transferred to the first segment and the case where the video recording is stopped at this point.

[0157] First, if Figure 7 As shown, in segment "A", recording is started by sequentially writing the captured image frames into the 10 image frame areas [A0] to [A9] on the recording memory in a ring buffer.

[0158] Furthermore, the serial number management unit is used to sequentially assign serial numbers of

[00]

[01]

[02] ... to the captured image frames.

[0159] Furthermore, in the segment A, the captured image frames are sequentially overwritten and written.

[0160] Moreover, in Figure 7 The following example is shown: the serial number of the third week is recorded in the ring buffer <28> and the fourth week <31> The trigger signal is input to the image frame corresponding to the serial number at the timing.

[0161] In the serial number <28> At the time point when the trigger signal is input, the recording advances by 4 image frames set by the recording stop unit and stops writing at the sequence number

[32] . Moreover, the image frames corresponding to the sequence numbers

[23] to

[32] remain in the segment A.

[0162] Furthermore, as the configuration of the memory of the above segment A, as Figure 8 As shown, image frames corresponding to a series of serial numbers remain.

[0163] in addition, Figure 9 A series of serial numbers corresponding to recorded image frames when represented in time series are shown.

[0164] Furthermore, after the writing of the above segment A is stopped, the writing of the next segment B is started, and the above sequence number management unit is used as shown in FIG. Figure 10 As shown, the captured image frames are numbered

[33]

[34]

[35] ... in sequence.

[0165] Here, in the past, about the serial number <31> The new trigger signal input at the time point is ignored because it is in the video of segment A.

[0166] Furthermore, even if a new trigger signal is received and recording is performed in segment A up to sequence numbers

[26] to

[32] in the required series of sequence numbers

[26] to

[35] , the trigger signal is not input to segment B. Therefore, if Figure 5 As shown, the image frames corresponding to serial numbers

[33] to

[35] cannot remain by rewriting in a circular buffer.

[0167] Therefore, in the present invention, when the second trigger signal is input to segment A and the segment A enters the repeat state, the first frame of segment B <33> The analog trigger signal input unit 13 automatically inputs an analog trigger signal to the recording unit to stop writing the segment B. Figure 11 As shown, no rewriting is performed.

[0168] In addition, in the above Figure 11 In FIG. 1 , [xx] in segment B indicates that no image is input to memories [B5] to [B9].

[0169] In addition, regarding the analog trigger <33> , with the usual trigger <28> The same rule is used to stop writing in the above-mentioned video stop section according to the set number of image frames (for example, the number of frames including the end of the trigger signal is 5 frames). After writing to

[37] , as shown in FIG. Figure 12 As shown, writing of segment "C" begins.

[0170] (Description of Embodiment 1 of the Present Invention Based on Frame Data)

[0171] Figure 13 This figure shows the image frame data recorded in each segment when each trigger signal is input to each segment according to the novel method of Example 1 of the present invention. This figure specifically describes the recording operation based on the input of the trigger signal for each segment.

[0172] First, an example is shown: Setting the recording time to the same number of frames before and after a trigger signal is input, the clip is divided into four segments, and the trigger signal is input four times. Furthermore, for segments 0 through 3, the portion marked with a pattern indicates that the recording memory remains during the recording period, while the portion without a pattern indicates that it has been overwritten and lost. Furthermore, Data 0 through Data 3 represent the image frame data managed as the captured scene.

[0173] like Figure 13 As shown, in the new method, the segments and shooting scenes do not have to be consistent.

[0174] First, an image is written to a ring buffer in segment 0. The first trigger signal input is a trigger frame for data 0. After recording a predetermined number of frames following the first trigger signal input, recording of segment 0 ends, switching to segment 1, and writing to that segment.

[0175] Then, regarding the image frames based on the first trigger signal, the image frame management unit 12 records as data 0 image frames corresponding to the required number of image frame information set in advance by the recorded image frame number setting unit.

[0176] Furthermore, after the first trigger signal is input, the recording of the current segment 0 is brought into a delayed state by the delay management unit 13 a .

[0177] Moreover, regarding the input of the second trigger signal, it is input in the recording of segment 0 after the input of the first trigger signal (delayed state), and therefore, the above-mentioned repetition management unit 13b judges it as a repetition state, stops the recording of the above-mentioned segment 0, and when transferring to the next segment 1 for writing, the analog trigger signal is input to the next segment 1.

[0178] Furthermore, the delay state caused by the first input of the trigger signal is shifted to the next segment and eliminated.

[0179] Furthermore, the aforementioned repeated state is also eliminated by inputting a simulation trigger in the next segment.

[0180] In addition, in the next segment 1, since the analog trigger signal is input, the delay management unit 13a puts the segment into a delayed state.

[0181] Then, after recording the next segment 1 for a predetermined number of image frames set by the recording stop unit based on the analog trigger signal, recording is stopped and the process shifts to the next segment 2, and writing is performed on the next segment 2 in a ring buffer.

[0182] Then, regarding the image frames based on the second trigger signal, the image frame management unit 12 records image frames corresponding to a required number of image frame information as data 1 .

[0183] In this case, the image frames of segment 1 alone are insufficient, so the image frames recorded in segment 0 are added to create data 1.

[0184] Furthermore, regarding the delay state caused by the input of the analog trigger signal, the process shifts to the next segment 2 and the delay state is eliminated.

[0185] Moreover, in the above-mentioned next segment 2 written in the form of a ring buffer, it is not in a repeated state when the third trigger signal is input. Therefore, as usual, the recording is stopped after recording the specified number of image frames set by the above-mentioned recording stop unit, and further transferred to the next segment 3 and written in the next segment 3.

[0186] Then, regarding the image frames based on the third trigger signal, the image frame management unit 12 records image frames corresponding to a required number of image frame information as data 2 .

[0187] Furthermore, the image frames based on the third trigger signal are composed only of the image frames recorded in the segment 2 .

[0188] Furthermore, in response to the third trigger signal input, the delay management unit 13 a enters the delay state in the segment 2 .

[0189] However, the delay state is resolved by transitioning to the next segment 3.

[0190] Furthermore, when the fourth trigger signal is input in the segment 3, the repeat state is not in progress, and therefore, the recording is stopped after recording for the predetermined number of image frames set by the recording stop unit as usual.

[0191] Alternatively, writing to the segment may be terminated at the same time as writing to segment 3 is terminated, and writing to segment 0 may be started.

[0192] Then, regarding the image frames based on the fourth trigger signal, the image frame management unit 12 records image frames corresponding to a required number of image frame information as data 3 .

[0193] In this case, the image frames of segment 3 alone are insufficient, so the image frames recorded in segment 2 are added to create data 3.

[0194] In addition, according to the fourth trigger signal input, the delay management unit 13a is used in the above-mentioned segment 3 to change to a delay state, and then, when a new trigger signal is input, the repetition management unit 13b is used to change to a repetition state. In addition, if it is transferred to the next segment, the delay state is eliminated.

[0195] According to the present invention, no image frame remains for each trigger signal input.

[0196] Example 2

[0197] The first embodiment described above shows an example of a case where, after recording a predetermined number of image frames set by the recording stop unit in each segment, recording is stopped and writing is performed on the next segment.

[0198] In the second embodiment, in each segment, for example, the video recording stop unit of the video recording unit 6 is provided with the following determination unit: when recording the above-mentioned specified number of image frames set by the video recording stop unit in the segment, it is determined whether there is an unrecorded area (unfinished recording area) in the segment, and when it is determined by the determination unit that there is no unfinished recording area, the video recording stop unit stops recording when the above-mentioned predetermined number of image frames are recorded. In addition, when it is determined that there is an unfinished recording area, the video recording stop unit stops recording until the above-mentioned unfinished recording area is written, that is, after recording the maximum image frame that can be recorded in the segment within the range that is not overwritten.

[0199] In this case, the unrecorded area can be eliminated, and thus the recording memory 5 can be effectively utilized.

[0200] Then, a required number of image frames before and after the trigger frame to which the trigger signal is input, which is set in the recorded image frame number setting unit, are recorded.

[0201] In addition, in the recording stop section of the above-mentioned recording section 6, when it is determined by the above-mentioned determination section that there is an area where recording is not completed and the recording is stopped after recording the maximum image frame that can be recorded in the segment, all image frames can be recorded even if the next trigger signal is input in the segment, and sometimes there is no need to input the analog trigger signal to the next segment.

[0202] That is, when writing to the current segment has not been completed once, and the value set as the number of frames after the input trigger signal from the trigger frame related to the trigger signal last input in the segment is added and the result does not exceed the total number of frames in the segment, all the desired image frames can be recorded (remained) in the segment without inputting (issuing) the analog trigger signal.

[0203] Therefore, an analog trigger signal input determination unit for determining whether to input the analog trigger signal to the next segment or not may be additionally provided in the analog trigger signal input unit 13 .

[0204] (Description of the Case Where Image Frame Information is Placed Within a Segment in Embodiment 2 of the Present Invention)

[0205] For example, in the above embodiment 1, as described above Figure 5 As shown, in segment B, the recording is stopped by the recording stop unit after a predetermined number of images are written after the trigger frame to which the trigger signal is input. Therefore, no recording is performed in the image frame areas [B5] to [B9] of segment B.

[0206] Therefore, this area is not flexibly utilized to enter the next segment. Therefore, in order to effectively utilize the memory, in Example 2, when the trigger signal is input to the position [B0] of segment B, when the prescribed number of image frames (including the trigger frame, which is 5 frames) set by the above-mentioned video stop unit is recorded, that is, when [B4] is recorded, there is still an unfinished recording area ([B6] to [B9]). Therefore, the above-mentioned determination unit determines that there is an unfinished recording area, and the above-mentioned video stop unit does not end the recording at [B4], but as shown in FIG. Figure 14 As shown, in the above-mentioned video stop section, after the end of the ring buffer (i.e. [B9]) is written, the writing of the image frame is stopped, and as shown in FIG. Figure 6 As shown, transfer to the next segment "C".

[0207] Furthermore, for example, in the above-mentioned embodiment 1, if Figure 3As shown, when a trigger signal is input at the timing of writing the image frame into the image frame area [A8] of segment A, the recording is stopped in the image frame area [A2], and the required image frames remain in the image frame areas [A0] to [A9]. However, even in Example 2, there is no unfinished recording area in the image frame area [A2] at the time of stopping the recording. Therefore, the above-mentioned determination unit determines that there is no unfinished recording area, and uses the above-mentioned recording stopping unit to stop the recording in the image frame area [A2], so that the required image frames remain in the image frame areas [A0] to [A9].

[0208] (Description of the Case Where Image Frame Information is Set as a Sequence Number in Embodiment 2 of the Present Invention)

[0209] In addition, in the above embodiment 1, as mentioned above Figure 11 As shown, image frame areas [B5] to [B9] of segment B are not recorded.

[0210] Therefore, the next segment is entered without making full use of the area. Therefore, in order to effectively use the memory, in the second embodiment, even for the sequence number <33> When a trigger signal is input, as described above, it does not end at

[37] as [B4], but as Figure 15 As shown, after the video stop unit writes to the end of the ring buffer (i.e.

[42] ), the writing of the image frame is stopped, and as shown in FIG. Figure 16 As shown, transfer to the next segment "C".

[0211] Furthermore, similar to the description of the image frame information based on the position within the segment, when there is no unrecorded area at the time of stopping the recording, the recording is stopped at that time by the recording stopping unit.

[0212] (Description of Embodiment 2 of the Present Invention Based on Frame Data)

[0213] Figure 17 This is a diagram showing the image frame data recorded in each segment when each trigger signal is input to each segment, and the recording operation based on the input of the trigger signal for each segment is specifically described using this diagram.

[0214] By recording all the frames of each segment independently of the trigger signal input timing, the recording memory can be used without waste.

[0215] The following example is shown: The setting is to enable recording of the same number of frames before and after the trigger signal is input, with the clip divided into four and the trigger signal input applied four times. Furthermore, for clips 0 through 3, the portion marked with patterns indicates that the recording memory remains, while the portion without patterns indicates that it has been overwritten and lost. Furthermore, Data 0 through Data 3 represent the recorded data managed as the shooting scene.

[0216] However, in Example 2, unlike Example 1, it is set that even after the required image frames are recorded, when the above-mentioned determination unit determines that there is an area where recording is not completed, each segment is transferred to the next segment after recording the maximum number of image frames that can be recorded for each segment (up to the range that is not overwritten).

[0217] like Figure 17 As shown, in the new method, the segments and shooting scenes do not have to be consistent.

[0218] First, an image is written in a ring buffer in segment 0. Then, upon input of the first trigger signal, a trigger frame for data 0 is generated. After recording a predetermined number of frames following the input of the first trigger signal, recording of segment 0 is terminated, switching to segment 1, and writing to segment 1 is performed.

[0219] Then, regarding the image frames based on the first trigger signal, the image frame management unit 12 records as data 0 image frames corresponding to the required number of image frame information set in advance by the recorded image frame number setting unit.

[0220] Furthermore, after the first trigger signal is input, the delay management unit 13 enters a delay state in the current recording of segment 0 .

[0221] Moreover, regarding the second trigger signal input, since it is input in the recording of segment 0 after the first trigger signal input (delayed state), the above-mentioned repetition management unit 13b judges it as a repetition state, stops the recording of the above-mentioned segment 0, and inputs the analog trigger signal to the next segment 1 when transferring to the next segment 1 for writing.

[0222] Furthermore, the delay state caused by the first input of the trigger signal is eliminated by transitioning to the next segment.

[0223] Furthermore, the aforementioned repeated state is also eliminated by inputting an analog trigger signal in the next segment.

[0224] In addition, since the analog trigger signal is input in the next segment 1, the delay management unit 13a puts the segment into a delayed state.

[0225] Moreover, the next segment 1 is recorded based on the analog trigger signal with the prescribed number of image frames set by the recording stop unit. However, since there is still an area in which recording has not been completed in segment 1, the determination unit determines that there is an area in which recording has not been completed, and the recording stop unit stops recording after recording all the frames, and then moves to the next segment 2, and writes to the next segment 2.

[0226] Then, regarding the image frames based on the second trigger signal, the image frame management unit 12 records, as data 1, image frames corresponding to the required number of image frame information set in advance by the recorded image frame number setting unit.

[0227] In this case, the image frames of segment 0 alone are insufficient, so the image frames recorded in segment 1 are added to create data 1.

[0228] Furthermore, the delay state caused by the input of the analog trigger signal is eliminated by transitioning to the next segment 2 .

[0229] Moreover, in the next segment 2 mentioned above, when the third trigger signal is input, the video is recorded with the specified number of image frames set by the above-mentioned video recording stop unit. However, since there is still an area in segment 2 where the video recording is not completed, the above-mentioned determination unit determines that there is an area in which the video recording is not completed. After the video recording of the entire number of frames is completed, the video recording is stopped by the above-mentioned video recording stop unit, and then the video is transferred to the next segment 3, and writing is performed in the next segment 3.

[0230] Then, regarding the image frames based on the third trigger signal, the image frame management unit 12 records image frames corresponding to a required number of image frame information as data 2 .

[0231] In this case, the image frames of segment 2 alone are insufficient, so the image frames recorded in segment 1 are added to create data 2.

[0232] Furthermore, in response to the third input of the trigger signal, the delay management unit 13 a enters the delay state in the segment 2 .

[0233] Moreover, when the fourth trigger signal is input in the above-mentioned segment 2, since it is input in the recording of the segment 2 after the third trigger signal is input (delay state), the above-mentioned repetition management unit 13b is used to judge it as a repetition state, and the recording of the above-mentioned segment 2 is stopped. When transferring to the next segment 3 for writing, the analog trigger signal is input to the next segment 3.

[0234] Then, regarding the image frames based on the fourth trigger signal, the image frame management unit 12 records image frames corresponding to a required number of image frame information as data 3 .

[0235] In this case, the image frames of segment 2 alone are insufficient, so the image frames recorded in segment 3 are added to create data 3.

[0236] Furthermore, the delay state caused by the fourth input of the trigger signal is eliminated by transitioning to the next segment 3 .

[0237] Furthermore, the aforementioned repeated state is also eliminated by inputting an analog trigger signal in the next segment.

[0238] Moreover, in segment 3, the above-mentioned simulation trigger is used to record the video with the specified number of image frames set by the above-mentioned video recording stop unit. However, there is still an area in segment 3 where the video recording is not completed. Therefore, the above-mentioned determination unit is used to determine that there is an area where the video recording is not completed. After the video recording of the full number of frames is implemented, the video recording is stopped by the above-mentioned video recording stop unit, and the video is transferred to segment 0 as needed.

[0239] As described above, similarly to the first embodiment, no image frame remains in response to the input of each trigger signal.

Claims

1. A high-speed camera, characterized in that: The high-speed phase machine is composed of: an imaging unit that sequentially captures an image of a subject at a set exposure timing; The recording memory is divided into a plurality of segments, and data is sequentially transferred to each segment for writing until writing is stopped for each segment, and writing and rewriting are performed in a ring buffer shape; a recording unit that causes the recording memory to sequentially record the images captured by the imaging unit as image frames of digital data, and, upon input of a trigger signal, stops recording to the recording memory by a recording stop unit when a predetermined number of image frames set by the recording stop unit have been recorded, thereby causing the predetermined number of image frames to remain in the recording memory; a recording image frame number setting unit for presetting a predetermined number of image frames to be recorded based on the input of the trigger signal, the number of image frames preceding and following the image frame when the trigger signal is input; an area information management unit that stores segment information indicating which image frame is recorded in which segment and image frame information; and An image frame management unit, which obtains, based on the image frame information of the segment in which the trigger signal is input and the image frame information of other segments stored by the above-mentioned area information management unit: a specified number of image frames before and after the image frame when the trigger signal is input in a certain segment, which is set in advance by the above-mentioned video image frame number setting unit.

2. The high-speed camera according to claim 1, wherein The above-mentioned image frame information is the position of the image frame in each segment. The region information management unit is configured to store, for each segment, the position within the segment of each image frame recorded in the segment after the recording is stopped. The above-mentioned image frame management unit is constructed as follows: in order to obtain a specified number of image frames before and after the trigger frame set based on the input trigger signal and pre-set by the above-mentioned recording image frame number setting unit, for the positions of each image frame in the segment in which the above-mentioned trigger signal is input and stored by the above-mentioned area information management unit, the positions of the image frames that cannot be recorded in the segment of the above-mentioned trigger frame are supplemented from the positions of each image frame in other segments.

3. The high-speed camera according to claim 1, wherein The high-speed camera is provided with a serial number management unit, which assigns serial numbers to the image frames obtained by sequentially recording in the above-mentioned segments that are continuously transferred and recorded in sequence. The image frame information is a serial number assigned to each of the fragments by the serial number management unit. The region information management unit is configured to store, for each segment, the serial number of each image frame recorded in the segment after the recording is stopped, The above-mentioned image frame management unit is constructed as follows: in order to obtain a specified number of image frames before and after the trigger frame set based on the input trigger signal and pre-set by the above-mentioned recording image frame number setting unit, for the serial numbers of each image frame of the segment in which the above-mentioned trigger signal is input and stored by the above-mentioned area information management unit, the serial numbers of the image frames of the segment that cannot be recorded in the above-mentioned trigger frame are supplemented from the serial numbers of each image frame of other segments.

4. The high-speed camera according to claim 1, wherein When a trigger signal is repeatedly input in each segment and the video is continuously transferred to the next segment, the video recording unit is provided with an analog trigger signal input unit for issuing an analog trigger signal.

5. The high-speed camera according to claim 4, characterized in that The analog trigger signal input unit includes: a delay management unit that creates a delay state when an initial trigger signal is input in each segment and eliminates the delay state when recording of the segment currently being recorded stops; and A repetition management unit forms a repetition state when a new trigger signal is input in the above-mentioned delay state, inputs an analog trigger signal into the above-mentioned recording unit when stopping the recording of the current recording segment and continuously transferring to the next segment, and eliminates the repetition state when the analog trigger signal is input.

6. The high-speed camera according to any one of claims 1 to 5, characterized in that The predetermined number of image frames set by the recording stop unit is set to be a predetermined number of image frames after the image frame at the time of input of the trigger signal, which is preset by the recorded image frame number setting unit.

7. The high-speed camera according to any one of claims 1 to 5, characterized in that The video recording stop unit is provided with a determination unit for determining whether there is an unrecorded area in a segment when the predetermined number of image frames set by the video recording stop unit are recorded in the segment. When the determination unit determines that there is no unrecorded area, the recording stop unit is configured to stop recording when a predetermined number of image frames set by the recording stop unit are recorded. When it is determined that there is an area where no video is recorded, the video recording stop unit is configured to stop video recording until the video is written into the area where no video is recorded.

8. The high-speed camera according to claim 4 or 5, characterized in that: The analog trigger signal input unit is provided with an analog trigger signal input determination unit for determining whether to input the analog trigger signal to the next segment or not.

9. The high-speed camera according to claim 4 or 5, characterized in that: The video recording stop unit is provided with a determination unit for determining whether there is an unrecorded area in a segment when the predetermined number of image frames set by the video recording stop unit are recorded in the segment. When the determination unit determines that there is no unrecorded area, the recording stop unit is configured to stop recording when a predetermined number of image frames set by the recording stop unit are recorded. When it is determined that there is an unrecorded area, the recording stop unit is configured to stop recording until the unrecorded area is written. The analog trigger signal input unit is provided with an analog trigger signal input determination unit for determining whether to input the analog trigger signal to the next segment or not.

Images