JP7031703B2 - Information processing equipment and multi-camera system - Google Patents

Description

The present technology relates to information processing devices and multi-camera systems.

Conventionally, moving images have been taken from a plurality of angles in order to confirm the motion movement of a subject in sports practice or the like. At that time, I would like to check the video immediately, but in the past, it was played back one by one on the camera body, or it was taken into a personal computer and played back one file at a time. Also, in order to check the form at a certain moment, I wanted to switch images from different angles in a short time without stress in a paused state, but there was no way to do that.

For example, Patent Document 1 describes that summary content is automatically generated so that a plurality of contents can be grasped in a short time. In this case, the summary content is created by changing the playback speed of the content according to the amount of events generated in advance, but the captured content cannot be played immediately at any time or angle. ..

Japanese Unexamined Patent Publication No. 2010-039877

An object of the present technology is to enable good confirmation of images captured by a plurality of cameras.

The concept of this technology is
It consists of multiple cameras and a confirmation device connected to the multiple cameras by wire or wirelessly.
The above camera
Imager and
A memory for writing the image data of each frame obtained by being imaged by the above imager, and
When the end trigger signal is received from the confirmation device, the process of assigning a frame number to the frame of the past predetermined time from the frame corresponding to the reception timing of the trigger signal and the transfer accompanied by the frame number from the confirmation device. A control unit that controls a process of reading image data of a frame specified by the frame number from the memory and transferring the image data to the confirmation device when a request is received is provided.
The above confirmation device is
With the display
A process of transmitting an end trigger signal to the plurality of cameras, a process of transmitting a transfer request accompanied by a frame number to a predetermined camera selected from the plurality of cameras, and a process of transmitting a transfer request from the predetermined camera. It is in a multi-camera system including a control unit that controls a process of receiving image data of a frame and displaying an image based on the image data on the display.

In the present technology, a multi-camera system comprises a plurality of cameras and a confirmation device connected to the plurality of cameras by wire or wirelessly. For example, a plurality of cameras may be configured to capture the same subject at different angles.

The camera is provided with an imager, a memory for writing image data of each frame obtained by being imaged by the imager, and a control unit. When the end trigger signal is received from the confirmation device, the control unit controls the process of assigning a frame number to the frame of the past predetermined time from the frame corresponding to the reception timing of the trigger signal. Further, when a transfer request accompanied by a frame number is received from the confirmation device, the control unit controls a process of reading the image data of the frame specified by this frame number from the memory and transferring the image data to the confirmation device.

For example, even if the image data of each frame is compressed and written in the memory, and the intra-frame compressed image data of the frame specified by the frame number is transferred to the confirmation device. good. As a result, the amount of data can be reduced and the transfer can be performed smoothly. Further, the image data of each frame may be loop-recorded in the memory in a unit of at least a predetermined time or more. This makes it possible to save memory capacity.

The confirmation device is provided with a display and a control unit. The control unit controls the process of transmitting end trigger signals to a plurality of cameras. In addition, the control unit controls the process of transmitting a transfer request accompanied by a frame number to a predetermined camera selected from a plurality of cameras. Further, the control unit controls the process of receiving the image data of the frame specified by the frame number transferred from the predetermined camera and displaying the image based on the image data on the display.

For example, an operation unit for switching a predetermined camera may be further provided. In this case, for example, the operation unit may be configured to be composed of a touch panel arranged on the screen of the display. Then, in this case, for example, the display may display a button and / or a scroll bar for switching cameras. This makes it possible to easily and easily switch the camera (specific camera) for checking the image.

As described above, in the present technology, the end trigger signal is transmitted from the confirmation device to a plurality of cameras, and each camera assigns a frame number to the frame corresponding to the reception timing of the trigger signal to the frame of the past predetermined time. Further, the confirmation device transmits a transfer request with a frame number to the predetermined camera, and the confirmation device displays an image based on the image data sent from the predetermined camera. Therefore, the images captured by a plurality of cameras can be satisfactorily confirmed by the confirmation device. In this case, since the same frame number is assigned to the frames of the same time between the cameras, the camera angles can be easily switched in the frames of the same time.

According to this technique, images captured by a plurality of cameras can be confirmed satisfactorily. It should be noted that the effects described in the present specification are merely exemplary and not limited, and may have additional effects.

It is a block diagram which shows the configuration example of the multi-camera system as an embodiment. It is a figure which shows the installation state of a plurality of cameras. It is a block diagram which shows the structural example of a camera. It is a block diagram which shows the configuration example of the confirmation device. It is a figure which shows an example of the timing chart when the frame in a frame buffer is numbered by each camera. It is a figure which shows an example of the screen for reproducing the image (moving image content) taken by a multi-camera displayed on the panel of a confirmation device. It is a figure which shows the sequence example of the communication with each camera at the time of reproduction by a confirmation device. It is a figure which shows an example of the operation when the playback content of each camera is downloaded in advance to the frame buffer of a confirmation device. It is a figure which shows another example of the operation when the reproduction content of each camera is downloaded in advance to the frame buffer of a confirmation device. It is a block diagram which shows the other configuration example of a multi-camera system. It is a block diagram which shows the other configuration example of a multi-camera system. It is a block diagram which shows the other configuration example of a multi-camera system.

Hereinafter, embodiments for carrying out the invention (hereinafter referred to as “embodiments”) will be described. The explanations will be given in the following order.
1. 1. Embodiment 2. Modification example

<1. Embodiment>
[Multi-camera system configuration example]
FIG. 1 shows a configuration example of the multi-camera system 10A as an embodiment. This multi-camera system 10A has a plurality of cameras (video cameras), that is, a camera (camera A) 101-A, a camera (camera B) 101-B, and a camera (camera C) 101-C. is doing. Further, the multi-camera system 10A has a confirmation device 102 including a mobile terminal such as a smartphone or a tablet, a personal computer, or the like.

The cameras 101-A, 101-B, 101-C and the confirmation device 102 are connected to the LAN by wire or wirelessly. For example, the confirmation device 102 constitutes a master device, and each of the cameras 101-A, 101-B, and 101-C constitutes a slave device. FIG. 2 shows the installation state of the cameras 101-A, 101-B, and 101-C. The cameras 101-A, 101-B, and 101-C are arranged so as to capture the same subject OB at different angles.

The confirmation device 102 can trigger the start / end of imaging for each camera according to the user operation. In this case, the confirmation device 102, which is a master device, issues a trigger signal (command) for starting / ending imaging to each camera. Each camera receives this trigger signal via the control interface (control I / F) constituting the communication portion, and operates according to the instruction. The control interface of each camera is built in the camera. Further, the confirmation device 102 includes a panel (display), and after the shooting is completed, the image captured by each camera can be confirmed on this display.

The cameras 101-A, 101-B, and 101-C each include an imager and a memory for writing image data of each frame obtained by being imaged by the imager. In this case, the image data of each frame (for example, the frame rate is 60 Hz) is intra-frame compressed, and in this embodiment, JPEG-compressed and written in the memory. Further, in the memory, the image data of each frame is loop-recorded in a unit of at least a predetermined time or longer, and in this embodiment, 3 seconds or longer. It is not always necessary to perform loop recording, and the image data of each frame may be encoded by AVC or the like and written to the memory.

When the end trigger signal is received from the confirmation device 102, the cameras 101-A, 101-B, and 101-C have a frame corresponding to the end trigger signal for a predetermined time in the past, or a frame for 3 seconds in this embodiment. The process of assigning a frame number to the camera is performed. For example, the frame number of the first frame is "1" and the last frame number is "180". Further, each of the cameras 101-A, 101-B, and 101-C reads out the image data of the frame specified by this frame number from the memory when the transfer request accompanied by the frame number is received from the confirmation device 102. And transfer to the confirmation device 102.

The confirmation device 102 sends an end trigger signal to each camera in response to the user's imaging stop operation. Further, the confirmation device 102 transmits a transfer request accompanied by a frame number to a predetermined camera selected from the cameras 101-A, 101-B, and 101-C according to the user operation. Then, the confirmation device 102 receives the image data of the frame designated by the frame number transferred from the predetermined camera, and displays the image based on the image data on the panel (display).

"Camera configuration example"
FIG. 3 shows a configuration example of the camera 101 (101-A, 101-B, 101-C). The camera 101 includes a CPU 111, a memory 112, an imager / lens unit 113, a camera signal processing unit 114, and a codec processing unit 115. Further, the camera 101 has a panel processing unit 116, a panel 117, a wired communication processing unit 118, a wired LAN terminal 119, a wireless communication processing unit 120, and an antenna 121.

The CPU 111 controls the operation of each part of the camera 101. The memory 112 constitutes a storage of control software, data storage, a work area of the CPU 111, and the like. The memory 112 also constitutes a frame buffer for loop recording the captured image data.

The imager / lens unit 113 includes an image pickup lens and an imager, and images a subject to obtain an image pickup signal. The camera signal processing unit 114 processes the image pickup signal obtained by the imager / lens unit 113 to generate image data (captured image data) corresponding to the subject. The codec processing unit 115 performs JPEG compression processing on the image data of each frame obtained by the camera signal processing unit 114. In the frame buffer of the memory 112, the image data of each frame compressed in this way is loop-recorded.

The panel processing unit 116 drives the panel 117 based on the image data obtained by the camera signal processing unit 114, and displays the captured image on the panel 117. The panel 117 is composed of an LCD, an organic EL panel, or the like. The panel 117 has a touch panel function, and the panel 117 is also provided with a UI display for user operation, if necessary.

The wired communication processing unit 118 performs wired communication with an external device, in this embodiment, the confirmation device 102 through the wired LAN terminal 119. The wireless communication processing unit 120 wirelessly communicates with an external device, in this embodiment, the confirmation device 102 through the antenna 121. Either wireless communication or wired communication is selectively performed.

"Configuration example of confirmation device"
FIG. 4 shows a configuration example of the confirmation device 102. The confirmation device 102 includes a CPU 131, a memory 132, a codec processing unit 133, and a graphic processing unit 134. Further, the confirmation device 102 has a panel processing unit 135, a panel 136, a wired communication processing unit 137, a wired LAN terminal 138, a wireless communication processing unit 139, and an antenna 140.

The CPU 131 controls the operation of each part of the confirmation device 102. The memory 132 constitutes a storage of control software, a storage of data, a work area of the CPU 131, and the like. Further, the memory 132 temporarily records the image data of each frame transferred from the camera 101 (see FIG. 3).

The codec processing unit 133 reads out the image data of each frame temporarily recorded in the frame buffer of the memory 132 for image display, and performs decompression processing. The panel processing unit 135 drives the display panel 136 based on the image data obtained by the decompression processing by the codec processing unit 133, and displays the image on the panel 136. The panel 136 is composed of an LCD, an organic EL panel, or the like. The panel 136 has a touch panel function, and if necessary, the panel 136 also displays a UI for user operation.

The wired communication processing unit 137 performs wired communication with an external device, in this embodiment, with the camera 101 through the wired LAN terminal 138. The wireless communication processing unit 139 wirelessly communicates with an external device, in this embodiment, with the camera 101 through the antenna 140. Either wireless communication or wired communication is selectively performed.

"Example of frame numbering by end trigger"
FIG. 5 shows an example of a timing chart when a frame in a frame buffer is numbered by each camera when an end trigger signal is sent from the confirmation device 102 to each camera. At time t1, the confirmation device 102 sends an end trigger signal to each camera. Each camera stops the recording operation until the frame corresponding to this time t1 (the imaging operation does not necessarily have to be stopped, but the imaging operation may also be stopped), and the frame number of the frame is set to "1". do. Then, each camera retroactively numbers each frame recorded in the frame buffer with respect to the frame having the frame number "1".

In the illustrated example, since the moving image frames for 3 seconds from the end trigger are numbered, the number of the first frame is "180". As a result, the frames with the same frame number of each camera can be regarded as the same time. Each camera does not necessarily have to have the same exposure phase due to Genlock or the like. Further, there may be timing fluctuations before the end trigger signal from the confirmation device 102 reaches each camera. However, if the exposure phase and trigger timing are the same, it is possible to make a beautiful transition between camera switching during playback.

"Example of user interface on confirmation device"
FIG. 6 shows an example of a screen for reproducing an image (moving image content) captured by a multi-camera displayed on the panel 136 of the confirmation device 102. In this example, the camera (camera A) 101-A is selected and the captured image 300 is displayed. On this screen, a UI screen for user operation is superimposed on the captured image.

On this screen, normal playback operations such as playback, pause, fast forward, rewind, and frame advance of the captured image of the selected camera can be performed by user operation from the playback operation unit 301 on which the playback icon is displayed. It can be carried out. Here, the playback icon also has a scroll bar, and by scrolling with your finger, you can advance back and forth frame by frame, and fast forward and rewind.

Further, the camera can be switched to another camera angle at an arbitrary playback time by a user operation from the camera switching operation unit 302 on which the camera switching icon is displayed. In this example, when the button "B" is pressed, the image is switched to the captured image of the camera (camera B) 101-B at the same time as the camera (camera A) 101-A at the moment of pressing. Similarly, when the button "C" is pressed, the image is switched to the captured image of the camera (camera C) 101-C at the same time as the camera (camera A) 101-A at the moment of pressing.

The camera switching operation is not limited to the operation of pressing a button, but the camera can be switched from left to right or from right to left one after another by the scroll bar existing at the top of the button. When the number of cameras is large, the same playback expression as the time slice video is possible. The cameras can be switched during playback or pause.

"Communication sequence between the confirmation device and each camera"
The sequence diagram of FIG. 7 shows an example of a sequence of communication with each camera during reproduction by the confirmation device 102. First, a communication example is shown when the image of the camera (camera A) 101-A is displayed frame by frame.

Since the frame number of the first frame is "180 (# 180)", the confirmation device 102 indicates the image data of the frame of # 180 (in this case, JPEG compression coding) with respect to the camera (camera A) 101-A. ) Request a transfer. On the other hand, the camera (camera A) 101-A reads out the image data of the frame # 180 in its own frame buffer and transfers it to the confirmation device 102. As a result, in the confirmation device 102, the image based on the image data of the frame of # 180 is displayed on the panel 136.

Next, similarly, the confirmation device 102 requests the camera (camera A) 101-A to transfer the image data of the frame of # 179. On the other hand, the camera (camera A) 101-A reads out the image data of the frame of # 179 in its own frame buffer and transfers it to the confirmation device 102. As a result, in the confirmation device 102, the image based on the image data of the frame of # 179 is displayed on the panel 136.

Next, the confirmation device 102 switches to (camera B) 101-B. This corresponds to, for example, the operation when the "B" button on the camera switching operation unit 302 is pressed on the UI screen of FIG. In this case, the confirmation device 102 requests the camera (camera B) 101-B to transfer the image data of the frame of # 179. On the other hand, the camera (camera B) 101-B reads out the image data of the frame of # 179 in its own frame buffer and transfers it to the confirmation device 102. As a result, in the confirmation device 102, the image based on the image data of the frame of # 179 is displayed on the panel 136. Hereinafter, the operation is the same.

"Example of improvement of display latency"
In the above description, when displaying the image of the predetermined frame of the predetermined camera on the confirmation device 102, an example of acquiring the image data of the predetermined frame from the predetermined camera each time is shown. In this case, especially in the case of a wireless LAN connection, it is expected that the display latency will increase depending on the condition of the communication path.

In order to improve the display latency, it is conceivable to provide a frame buffer in the memory 132 (see FIG. 4) of the confirmation device 102 and download the playback content of each camera to the frame buffer in advance. In this embodiment, the JPEG files of all the cameras for 3 seconds are buffered in the confirmation device 102 in advance. After this buffering, the confirmation device 102 is closed and the reproduction is performed, so that the display latency is improved without being affected by the condition of the communication path.

The timing chart of FIG. 8 shows an example of an operation when the playback content of each camera is downloaded in advance into the frame buffer of the confirmation device 102. Immediately after the recording operation in which the end trigger signal is supplied to each camera is stopped, the confirmation device 102 acquires image data of a predetermined frame from a predetermined camera and displays an image. Then, each camera operates to transfer a JPEG file (= Motion JPRG / MPEG) for 3 seconds to the confirmation device 102.

After this transfer is completed, when displaying the image of the predetermined frame of the predetermined camera, the confirmation device 102 acquires the image data of the predetermined frame from its own frame buffer instead of communicating with each camera, and the image. Display. As a result, the display latency is improved without being affected by the condition of the communication path.

The timing chart of FIG. 9 shows another example of the operation when the playback content of each camera is downloaded in advance into the frame buffer of the confirmation device 102. In this example, the image data transferred by each camera to the confirmation device 102 behind the scenes is not JPEG compressed data but a main stream encoded by AVC or the like. In this case, after the transfer, the confirmation device 102 may further re-encode the data such as JPEG in frame units.

As described above, in the multi-camera system 10A shown in FIG. 1, an end trigger signal is transmitted from the confirmation device 102 to the cameras 101-A, 101-B, 101-C, and each camera receives the trigger signal at the reception timing. A frame number is assigned to the frame of the past predetermined time from the corresponding frame, a transfer request with the frame number is transmitted from the confirmation device 102 to the predetermined camera, and the image data sent from the predetermined camera is transmitted by the confirmation device 102. The image is displayed. Therefore, the image captured by each camera can be satisfactorily confirmed in the confirmation device 102. Further, in this case, since the same frame number is assigned to the frames of the same time between the cameras, the camera angles can be easily switched in the frames of the same time.

<2. Modification example>
In the above-described embodiment, an example is shown in which the frame rate of the captured image data of the cameras 101-A, 101-B, and 101-C is 60 Hz. This technique can be similarly applied to cases where the frame rate of the captured image data of the cameras 101-A, 101-B, 101-C is other than that, for example, when the frame rate is high, for example, 240 Hz shown in FIG. It can be applied in the same way.

Further, in the above-described embodiment, an example in which the number of cameras is three is shown. This technology can be similarly applied to the case where there are two or four or more cameras.

Further, in the above-described embodiment, an example in which a control interface is provided inside each camera is shown. However, the camera does not have a control interface, and it is conceivable to provide a control device outside the camera.

FIG. 10 shows a configuration example of the multi-camera system 10B in that case. In FIG. 10, the portions corresponding to those in FIG. 1 are designated by the same reference numerals. Unlike the multi-camera system 10A shown in FIG. 1, the cameras 101-A, 101-B, and 101-C do not have a control interface (control I / F), respectively. Outside the cameras 101-A, 101-B, and 101-C, a control device (control device A) 101-A and a control device (control) that have the same functions as the control interface (control I / F), respectively. Equipment B) 101-B and control equipment (control equipment C) 101-C are provided.

Further, in the above-described embodiment, an example is shown in which the confirmation device 102 is provided separately from the cameras 101-A, 101-B, and 101-C. However, a configuration is also conceivable in which the confirmation device 102 is not provided and any of the cameras 101-A, 101-B, and 101-C also serves as the confirmation device. FIG. 11 shows a configuration example of the multi-camera system 10C in that case. In FIG. 11, the parts corresponding to those in FIG. 1 are designated by the same reference numerals.

The multi-camera system 10C shown in FIG. 11 corresponds to the multi-camera system 10A shown in FIG. 1, but it goes without saying that a system corresponding to the multi-camera system 10B shown in FIG. 10 can be similarly configured. Although detailed description is omitted, FIG. 12 shows a configuration example of the multi-camera system 10D in that case.

In addition, this technology can also have the following configurations.
(1) It consists of a plurality of cameras and a confirmation device connected to the plurality of cameras by wire or wirelessly.
The above camera
Imager and
A memory for writing the image data of each frame obtained by being imaged by the above imager, and
When the end trigger signal is received from the confirmation device, the process of assigning a frame number to the frame of the past predetermined time from the frame corresponding to the reception timing of the trigger signal and the transfer accompanied by the frame number from the confirmation device. A control unit that controls a process of reading image data of a frame specified by the frame number from the memory and transferring the image data to the confirmation device when a request is received is provided.
The above confirmation device is
With the display
A process of transmitting an end trigger signal to the plurality of cameras, a process of transmitting a transfer request accompanied by a frame number to a predetermined camera selected from the plurality of cameras, and a process of transmitting a transfer request from the predetermined camera. A multi-camera system including a control unit that controls a process of receiving image data of a frame and displaying an image based on the image data on the display.
(2) The multi-camera system according to (1) above, wherein the plurality of cameras capture the same subject at different angles.
(3) Imager and
A memory for writing the image data of each frame obtained by being imaged by the above imager, and
When an end trigger signal is received from the confirmation device, a process of assigning a frame number to a frame having a predetermined time in the past from a frame corresponding to the reception timing of the trigger signal, and a transfer request accompanied by the frame number from the confirmation device. A camera including a control unit that controls a process of reading image data of a frame specified by the frame number from the memory and transferring the image data to the confirmation device when the image data is received.
(4) The image data of each frame is compressed and written in the memory, and the intra-frame compressed image data of the frame specified by the frame number is transferred to the confirmation device (3). The camera described in.
(5) The camera according to (3) or (4) above, wherein the image data of each frame is loop-recorded in the memory in units of at least a predetermined time or longer.
(6) A processing method of a camera including an imager and a memory for writing image data of each frame obtained by being imaged by the imager.
When the end trigger signal is received from the confirmation device, the step of assigning a frame number to the frame of the past predetermined time from the frame corresponding to the reception timing of the trigger signal, and
A processing method of a camera having a step of reading image data of a frame specified by the frame number from the memory and transferring the image data to the confirmation device when a transfer request accompanied by the frame number is received from the confirmation device.
(7) Display and
It is specified by the process of transmitting an end trigger signal to a plurality of cameras, the process of transmitting a transfer request accompanied by a frame number to a predetermined camera selected from the plurality of cameras, and the frame number transferred from the predetermined camera. A confirmation device including a control unit that controls a process of receiving image data of a frame and displaying an image based on the image data on the display.
(8) The confirmation device according to (7) above, further comprising an operation unit for switching the predetermined camera.
(9) The confirmation device according to the committee (8), wherein the operation unit is composed of a touch panel arranged on the screen of the display.
(10) The confirmation device according to (9) above, wherein a button and / or a scroll bar for switching the predetermined camera is displayed on the display.
(11) A processing method for a confirmation device provided with a display.
Steps to send end trigger signals to multiple cameras,
A step of sending a transfer request with a frame number to a predetermined camera selected from the above multiple cameras, and
A processing method of a confirmation device having a step of receiving image data of a frame specified by the frame number transferred from the predetermined camera and displaying an image based on the image data on the display.

10A, 10B, 10C, 10D ... Multi-camera system 101, 101-A, 101-B, 101-C ... Camera 102 ... Confirmation device 103-A, 103-B, 103-C ... Control equipment 111 ・ ・ ・ CPU
112 ・ ・ ・ Memory 113 ・ ・ ・ Imager / Lens unit 114 ・ ・ ・ Camera signal processing unit 115 ・ ・ ・ Codec processing unit 116 ・ ・ ・ Panel processing unit 117 ・ ・ ・ Panel 118 ・ ・ ・ Wired communication processing unit 119 ・・ ・ Wired LAN terminal 120 ・ ・ ・ Wireless communication processing unit 121 ・ ・ ・ Antenna 131 ・ ・ ・ CPU
132 ... Memory 133 ... Codec processing unit 134 ... Graphic processing unit 135 ... Panel processing unit 136 ... Panel 137 ... Wired communication processing unit 138 ... Wired LAN terminal 139 ... Wireless communication processing unit 140 ・ ・ ・ Antenna

Claims (30)

For each frame imaged by a plurality of cameras that capture the same subject from different angles and recorded in the frame buffers of the plurality of cameras, the plurality of cameras can be used for frames of the same time among the plurality of cameras. It has a control unit that controls the process of assigning the same frame number.
The control of the process to be assigned is performed by transmitting a trigger signal.
The plurality of cameras select each of the frames from the frames captured by the respective cameras based on the reception timing of the trigger signal.
Each of the frames is a frame having a predetermined time in the past from the frame corresponding to the reception timing of the trigger signal.
Each of the plurality of cameras assigns an initial value as a frame number to a frame corresponding to the reception timing of the trigger signal, and assigns a frame number sequentially incremented from the initial value to the frame of the past predetermined time. Information processing device. The initial value is 1.
The information processing apparatus according to claim 1. The information processing apparatus according to claim 1 or 2 , wherein each frame is a continuous frame of a part of the frames captured by each of the plurality of cameras. The information processing device according to any one of claims 1 to 3 , wherein the control unit controls a process of transmitting a transfer request accompanied by a frame number to a predetermined camera selected from the plurality of cameras. The information processing device according to claim 4 , wherein the control unit controls a process of receiving image data of a frame designated by the frame number from the predetermined camera. The plurality of cameras compress the image data of each frame into an intraframe and write it to the memory.
The information processing apparatus according to claim 5 , wherein the received image data is the intra-frame compressed image data of the frame specified by the frame number. The information processing device according to claim 5 or 6 , wherein the control unit controls a process of displaying an image based on the received image data on a display. The information processing apparatus according to any one of claims 4 to 7 , which has an operation unit for switching the predetermined camera. The information processing device according to claim 8 , wherein the operation unit is composed of a touch panel arranged on the screen of the display. The information processing apparatus according to claim 9 , wherein a button and / or a scroll bar for switching the predetermined camera is displayed on the display. The information processing apparatus according to claim 1 , wherein the plurality of cameras assign frame numbers to each frame recorded in the frame buffer in response to reception of the trigger signal. Claim 1 in the process of causing the plurality of cameras to assign the same frame number to frames of the same time among the plurality of cameras, the same frame number is assigned among the plurality of cameras to the frame corresponding to the reception timing of the trigger signal. The information processing apparatus according to any one of 1 to 11 . The information processing apparatus according to any one of claims 1 to 12 , wherein the plurality of cameras stop recording of an imaging frame in the frame buffer in response to receiving the trigger signal. The information processing apparatus according to any one of claims 1 to 13 , wherein the plurality of cameras first assign a frame number to a frame corresponding to a reception timing of the trigger signal. The information processing device according to any one of claims 1 to 14 , wherein the information processing device is one of the plurality of cameras. It is equipped with a plurality of cameras and an information processing device connected to the plurality of cameras by wire or wirelessly.
The information processing device is
For each frame imaged by the plurality of cameras that capture the same subject from different angles and recorded in the frame buffers of the plurality of cameras, the plurality of cameras have the same time frame among the plurality of cameras. Has a control unit that controls the process of assigning the same frame number .
The control of the process to be assigned is performed by transmitting a trigger signal.
The plurality of cameras select each of the frames from the frames captured by the respective cameras based on the reception timing of the trigger signal.
Each of the frames is a frame having a predetermined time in the past from the frame corresponding to the reception timing of the trigger signal.
Each of the plurality of cameras assigns an initial value as a frame number to a frame corresponding to the reception timing of the trigger signal, and assigns a frame number sequentially incremented from the initial value to the frame of the past predetermined time. Multi-camera system. The initial value is 1.
The multi-camera system according to claim 16. The multi-camera system according to claim 16 , wherein each frame is a continuous frame of a part of the frames imaged by each of the plurality of cameras. The multi-camera system according to any one of claims 16 to 18 , wherein the control unit controls a process of transmitting a transfer request accompanied by a frame number to a predetermined camera selected from the plurality of cameras. The multi-camera system according to claim 19 , wherein the control unit controls a process of receiving image data of a frame designated by the frame number from the predetermined camera. The plurality of cameras compress the image data of each frame into an intraframe and write it to the memory.
The multi-camera system according to claim 20 , wherein the received image data is the intra-frame compressed image data of the frame specified by the frame number. The multi-camera system according to claim 20 , wherein the control unit controls a process of displaying an image based on the received image data on a display. The multi-camera system according to any one of claims 19 to 22 , wherein the information processing device has an operation unit for switching the predetermined camera. The multi-camera system according to claim 23 , wherein the operation unit is composed of a touch panel arranged on the screen of the display. 24. The multi-camera system of claim 24 , wherein the display displays a button and / or a scroll bar for switching the predetermined camera. The multi-camera system according to any one of claims 16 to 25 , wherein the plurality of cameras assign frame numbers to each frame recorded in the frame buffer in response to reception of the trigger signal. 16. In the process of causing the plurality of cameras to assign the same frame number to frames of the same time among the plurality of cameras, the same frame number is assigned among the plurality of cameras to the frame corresponding to the reception timing of the trigger signal. The multi-camera system according to any one of 26 to 26 . The multi-camera system according to any one of claims 16 to 27 , wherein the plurality of cameras stop recording of an imaging frame in the frame buffer in response to receiving the trigger signal. The multi-camera system according to any one of claims 16 to 28 , wherein the plurality of cameras initially assign a frame number to a frame corresponding to the reception timing of the trigger signal. The multi-camera system according to any one of claims 16 to 29 , wherein the information processing device is one of the plurality of cameras.

Images