JP7234545B2 - Captured image display device, captured image display method, and captured image display program - Google Patents

Description

The present invention relates to a technology for displaying captured images.

2. Description of the Related Art In recent years, the use of IP for business cameras has been progressing, and services for distributing captured video data by streaming have become popular. Under these circumstances, there is a need for a system that can centrally manage the streaming of a large number of professional photography cameras in the cloud and monitor the status of the cameras and streaming.

For example, Patent Literature 1 discloses a monitoring system that displays images shot by cameras at a plurality of monitoring points side by side with map data. In Patent Document 2, when a predetermined camera device is selected from a plurality of camera devices, a corresponding map display area is displayed from a database, and a selection range of a predetermined shape including a predetermined number of cameras is displayed in the map display area. A system is disclosed for selecting a predetermined camera device from camera devices positioned within a selection range.

JP-A-11-102495 JP 2008-199531 A

In any of the systems disclosed in Patent Literature 1 and Patent Literature 2, it is difficult to simultaneously check the captured images in association with the shooting positions of the cameras without averting one's eyes when multiple cameras are monitored.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object of the present invention is to provide a photographed image display technique that allows the photographed image to be easily confirmed in association with the photographing position of the camera.

In order to solve the above problems, a captured image display device according to one aspect of the present invention is a captured image display device that generates a video signal for displaying a thumbnail image of a video captured by an imaging device on a map. A synthesizing unit (190) is provided for generating a video signal for synthesizing and displaying a thumbnail image of the image of the imaging device in the image display area provided corresponding to the shooting position of the imaging device. When the photographing positions of a plurality of imaging devices are present in the image display area, the synthesizing unit (190) switches and displays thumbnail images of videos of the plurality of imaging devices in the image display area in a predetermined order. A video signal is generated, or a video signal is generated for dividing the image display area and displaying thumbnail images of the images of the plurality of imaging devices in the divided area.

Another aspect of the present invention is a captured image display method. This method is a photographed image display method for generating a video signal for displaying a thumbnail image of a video imaged by an imaging device on a map. A synthesizing step for generating a video signal to be displayed by synthesizing thumbnail images of video images of the imaging device is included therein. In the synthesizing step, when there are photographing positions of a plurality of imaging devices within the image display area, a video signal is generated to switch and display thumbnail images of videos of the plurality of imaging devices in a predetermined order within the image display area. Alternatively, the image display area is divided to generate a video signal for displaying thumbnail images of the images of the plurality of imaging devices in the divided areas.

Any combination of the above constituent elements, and any conversion of expressions of the present invention into methods, devices, systems, recording media, computer programs, etc. are also effective as embodiments of the present invention.

According to the present invention, it is possible to easily check the photographed image in association with the photographing position of the camera.

1 is a diagram illustrating the configuration of a video data streaming monitoring system according to an embodiment; FIG. 2 is a diagram for explaining the configuration of the streaming monitoring device in FIG. 1; FIG. FIG. 2 is a diagram illustrating the configuration of a streaming data distribution server in FIG. 1; FIG. FIG. 3 is a flowchart for explaining a procedure for managing streaming data by the streaming monitoring device of FIG. 2; FIG. 3 is a flowchart for explaining an image synthesizing procedure by a screen synthesizing unit in FIG. 2; FIG. 3 is a diagram for explaining an example of composite display by a screen combining unit in FIG. 2; FIGS. 7A and 7B are diagrams for explaining the camera image display area of the first camera in FIG. 6. FIG. FIGS. 8A and 8B are diagrams for explaining the camera image display area of the third camera in FIG. 6. FIG. FIG. 9 is a diagram for explaining an example of synthesized display by the screen synthesizing unit in the modified example. FIGS. 10(a), 10(b), 10(c), and 10(d) are diagrams illustrating an example of superimposed display in the modification.

FIG. 1 is a diagram illustrating the configuration of a video data streaming monitoring system according to an embodiment. The video data streaming monitoring system includes cameras (imaging devices) 1000 and 1001, a GPS function-equipped router 2000, a distribution server 3000, a camera position management server 4000, a map data distribution server 5000, a streaming monitoring device 6000, and distribution bases 7000 and 7001. .

Cameras 1000 and 1001 are connected to a GPS function-equipped router 2000 via a wireless LAN such as Wi-Fi. Here, a form in which the cameras 1000 and 1001 are connected to the GPS function-equipped router 2000 via a wireless LAN will be described. may incorporate GPS functionality.

GPS function-equipped router 2000 is connected to distribution server 3000, camera position management server 4000, and streaming monitoring device 6000 via a network. Distribution server 3000 is connected to streaming monitoring device 6000 and distribution points 7000 and 7001 via a network. The camera position management server 4000 is connected to the streaming monitoring device 6000 via a network. The map data distribution server 5000 is connected to the streaming monitoring device 6000 via a network. Streaming monitoring device 6000 is connected to distribution server 3000 via a network.

Cameras 1000 and 1001 encode images taken at respective shooting locations and transmit streaming data to distribution server 3000 via router 2000 equipped with a GPS function. Here, the streaming data is full HD (High Definition) video with an image size of 1920 pixels by 1080 pixels and a frame rate of 30 fps.

The distribution server 3000 transcodes the streaming data transmitted from the GPS function-equipped router 2000 and transmits the transcoded data to one or more distribution bases 7000 and 7001 . The distribution server 3000 may distribute streaming data with different resolutions and frame rates for each of the distribution bases 7000 and 7001 . The plurality of distribution bases 7000 and 7001 may be receivers of different broadcast stations, or may be receivers of one broadcast station.

Also, the distribution server 3000 can distribute the streaming data transmitted from the GPS-equipped router 2000 to the streaming monitoring device 6000 .

Cameras 1000 and 1001 transmit thumbnail images of video being captured (referred to as “camera thumbnail images”) to streaming monitoring device 6000 via GPS function-equipped router 2000 . Here, the camera thumbnail image is, for example, a still image of QVGA size. Also, the camera thumbnail image is transmitted after being compressed as intra-frame coding (intra frame) by an image compression method such as JPEG or MPEG. Also, the streaming monitoring device 6000 may acquire camera thumbnail images from the cameras 1000 and 1001 using WEB API. WEB API means an application program interface that is called from a predetermined program using the HTTP (HyperText Transfer Protocol) protocol.

The distribution server 3000 transmits a thumbnail image of streaming data before transcoding (referred to as a "streaming thumbnail image") or a thumbnail image of streaming data after transcoding (referred to as a "distribution thumbnail image") transmitted from the GPS function-equipped router 2000. ) to the streaming monitoring device 6000 .

The GPS function-equipped router 2000 transmits GPS information including at least latitude and longitude as shooting position information of the cameras 1000 and 1001 to the camera position management server 4000 . Here, a form in which the GPS function-equipped router 2000 and the camera position management server 4000 are connected via a network will be described. good.

The camera position management server 4000 stores GPS information input from the GPS function-equipped router 2000, and transmits the GPS information to the streaming monitoring device 6000 as camera position information. Note that the GPS information is not necessarily input from the GPS-equipped router 2000 to the camera position management server 4000 . The camera position management server 4000 may record the GPS information by the user inputting the GPS information to the camera position management server 4000 via a web screen displayed on the browser. Alternatively, the camera position management server 4000 may record the GPS information by inputting the GPS information to the camera position management server 4000 using a recording medium in which the GPS information is recorded in advance.

The map data distribution server 5000 transmits the map data to the streaming monitoring device 6000. FIG.

Streaming monitoring device 6000 transmits distribution control data to distribution server 3000 . The distribution server 3000 appropriately transcodes the streaming data transmitted from the cameras 1000 and 1001 based on the distribution control data, and distributes the transcoded data to distribution bases 7000 and 7001 .

The distribution bases 7000 and 7001 receive the streaming data distributed from the distribution server 3000 and decode and use the streaming data. Here, the distribution bases 7000 and 7001 can separate and use the streaming data transmitted from the respective cameras 1000 and 1001 .

FIG. 2 is a diagram for explaining the configuration of the streaming monitoring device 6000. As shown in FIG.

The streaming monitoring device 6000 includes a distribution server thumbnail image acquisition unit 100, a camera thumbnail image acquisition unit 110, a distribution server information acquisition unit 120, a camera information acquisition unit 130, a camera position information acquisition unit 140, a thumbnail image selection unit 150, and notification information generation. It includes a unit 160 , a map data acquisition unit 180 , a screen synthesis unit 190 , a distribution base control unit 200 and a monitor 210 . The distribution server thumbnail image acquisition unit 100, camera thumbnail image acquisition unit 110, distribution server information acquisition unit 120, camera information acquisition unit 130, camera position information acquisition unit 140, thumbnail image selection unit 150, notification information generation unit 160, map The data acquisition unit 180, the screen synthesis unit 190, and the distribution base control unit 200 are configured by a CPU, RAM, or ROM, or a combination of these.

Although the distribution server thumbnail image acquisition unit 100 and the distribution server information acquisition unit 120 are configured separately here, the distribution server thumbnail image acquisition unit 100 and the distribution server information acquisition unit 120 may be integrated. Similarly, the camera thumbnail image acquisition section 110 and the camera information acquisition section 130 may be integrated.

Streaming monitor 6000 may be configured as a server-client system. In that case, the screen synthesizing unit 190 and the monitor 210 are provided on the client side, and the screen synthesizing unit 190 of the client functions as a browser, receives map data, image data, and notification information from the server via the network, and displays an image on the map. and the notification information are synthesized and displayed on the monitor 210 . Also, here, a configuration in which the streaming monitoring device 6000 includes the map data acquisition unit 180 will be described. The screen synthesizing unit 190 of the client may function as a browser, acquire map data from an external server, display the map on the screen, and synthesize the image and notification information on the map. Furthermore, when the processing load is distributed to the distribution server, the distribution server thumbnail image acquisition unit 100, the distribution server information acquisition unit 120, and the thumbnail image selection unit 150 may be provided on the client side.

The terminal 10 is connected to the distribution server 3000, the terminal 20 to the GPS function equipped router 2000, the terminal 30 to the camera position management server 4000, the terminal 40 to the map data distribution server 5000, and the terminal 50 to the distribution server 3000, respectively.

Distribution server thumbnail image acquisition section 100 acquires a “streaming thumbnail image” or a “distribution thumbnail image” from terminal 10 connected to distribution server 3000 and outputs it to thumbnail image selection section 150 .

Distribution server information acquisition section 120 acquires distribution server information from terminal 10 connected to distribution server 3000 and outputs the distribution server information to thumbnail image selection section 150 and notification information generation section 160 .

The distribution server information includes "distribution execution information" indicating whether the distribution server 3000 is currently distributing the streaming data of the cameras 1000 and 1001, the bit rate, delay time, and packet loss of the streaming data of the cameras 1000 and 1001. and "streaming information" that indicates the transmission quality of the streaming data, such as recovery. The packet loss information and the packet recovery information include the total number of packets from the start of streaming to the current time and the total number of packets in the most recent predetermined period, respectively. Note that packet loss (hereinafter referred to as “packet loss”) is a value obtained by, for example, subtracting the number of packets received by the receiver from the number of packets transmitted from the transmitter side.

The camera thumbnail image acquisition unit 110 acquires a “camera thumbnail image” from the terminal 20 connected to the GPS function equipped router 2000 and outputs it to the thumbnail image selection unit 150 .

The camera information acquisition unit 130 acquires camera information from the terminal 20 connected to the GPS function equipped router 2000 and outputs the camera information to the thumbnail image selection unit 150 and the notification information generation unit 160 . Note that the camera information acquisition unit 130 may acquire camera information from the cameras 1000 and 1001 using WEB API.

The camera information includes "camera identification information" for identifying the cameras 1000 and 1001, "streaming execution information" indicating whether the cameras 1000 and 1001 are streaming, and if the cameras 1000 and 1001 are streaming. contains "streaming target information", which is a URL indicating the streaming destination, and "camera error information" indicating insufficient storage capacity or insufficient remaining battery power of the cameras 1000 and 1001, and the like. The camera identification information includes a serial number that is unique to the camera, a camera name that can be set by the user, and the like. Here, it is assumed that the "streaming target information" describes the URLs indicating the cameras 1000 and 1001 and the URL indicating the distribution server 3000. FIG.

The thumbnail image selection unit 150 refers to the “streaming execution information” input from the camera information acquisition unit 130 and determines whether or not the cameras 1000 and 1001 are streaming. When the cameras 1000 and 1001 are streaming, the thumbnail image selection unit 150 refers to the “distribution execution information” input from the distribution server information acquisition unit 120, and the distribution server 3000 selects the streaming data of the cameras 1000 and 1001. Determine whether or not distribution is in progress.

When distribution server 3000 is distributing streaming data of cameras 1000 and 1001, thumbnail image selection unit 150 selects a thumbnail image ( (referred to as a “selected thumbnail image”), and outputs the selected thumbnail image to the screen synthesizing unit 190 .

When the distribution server 3000 is not distributing the streaming data of the cameras 1000 and 1001, the thumbnail image selection unit 150 selects the "streaming thumbnail image" input from the distribution server thumbnail image acquisition unit 100 as a thumbnail image to be synthesized on the screen. and outputs the selected thumbnail image to the screen synthesizing unit 190 .

When the cameras 1000 and 1001 are not streaming, the thumbnail image selection unit 150 selects the “camera thumbnail image” input from the camera thumbnail image acquisition unit 110 as a thumbnail image to be synthesized on the screen, and synthesizes the selected thumbnail image on the screen. Output to unit 190 .

Camera position information acquisition section 140 acquires camera position information from terminal 30 connected to camera position management server 4000 and outputs the camera position information to notification information generation section 160 and screen synthesis section 190 .

Map data acquisition unit 180 acquires map data from terminal 40 connected to map data distribution server 5000 and outputs the map data to screen synthesis unit 190 .

The notification information generation unit 160 uses the streaming information input from the distribution server information acquisition unit 120, the camera information input from the camera information acquisition unit 130, and the camera position information input from the camera position information acquisition unit 140, Notification information is generated, and the notification information is output to the screen synthesizing unit 190 and the distribution base control unit 200 together with the streaming information, the camera information, and the camera position information.

The screen synthesis unit 190 synthesizes the selected thumbnail image input from the thumbnail image selection unit 150 and the notification information input from the notification information generation unit 160 on the map data input from the map data acquisition unit 180, Displayed on monitor 210 .

Distribution base control section 200 outputs the streaming information input from notification information generation section 160 to terminal 50 connected to distribution server 3000 . The distribution server 3000 refers to the streaming information and selects distribution bases 7000 and 7001 according to the communication status.

FIG. 3 is a diagram for explaining the configuration of the distribution server 3000. As shown in FIG.

Distribution server 3000 includes receiving section 300 , transcoding section 400 , distribution sections 500 and 501 , streaming thumbnail image transmission section 600 , streaming information transmission section 700 and distribution thumbnail image transmission section 800 .

The terminal 61 is connected to the GPS function-equipped router 2000, the terminals 62, 63, and 64 are connected to the streaming monitoring device 6000, the terminal 65 is connected to the distribution base 7000, and the terminal 66 is connected to the distribution base 7001, respectively.

The receiving unit 300 outputs the streaming data input from the terminal 61 connected to the GPS function equipped router 2000 to the transcoding unit 400 and the distribution unit 501 . Further, the receiving unit 300 generates a streaming thumbnail image by extracting a still image of one frame from the received streaming data as necessary, and outputs the streaming thumbnail image to the streaming thumbnail image transmitting unit 600 . A streaming thumbnail image is, for example, a still image of QVGA size. Note that the streaming thumbnail image may be generated every predetermined period, for example, every 3 seconds. The receiving unit 300 also outputs streaming information indicating transmission quality such as the bit rate, delay time, packet loss, etc. of the streaming data to the streaming information transmitting unit 700 .

The transcoding unit 400 transcodes the streaming data of bit rate A input from the receiving unit 300 into an encoded stream of bit rate B, and outputs the encoded stream to the distribution unit 500 .

The distribution unit 500 outputs the encoded stream input from the transcoding unit 400 to the terminal 65 connected to the distribution base 7000 . Further, the distribution unit 500 generates a distribution thumbnail image by extracting a still image of one frame from the encoded stream as necessary, and outputs the distribution thumbnail image to the distribution thumbnail image transmission unit 800 . The distributed thumbnail image is, for example, a still image of QVGA size. Note that the distribution thumbnail image may be generated every predetermined period, for example, every 3 seconds.

The distribution unit 501 outputs the streaming data input from the reception unit 300 to the terminal 66 connected to the distribution base 7001 as necessary.

Streaming thumbnail image transmitting section 600 outputs the streaming thumbnail image input from receiving section 300 to terminal 62 connected to streaming monitoring device 6000 .

Distribution thumbnail image transmission section 800 outputs the distribution thumbnail image input from distribution section 500 to terminal 64 connected to streaming monitoring device 6000 .

If the distribution server 3000 is distributing the streaming data, the distribution thumbnail image transmission unit 800 provides the distribution thumbnail image of the encoded stream after transcoding to the streaming monitoring device 6000 . When the distribution server 3000 does not distribute the streaming data, the streaming thumbnail image transmission unit 600 provides the streaming monitoring device 6000 with the streaming thumbnail image of the streaming data before transcoding.

Streaming information transmitting section 700 outputs streaming information to terminal 63 connected to streaming monitoring device 6000 .

FIG. 4 is a flowchart for explaining a procedure for managing streaming data by the streaming monitoring device 6000. As shown in FIG. This management procedure is performed for each camera 1000, 1001 at an update interval of, for example, 3 seconds. The case of the camera 1000 will be described below.

The camera information acquisition unit 130 acquires the camera information of the camera 1000 from the GPS function-equipped router 2000, and outputs the camera information to the thumbnail image selection unit 150 and the notification information generation unit 160 (S100). The camera information includes identification information of the camera 1000 , streaming execution information indicating whether the camera 1000 is currently streaming, and error information of the camera 1000 .

The distribution server information acquisition unit 120 acquires distribution server information from the distribution server 3000, and outputs the distribution server information to the thumbnail image selection unit 150 and the notification information generation unit 160 (S110). The distribution server information includes distribution execution information indicating whether the distribution server 3000 is currently distributing the streaming data of the camera 1000, and streaming information indicating the transmission quality of the streaming data.

The thumbnail image selection unit 150 checks whether the streaming execution information indicates that the camera 1000 is streaming (S120).

If the streaming execution information indicates that the camera 1000 is streaming (YES in S120), the distribution server information acquisition unit 120 acquires the streaming information from the distribution server 3000 and sends the streaming information to the notification information generation unit 160. Output (S125).

Next, the thumbnail image selection unit 150 checks whether or not the distribution execution information indicates that the distribution server 3000 is distributing the streaming data of the camera 1000 (S130).

If the distribution execution information indicates that the distribution server 3000 is distributing the streaming data of the camera 1000 (YES in S130), the distribution server thumbnail image obtaining unit 100 obtains the distribution thumbnail image from the distribution server 3000, The image selection unit 150 selects the distribution thumbnail image as the selected thumbnail image and outputs it to the screen synthesis unit 190 (S150).

If the distribution execution information does not indicate that the distribution server 3000 is distributing the streaming data of the camera 1000 (NO in S130), the distribution server thumbnail image obtaining unit 100 obtains the streaming thumbnail image from the distribution server 3000, The image selection unit 150 selects the streaming thumbnail image as the selected thumbnail image and outputs it to the screen synthesis unit 190 (S140).

If the streaming execution information does not indicate that the camera 1000 is streaming (NO in S120), the camera thumbnail image acquisition unit 110 acquires the camera thumbnail image from the camera 1000, and the thumbnail image selection unit 150 selects the camera thumbnail image. It is selected as a selected thumbnail image and output to the screen synthesizing unit 190 (S160).

Following step S140, S150, or S160, camera position information acquisition unit 140 acquires camera position information from camera position management server 4000, and outputs the camera position information to notification information generation unit 160 and screen synthesis unit 190 ( S170).

The map data acquisition unit 180 acquires map data from the map data distribution server 5000, and outputs the map data to the screen synthesis unit 190 (S180).

The notification information generation unit 160 uses the streaming information input from the distribution server information acquisition unit 120, the camera information input from the camera information acquisition unit 130, and the camera position information input from the camera position information acquisition unit 140, Notification information is generated, and the notification information is output to the screen composition unit 190 together with the streaming information, the camera information, and the camera position information (S190).

The screen synthesizing unit 190 displays the map data in the map data display area, synthesizes the selected thumbnail image and the notification information on the map data display area based on the camera position information, generates a synthesized screen, and monitors the synthesized screen. 210 (S200). A monitor 210 displays the composite screen. The screen size of the monitor is, for example, WQXGA (Wide Quad eXtended Graphics Array) of 2560 pixels by 1600 pixels, and the map data display area is, for example, 2000 pixels by 1200 pixels.

The distribution base control unit 200 controls distribution bases based on the streaming information (S210). Here, the control of the distribution base will be described. The distribution base control unit 200 transmits the streaming information to the distribution server 3000, and the distribution server 3000 refers to the streaming information and selects the distribution bases 7000 and 7001 to which the streaming data is to be distributed according to the communication status. For example, when the total packet loss value of streaming information exceeds a predetermined value, distribution server 3000 switches the streaming data that has been distributed to distribution base 7000 to another distribution base 7001 .

As described above, if the cameras 1000 and 1001 are streaming, the thumbnail image is obtained from the distribution server 3000. Thumbnail images are acquired from cameras 1000 and 1001 . This eliminates the need for the cameras 1000 and 1001 to simultaneously process encoding of streaming data and encoding of thumbnail images. Images can be monitored continuously.

Although the streaming execution information is included in the camera information here, the streaming execution information may be included in the distribution server information. In this case, distribution server 3000 determines whether streaming is being performed by monitoring the reception status of streaming from GPS-equipped router 2000, and generates distribution server information including streaming execution information. Distribution server information acquisition section 120 acquires distribution server information from terminal 10 and outputs the distribution server information to thumbnail image selection section 150 and notification information generation section 160 . With such a configuration, the processing load of the camera can be reduced.

Here, the update interval of the thumbnail image is 3 seconds. is not limited to this. For example, if the streaming thumbnail image and the distribution thumbnail image are used as the selected thumbnail image, the update interval is set to 1 second, which is shorter than when the camera thumbnail image is used as the selected thumbnail image, thereby suppressing the amount of camera processing during streaming. However, it is possible to monitor the images captured by the camera with a higher degree of accuracy.

Here, the image size of the thumbnail image is QVGA. The image size is not limited to this. For example, when the selected thumbnail image is used as the distribution thumbnail image, by using VGA, which is a larger image size than when the selected thumbnail image is used as the camera thumbnail image, the processing amount of the camera during streaming can be suppressed and the image size can be increased. It is possible to monitor the image captured by the camera with high accuracy.

Here, if the distribution execution information indicates that the distribution server 3000 is currently distributing the streaming data of the camera 1000 (YES in S130), the distribution server thumbnail image obtaining unit 100 obtains the distribution thumbnail image from the distribution server 3000. (S150). If the distribution execution information does not indicate that the distribution server 3000 is currently distributing the streaming data of the camera 1000 (NO in S130), the distribution server thumbnail image obtaining unit 100 obtains the streaming thumbnail image from the distribution server 3000. (S140). However, there may be a case where the distribution server thumbnail image acquisition unit 100 cannot acquire the distribution thumbnail image or the streaming thumbnail image from the distribution server 3000 . For example, there may be a case where a distribution thumbnail image or a streaming thumbnail image cannot be obtained from the distribution server 3000 due to a deterioration in communication conditions, or a case where a distribution server that cannot obtain a distribution thumbnail image or a streaming thumbnail image is selected. .

Therefore, the thumbnail image selection section 150 may be configured to include a storage section (not shown). This storage unit stores a predetermined image. The predetermined image is, for example, a screen that issues a warning such as "thumbnail image cannot be obtained."

With such a configuration, when the distribution server thumbnail image obtaining unit 100 obtains a distribution thumbnail image from the distribution server 3000 (S150) and cannot obtain a distribution thumbnail image from the distribution server 3000, the distribution server The thumbnail image acquisition unit 100 may read a predetermined image from the storage unit and select the predetermined image as the selected thumbnail image.

When the distribution server thumbnail image obtaining unit 100 obtains a streaming thumbnail image from the distribution server 3000 (S140) and the streaming thumbnail image cannot be obtained from the distribution server 3000, the distribution server thumbnail image obtaining unit 100 obtains the streaming thumbnail image from the storage unit in advance. A predetermined image may be read and the predetermined image may be selected as the selected thumbnail image.

Furthermore, when thumbnail image selection unit 150 includes the above-described storage unit, the present embodiment can also be applied to distribution server 3000 that does not include streaming thumbnail image transmission unit 600 and distribution thumbnail image transmission unit 800. . In other words, the distribution server is specified from the streaming target information including the URL indicating the delivery server, and the determination as to whether or not the delivery thumbnail image can be obtained from the above-described delivery server 3000 is made by the specified server through the streaming thumbnail image transmission unit. 600 , whether or not the server has the distribution thumbnail image transmission unit 800 may be determined. If the server has the streaming thumbnail image transmission unit 600 and the distribution thumbnail image transmission unit 800, the streaming thumbnail image or the distribution thumbnail image is selected as the selected thumbnail image. Otherwise, a predetermined image is selected as the selected thumbnail image. Select as an image. With such a configuration, versatility can be enhanced.

Further, here, a configuration is provided in which a storage unit for storing a predetermined image is provided, but it may not be provided. In this case, if the streaming thumbnail image or distribution thumbnail image cannot be acquired from the distribution server 3000 in S140 or S150, in S200, instead of the selected thumbnail image, the streaming target information can be seen on the map data display area. A character string, for example, the streaming target information or a character string obtained by abbreviating the streaming target information may be synthesized with the notification information to generate a synthesized screen, and the synthesized screen may be output to the monitor 210 .

Next, a method for synthesizing and displaying the selected thumbnail image and the notification information on the map data based on the camera position information will be described in detail.

FIG. 5 is a flowchart for explaining the image synthesizing procedure by the screen synthesizing unit 190. As shown in FIG.

It is assumed that the total number of cameras to be displayed is N. It should be noted that the flowchart of FIG. 5 is processed each time the scale of the map data changes.

First, the image synthesizing unit 190 sets the camera position marker display flags of all cameras to ON (S301).

Next, the image synthesizing unit 190 determines the size of the rectangle of the camera image display area (S302). Here, the size of the rectangle of the camera image display area is a predetermined value in pixel units. The size of the rectangle of the camera image display area is determined according to the map data display area, and at least a plurality of camera image display areas are displayed in the map data display area. do.

Subsequently, the image synthesizing unit 190 repeats the processing from S303 to S390 for camera i. Here, the processing order of the N cameras is a predetermined order, and here, the order is based on the degree of importance set by the user. Alternatively, the processing order of the N cameras may be the registration order in which the cameras are registered in the streaming management system.

First, it is checked whether the camera position marker display flag of camera i is ON (S310).

If the camera position marker display flag of camera i is ON (YES in S310), the latitude and longitude of the lower left and upper right vertices of the camera image display area of camera i are calculated based on the scale of the map data (S320). . Note that the latitude and longitude can be calculated by selecting two vertices at diagonal positions among the four vertices of the camera image display area. may be calculated.

Following step S320, based on the latitude and longitude of the lower left and upper right vertices of the camera image display area of camera i and the camera position information of cameras other than camera i, cameras other than camera i are displayed in the camera image display area of camera i. camera exists (S330).

If a camera other than camera i exists within the camera image display area of camera i (YES in S330), the camera position marker display flags of the cameras other than camera i included in the camera image display area of camera i are set to OFF. (S340). At this time, the camera i becomes the representative camera, and the camera position information of the camera i becomes the representative position of the cameras existing within the camera image display area of the camera i. Whether or not camera j exists within the camera image display area of camera i is determined by comparing the latitude and longitude of the lower left and upper right corners of the camera image display area of camera i with the camera position information of camera j. can be determined by

If the camera position information of camera i or camera j could not be obtained, or if the camera position information of camera i or camera j was an invalid value, the camera position information of that camera could be obtained as the camera position information. Use last position. In addition, when the camera position information of camera i or camera j cannot be obtained, or when the camera position information of camera i or camera j is an invalid value, a predetermined camera position set in advance is used as the camera position information. may be used.

Subsequent to step S340, a video signal obtained by synthesizing camera thumbnail images, notification information, and camera information of camera i and cameras other than camera i included in the camera image display area of camera i within the camera image display area of camera i is generated. Generate (S350).

When there is no camera other than camera i within the camera image display area of camera i (NO in S330), a video obtained by synthesizing the camera thumbnail image, notification information, and camera information of camera i within the camera image display area of camera i. A signal is generated (S360).

If the camera position marker display flag of camera i is OFF (NO in S310), the process moves to step S390. Here, the camera for which the camera position marker display flag is determined to be OFF is the camera existing within the camera image display area of the representative camera.

After the processing from step S303 to step S390 is repeated for N cameras, the process ends.

FIG. 6 is a diagram illustrating an example of composite display by the screen composite unit 190. In FIG. Here, six cameras A to F are present on the map data display area 900 .

On the map data display area 900, camera position markers 910a, 910b, and 910c indicating the camera positions based on the camera position information LA, LB, and LC of the first, second, and third cameras A, B, and C, respectively, are black circles. is displayed. Camera image display areas 950a, 950b and 950c are displayed on the screen adjacent to the camera position markers 910a, 910b and 910c of the first, second and third cameras A, B and C, respectively. Here, the camera position marker is located at the lower left position of the camera image display area, but it may be located at the upper left position or the upper right position.

At this time, the camera position markers 910d, 910e, and 910f of the fourth, fifth, and sixth cameras D, E, and F existing within the camera image display area 950c of the third camera C are not displayed on the screen. For the sake of explanation, the positions of the fourth, fifth and sixth cameras D, E and F are indicated by white circles.

FIGS. 7A and 7B are diagrams for explaining the camera image display area 950a of the first camera A in FIG.

As shown in FIG. 7A, the camera image display area 950a includes a camera thumbnail image display area 920, a notification information display area 930, and a camera information display area 940. FIG.

In the camera thumbnail image display area 920, the selected thumbnail image of the first camera A is displayed after being scaled to match the size of the camera thumbnail image display area.

Notification information of the first camera A is displayed in a notification information display area 930 that is a peripheral area of the outer frame of the camera thumbnail image display area 920 .

Here, the notification information will be described in detail. The notification information generator 160 generates notification information under the following conditions. Notification information includes packet loss error notification, packet loss warning notification, packet recovery warning notification, camera error notification, and camera position loss notification. Each notification is managed by a notification type and can be distinguished by the notification type. .

When the notification information generation unit 160 determines that the total value of the packet loss of the streaming information in the most recent predetermined period exceeds the predetermined threshold value T1, it generates a packet loss error notification.

When the notification information generation unit 160 determines that the total value of the packet loss of the streaming information in the most recent predetermined period exceeds the predetermined threshold value T2 (T2T1), it generates a packet loss warning notification.

The notification information generation unit 160 determines that the total value of the number of packets retransmitted when a packet is lost and the number of packets error-corrected by FEC (Forward Error Correction) in the most recent predetermined period exceeds a predetermined threshold value T3 (T3T1). If determined to be exceeded, generate a packet recovery warning notification. It should be noted that when a packet is lost is, for example, the loss of a packet of streaming information due to an increase in the load on the server or network, but it may also occur due to a failure of a router, relay device, or the like.

In general, if the cause is an increase in server or network load, an increase in server or network load will first generate a packet recovery warning notification, and an increase in server or network load will generate a packet recovery warning notification. A packet loss error notification will be generated if a loss warning notification is generated and the server or network load increases. In other words, packet loss can be suppressed by reducing the load on the server or network or increasing the resources of the server or network at the stage when the packet recovery warning notification is notified. On the other hand, if the cause is a failure of a router, relay device, or the like, there is no packet recovery warning notification, and first a packet loss warning notification is generated, followed by a packet loss error notification. Thus, depending on the order in which the packet recovery warning notification, packet loss warning notification, and packet loss error notification are generated, it is possible to take countermeasures against an increase in load on servers and networks and failures of routers and relay devices.

When the notification information generation unit 160 determines that the camera error information indicates an error, it generates a camera error notification. Camera error information includes low battery, low memory card, streaming failure, and so on.

When the notification information generation unit 160 cannot acquire the camera position information or determines that the camera position information is an incorrect value, it generates a camera position disappearance notification.

In the notification information display area 930 of FIG. 7A, as an example, the notification type such as packet loss error notification, packet loss warning notification, or packet recovery warning notification is displayed with a character string and a background color is added. Note that when there is no notification information, nothing is displayed in the notification information display area 930 . In addition, the character string and background color displayed in the notification information display area 930 change in color according to the notification type, and blink in a predetermined period. The blinking interval may vary depending on the notification type. The background color may be, for example, red for packet loss warning notifications and yellow for packet loss error notifications. This makes it possible to grasp at a glance which camera on the map has a problem.

A camera name or the like included in the camera identification information is displayed in a camera information display area 940 below the camera thumbnail image display area 920 .

In FIG. 7A, the camera thumbnail image display area 920, the notification information display area 930, and the camera information display area 940 are displayed in the camera image display area 950a. As long as the display area 920 and the notification information display area 930 are included, it is not limited to FIG. 7(a). FIG. 7B shows a display example of a camera image display area 950a that includes the camera thumbnail image display area 920 and the notification information display area 930 but does not include the camera information display area 940. FIG.

FIGS. 8A and 8B are diagrams illustrating the camera image display area 950c of the third camera C in FIG. 6. FIG. For ease of explanation, FIG. 8 will be described based on an example in which a camera thumbnail image display area and a notification information display area are displayed. Symbols C, D, E, and F shown in FIG. 8 are shown for explanation and are not displayed on the actual screen.

First, the display example of FIG. 8A will be described. Selected thumbnail images of the four cameras C, D, E, and F are scaled and displayed so as to match the size of each area obtained by equally dividing the size of the camera thumbnail image display area into four. Selected thumbnail images of the four cameras C, D, E, and F are displayed in the camera thumbnail image display area based on the camera position information of each camera. Here, as shown in FIG. 8A, the camera thumbnail image display area is divided into four areas 920c, 920d, 920e, and 920f. Area 920c is the selected thumbnail image of camera C, and area 920d is the selected thumbnail image of camera D. , the selected thumbnail image of camera E is displayed in area 920e, and the selected thumbnail image of camera F is displayed in area 920f.

The notification information display area 930 is displayed only when at least one of the four cameras C, D, E, and F has notification information, and none of the four cameras C, D, E, and F has notification information. In this case, notification information display area 930 is not displayed. Here, a case where a plurality of cameras have notification information will be described. For example, when there is notification information for three cameras C, D, and E, in the notification information display area 930, the notification information for camera C blinks at predetermined intervals, and then the notification information for camera D blinks at predetermined intervals. Subsequently, notification information of camera E blinks at predetermined intervals. This is repeated. FIG. 8A illustrates a state in which the notification information of camera D is displayed in the notification information display area 930. FIG. By displaying a frame around the selected thumbnail image of camera D, the selected thumbnail image of camera D is emphasized so that the user can understand that the notification information of camera D is displayed in the notification information display area 930. . Similarly, when the notification information of cameras C and E is displayed in the notification information display area 930, the selected thumbnail images of cameras C and E are highlighted.

The camera position markers for the four cameras C, D, E, and F in FIG. 8A are represented by the camera position marker of the representative camera C, and when there is no camera other than camera C within the camera image display area 950c should be distinguished from the camera position markers for one camera C of . For this purpose, as an example, the color or shape of camera position markers for a plurality of cameras is set to a different color or shape from the camera position marker for a single camera. Also, the color of the camera position marker can be set to different colors and shapes depending on whether it is a camera thumbnail, a streaming thumbnail, or a distribution thumbnail.

Next, a display example of FIG. 8B will be described. The display cycle of the thumbnail images is the same as the update interval of the thumbnail images, and the selected thumbnail images of the four cameras C, D, E, and F are displayed in the thumbnail image display area for each display cycle of the selected thumbnail images. . That is, in the camera thumbnail image display area 920, the selected thumbnail image of camera C is displayed for 3 seconds, the selected thumbnail image of camera D is displayed for 3 seconds, the selected thumbnail image of camera E is displayed for 3 seconds, and the selected thumbnail image of camera F is displayed. The selected thumbnail image is displayed for 3 seconds. This is repeated. Here, the display cycle of the selected thumbnail images is set to be the same as the update interval of the thumbnail images. Alternatively, the display cycle of the selected thumbnail image can be set to a value obtained by dividing the update interval of the thumbnail image by the number of cameras.

Notification information of the camera displayed in the camera thumbnail image display area 920 is displayed in the notification information display area 930 . The period at which the notification information blinks at a predetermined interval is equal to or less than the update interval of the thumbnail image, and blinks at least once while the selected thumbnail image is displayed. In the example of FIG. 8B, when there is notification information about camera D and the selected thumbnail image of camera D is displayed in camera thumbnail image display area 920, the notification information of camera D is displayed in notification information display area 930. It is

8A and 8B may be switched depending on the number of cameras present in the camera image display area 950. FIG. That is, when the number of cameras present in the camera image display area 950 is a predetermined number (for example, 4) or less, the camera thumbnail image display area is divided as shown in FIG. Thumbnail images of images of a plurality of existing cameras are displayed in divided areas, and when the number of cameras existing in the camera image display area 950 exceeds a predetermined number, the camera images are displayed as shown in FIG. 8(b). Thumbnail images of videos of a plurality of cameras existing in the area 950 are displayed in the camera thumbnail image display area by switching in a predetermined order. By switching the display mode in this manner, thumbnail images of each camera can be confirmed with a screen configuration suitable for the number of cameras present in the camera image display area 950 .

When the camera image display areas 950a, 950b, and 950c in FIG. 6 are clicked, the camera being photographed is specified based on the camera identification information associated with the thumbnail image displayed at the clicked position, and the specified camera The video being streamed by is popped up on the screen as a streaming video details confirmation screen.

For example, the streaming video detail confirmation screen is displayed in full HD with an image size of 1920 pixels by 1080 pixels and a frame rate of 30 fps. The streaming image detail confirmation screen is used to confirm the details of the image being streamed. As described above, the image size and frame rate of the streaming data are larger than those of the thumbnail image, and the frame rate is higher.

In addition, on the streaming image detail confirmation screen, the camera information, camera position information, streaming information, and notification information are displayed in character strings so that the information can be confirmed.

As described above, by synthesizing and displaying the thumbnail image and the notification information on the map data based on the camera position information, the position of the camera, the captured image, and the notification information can be monitored at the same time.

In this embodiment, it is allowed from the beginning that cameras other than camera i exist within the camera image display area of camera i. You may adjust the scale of map data so that it may not exist. Note that the scale of the map data is the ratio of the actual distance reduced on the map, such as 1/1000, where the actual distance is the denominator and the distance on the map is the numerator. That is, when the scale of the map data is increased, the map is displayed in an enlarged size, and when the scale of the map data is decreased, the map is displayed in a reduced size.

As a specific example, before step S340, if the scale of the map data is equal to or less than a predetermined scale and the scale of the map data is increased (the map data is made more detailed), the camera image display area of the camera i is displayed. Check if it is possible to ensure that there are no cameras other than camera i in . If the scale of the map data is equal to or less than a predetermined scale and if it is possible to prevent cameras other than camera i from existing within the camera image display area of camera i, then the scale of the map data is increased for processing. exit. Step S340 may be processed if the scale of the map data is equal to or less than a predetermined scale and if it is not possible to prevent cameras other than camera i from existing within the camera image display area of camera i. Note that the predetermined scale may be a predetermined scale, or may be a scale at which a predetermined number of cameras are displayed on the map data display area 900 .

<Modification>
Also, it is assumed that the camera image display areas of camera C, camera D, camera E, and camera F are set as shown in FIG. 8(a) or 8(b) based on the camera position marker 910c. Another modification will be described with reference to FIGS. 9 and 10. FIG. This modification differs from the above-described embodiment in that the camera image display areas of camera C, camera D, camera E, and camera F are superimposed and displayed. In other words, in this modified example, when there are shooting positions of a plurality of imaging devices in the image display area, the image synthesizing unit 190 displays images of the plurality of imaging devices in the image display area based on a predetermined order. A video signal for superimposing and displaying a thumbnail image is generated.

FIG. 9 is a diagram for explaining an example of composite display by the screen composite unit 190. As shown in FIG. Here, four cameras C, D, E, and F are present on the map data display area 900 . Camera image display areas 950c, 950d, 950e, and 950f of camera C, camera D, camera E, and camera F are respectively adjacent to camera position markers 910c, 910d, 910e, and 910f, or predetermined distances from each camera position marker. It is displayed superimposed within the range. Note that the camera position markers 910d, 910e, and 910f of the cameras D, E, and F are located behind the camera image display area 950c, so the camera position markers 910d, 910e, and 910f are not displayed. Camera position markers 910d, 910e, and 910f are indicated by white circles, respectively.

FIG. 10 is a diagram illustrating an example of overlapping display of the camera image display areas 950c, 950d, 950e, and 950f. A predetermined order is predetermined for the camera image display areas 950c, 950d, 950e, and 950f. Based on this predetermined order, the camera image display area is displayed in front. Also, this predetermined order is changed in accordance with the set order at a predetermined cycle. For example, periodically, the predetermined order is changed so that the order is moved up, and the camera image display area with the highest order is changed to the camera image display area with the lowest order. Therefore, all of the camera image display areas 950c, 950d, 950e, and 950f are displayed in order in the foreground.

FIG. 10(a) is a diagram for explaining the display of the camera image display areas 950c, 950d, 950e, and 950f based on this order. Based on this order, the camera image display area 950c is displayed in front compared to the other camera image display areas 950d, 950e, and 950f. Also, the camera image display area 950d is displayed in front compared to the camera image display areas 950e and 950f, but is displayed in back compared to the camera image display area 950c. The camera image display area 950e is displayed in front compared to the camera image display area 950f, but is displayed in back compared to the camera image display areas 950c and 950d. The camera image display area 950f is displayed on the back side when compared to the camera image display areas 950c, 950d, and 950f.

In FIG. 10B, the order of the camera image display areas 950c, 950d, 950e, and 950f, which is the predetermined order described above, is changed at a predetermined cycle (for example, every second), and the camera image display areas 950d, 950e, It is a figure explaining a display when it becomes 950f and 950c. Based on this order, the camera image display area 950d is displayed in front compared to the other camera image display areas 950c, 950e, and 950f. On the other hand, the camera image display area 950c is displayed on the back as compared to the camera image display areas 950d, 950e, and 950f. Other camera image display areas 950e and 950f are displayed based on that order.

In FIG. 10C, the order of the camera image display areas 950d, 950e, 950f, and 950c, which is the order changed at a predetermined cycle, is further changed at a predetermined cycle, and the camera image display areas 950e, 950f, 950c, 950d is a diagram for explaining the display when the order is 950d. FIG. Based on this order, the camera image display area 950e is displayed in front compared to the other camera image display areas 950c, 950d, and 950f. Other camera image display areas 950f, 950c, and 950d are displayed based on that order.

In FIG. 10D, the order of the camera image display areas 950e, 950f, 950c, and 950d, which is the order changed in a predetermined cycle, is further changed in a predetermined cycle, and the camera image display areas 950f, 950c, 950d, 950e is a diagram for explaining the display when the order of 950e is reached. FIG. Based on this order, the camera image display area 950f is displayed in front compared to the other camera image display areas 950c, 950d, 950e. Other camera image display areas 950c, 950d, and 950f are displayed based on that order. Furthermore, when changed at a predetermined cycle, the predetermined order becomes the order of the camera image display areas 950c, 950d, 950e, and 950f, which is the display described with reference to FIG. 10(a).

Also, in this variation, camera position markers 910c, 910d, 910e, and 910f may be displayed. When displaying the camera position markers, each camera position marker is displayed after being synchronized with the corresponding camera image display area. That is, the camera position markers are displayed based on a predetermined order regarding the camera image display area. Note that the camera position marker is displayed in front of the corresponding camera image display area.

For example, in FIG. 10A, camera position markers 910c, 910d, 910e, and 910f are displayed based on the predetermined order of camera image display areas 950c, 950d, 950e, and 950f. Accordingly, the camera position markers 910d, 910e, and 910f are displayed behind compared to the camera image display area 950c. Therefore, the camera position markers 910d, 910e, and 910f are apparently not displayed.

In FIG. 10B, camera position markers 910c, 910d, 910e, and 910f are displayed based on the predetermined order of camera image display areas 950d, 950e, 950f, and 950c. Accordingly, the camera position marker 910d is displayed in front of the camera image display areas 950c, 950e, and 950f. The camera position marker 910e is displayed in the front compared to the camera image display areas 950c and 950f, but is displayed in the back compared to the camera image display area 950d. The camera position marker 910f is displayed in the front compared to the camera image display area 950c, but is displayed in the back compared to the camera image display areas 950d and 950e. Therefore, the camera position marker 910f is not displayed apparently. The camera position marker 910c is displayed behind the camera image display areas 950d, 950e, and 950f. displayed in appearance.

In FIG. 10C, camera position markers 910c, 910d, 910e, and 910f are displayed based on the predetermined order of camera image display areas 950e, 950f, 950c, and 950d. Further, in FIG. 10D, camera position markers 910c, 910d, 910e, and 910f are displayed based on the predetermined order of the camera image display areas 950f, 950c, 950d, and 950e. In FIG. 10(c), camera position markers 910c and 910e are apparently displayed, and in FIG. 10(d), camera position markers 910c and 910f are apparently displayed.

According to this modified example, the camera image display areas or the camera position markers of a plurality of cameras can be superimposed and displayed, so it is possible to relatively grasp the position of each camera.

Further, in this modification, when the camera image display area or the camera position marker displayed in the back is superimposed on the camera image display area or the camera position marker displayed in the front, the camera image display area or the camera position marker displayed in the back is The camera position marker was apparently not displayed. However, the camera image display area or the camera position marker superimposed on the camera image display area or the camera position marker displayed in front may be displayed with a dotted line, translucency, or the like. That is, the overlapping camera image display area or camera position marker may be displayed in a different manner than the non-overlapping camera image display area or camera position marker. These camera image display areas or camera position markers may then be displayed above the camera image display areas or camera position markers displayed in front. With such a configuration, it is possible to grasp the relative position of each camera at a glance.

As another example, the camera image display areas overlap but the camera position markers often do not overlap. good. Furthermore, the display may be controlled so that the camera position marker is always above the camera image display area, or the display may be controlled so that the camera image display area is always above the camera position marker. good.

The various types of processing described above can of course be realized as devices using hardware such as CPUs and memories. , can also be implemented by software such as a computer. The firmware program or software program may be recorded on a computer-readable recording medium and provided, transmitted to or received from a server via a wired or wireless network, or transmitted or received as data broadcasting of terrestrial or satellite digital broadcasting. is also possible.

The present invention has been described above based on the embodiments. It should be understood by those skilled in the art that the embodiments are examples, and that various modifications can be made to combinations of each component and each treatment process, and that such modifications are within the scope of the present invention. .

100 distribution server thumbnail image acquisition unit 110 camera thumbnail image acquisition unit 120 distribution server information acquisition unit 130 camera information acquisition unit 140 camera position information acquisition unit 150 thumbnail image selection unit 160 notification information generation unit 180 map data Acquisition unit 190 Screen synthesis unit 200 Distribution base control unit 210 Monitor 300 Reception unit 400 Transcode unit 500, 501 Distribution unit 600 Streaming thumbnail image transmission unit 700 Streaming information transmission unit 800 Distribution thumbnail image transmission Part 900 Map data display area 910 Camera position marker 920 Camera thumbnail image display area 930 Notification information display area 940 Camera information display area 950 Camera image display area 1000, 1001 Camera 2000 GPS function equipped router 3000 Distribution Server 4000 Camera Position Management Server 5000 Map Data Distribution Server 6000 Streaming Monitoring Device 7000, 7001 Distribution Base.

Claims (4)

A captured image display device for generating a video signal for displaying a thumbnail image of a video imaged by an imaging device on a map,
a synthesizing unit that generates a video signal for synthesizing and displaying thumbnail images of images of the imaging device in an image display area provided corresponding to the shooting position of the imaging device on the map;
The synthesizing unit divides the image display area and displays thumbnail images of the images of the plurality of imaging apparatuses in the divided areas when shooting positions of a plurality of imaging apparatuses are present in the image display area. generate a video signal,
When the number of imaging devices present in the image display area is equal to or less than a predetermined number, the synthesizing unit divides the image display area and displays thumbnail images of images of the plurality of imaging devices in the divided areas. When the number of imaging devices present in the image display area exceeds the predetermined number, the thumbnail images of the images of the plurality of imaging devices are switched in the image display area in a predetermined order. A captured image display device characterized by generating a video signal to be displayed. The synthesizing unit adds, to the thumbnail image, notification information including transmission quality of the video imaged by the imaging device or error information of the imaging device to the video signal, and a plurality of imaging devices in the image display area. generating a video signal for displaying the notification information when a thumbnail image of an image of an imaging device having the notification information is displayed in the image display area when there is a shooting position. 2. The photographed image display device according to claim 1, wherein: A captured image display method for generating a video signal for displaying a thumbnail image of a video imaged by an imaging device on a map,
a synthesizing step of generating a video signal for synthesizing and displaying a thumbnail image of an image of the imaging device in an image display area provided corresponding to the shooting position of the imaging device on the map;
In the synthesizing step, if there are shooting positions of a plurality of imaging devices in the image display region, the image display region is divided to display thumbnail images of videos of the plurality of imaging devices in the divided regions. generate a signal,
In the synthesizing step, when the number of imaging devices present in the image display area is equal to or less than a predetermined number, the image display area is divided and thumbnail images of the images of the plurality of imaging devices are displayed in the divided areas. When the number of imaging devices present in the image display area exceeds the predetermined number, the thumbnail images of the images of the plurality of imaging devices are switched in the image display area in a predetermined order. A photographed image display method characterized by generating a video signal to be displayed. A captured image display program for generating a video signal for displaying a thumbnail image of a video imaged by an imaging device on a map,
causing a computer to execute a synthesizing step of generating a video signal for synthesizing and displaying a thumbnail image of an image of an imaging device in an image display area provided corresponding to a shooting position of the imaging device on a map;
In the synthesizing step, if there are shooting positions of a plurality of imaging devices in the image display region, the image display region is divided to display thumbnail images of videos of the plurality of imaging devices in the divided regions. generate a signal,
In the synthesizing step, when the number of imaging devices present in the image display area is equal to or less than a predetermined number, the image display area is divided and thumbnail images of the images of the plurality of imaging devices are displayed in the divided areas. When the number of imaging devices present in the image display area exceeds the predetermined number, the thumbnail images of the images of the plurality of imaging devices are switched in the image display area in a predetermined order. A photographed image display program characterized by generating a video signal to be displayed.

Images