JP5072103B2 - Angle of view control apparatus and angle of view control method - Google Patents

Description

  The present invention relates to an angle-of-view control apparatus and an angle-of-view control method suitable for use in a monitoring system that displays images from a plurality of monitoring cameras on a single monitor.

  A conventional angle-of-view control device for a monitoring system performs a manipulation for editing correspondence data stored in a storage unit that stores correspondence data of parameters such as a camera, a display position on a monitor, and the number of pixels. It consists of an operation unit and a control unit that controls the camera to shoot with parameters based on the correspondence data stored in the storage unit. For a wide display area on the monitor, the number of frames and pixels By increasing the number of images and reducing the number of images in a narrow area, high-definition data is acquired only for a wide area video stream that places importance on monitoring, and control is performed to optimize the processing amount of the video data. (For example, refer to Patent Document 1).

JP 2007-214831 A

  However, in the conventional angle-of-view control device, camera control parameters are set according to the size of an area for displaying video on the monitor (hereinafter referred to as “video display area”). Although the load can be reduced, the size of the video display area on the monitor and the angle of view taken by the camera are different, so if you try to display the video display area to the full size, the display video will be distorted with the following pattern. There is.

  For example, if the number of pixels in the image display area on the monitor is smaller than the number of pixels in the image captured by the camera, the protruding area is cut or reduced to fit the size of the image display area on the monitor. However, if the image is cut, the field of view to be monitored is narrowed, and if the image is reduced, the image quality is deteriorated by thinning the image. If the number of pixels in the video display area on the monitor is larger than the number of pixels in the video shot by the camera, the display will be enlarged to match the size of the video display area on the monitor. Will be enlarged and will be difficult to see.

  The present invention has been made in view of such circumstances, and an angle-of-view control device and an angle-of-view control capable of performing control so that camera photographing can be performed with an angle of view suitable for the size of a video display area on a monitor. It aims to provide a method.

  An angle-of-view control device of the present invention is an angle-of-view control device that displays images of a plurality of monitoring cameras on a single monitor and controls the shooting operation of the camera according to a layout of a video display area on the monitor. It includes shooting camera identification information indicating a layout size that is an angle of view of a video display area to be displayed on the monitor from a plurality of monitoring camera configurations and identification information of the monitoring camera that is shooting a video to be output to the video display area Layout information generating means for generating display destination layout information, and camera control information for generating camera control information for determining an angle of view at the time of shooting of the monitoring camera based on the display destination layout information generated by the layout information generating means Generating means, camera control means for controlling the monitoring camera according to the camera control information generated by the camera control information generating means, and the monitoring A monitor output means for displaying said video receiving video from camera to corresponding video display area on the monitor, with a.

  According to this configuration, the surveillance camera is instructed to shoot at an angle of view that matches the size of the video display area to be displayed on the monitor. It is possible to provide an easy-to-read video to the user without performing processing.

  The camera control information generation means indicates a video type indicating JPEG (Joint Photographic Experts Group) or MPEG (Moving Picture Experts Group), and an image compression rate in the video type, in addition to the angle of view at the time of shooting by the surveillance camera. You may make it produce | generate the camera control information containing the frame rate which prescribes | regulates image quality and the data transmission amount of a video stream.

  Further, the camera control information generating means is a shooting range in which the aspect ratio is not changed from the area size of the detection area and the size of the video display area on the monitor when a person or a moving object is detected by the camera. May be obtained, and camera control information including the zoom magnification may be generated.

  According to this configuration, it is possible to acquire an image with an angle of view equivalent to the display area size while maintaining the aspect ratio with the detection area as the center, and thus it is easy to see the image to be watched.

  An angle-of-view control method of the present invention is an angle-of-view control method for displaying images of a plurality of surveillance cameras on a single monitor and controlling a photographing operation of the camera according to a layout of an image display area on the monitor, It includes shooting camera identification information indicating a layout size that is an angle of view of a video display area to be displayed on the monitor from a plurality of monitoring camera configurations and identification information of the monitoring camera that is shooting a video to be output to the video display area A layout information generating step for generating display destination layout information, and camera control information for generating camera control information for determining an angle of view at the time of shooting of the monitoring camera based on the display destination layout information generated in the layout information generating step A generation step, a camera control step for controlling the monitoring camera according to the camera control information generated in the camera control information generation step, and the monitoring A monitor output step of displaying said video receiving video from camera to corresponding video display area on the monitor, with a.

  According to this method, the surveillance camera is instructed to shoot at an angle of view that matches the size of the video display area to be displayed on the monitor. It is possible to provide an easy-to-read video to the user without performing processing.

  According to the present invention, control is performed so that the camera can be photographed with an angle of view suitable for the size of the video display area on the monitor, so that enlargement / reduction and partial cropping of the image are performed depending on the angle of view. In addition, it is possible to provide an easy-to-read video to the user.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a block diagram showing a schematic configuration of an angle-of-view control apparatus according to Embodiment 1 of the present invention. In this figure, an input device 109, a layout switching device 110, a monitor 111, and a plurality of monitoring cameras 112 are connected to the angle of view control device 101 of the present embodiment. The angle of view control device 101 and the plurality of monitoring cameras 112 are connected via a network 113.

  The angle-of-view control apparatus 101 according to the present embodiment determines a layout to be displayed on the monitor 111 from a plurality of camera configurations, and is generated by a layout information generation unit 102 that generates display destination layout information, and a layout information generation unit 102. The camera information generation unit 103 that generates camera control information of the monitoring camera 112 based on the display destination layout information, and the camera control information generated by the camera information generation unit 103 is given to the monitoring camera 112 via the network 113 and is monitored. 112, a camera control unit 104 that controls the video 112, a video stream transmitted from the monitoring camera 112, a monitor output unit 105 that displays the video stream on the monitor 111, and a video recording that records the video stream transmitted from each monitoring camera 112. Part 108.

  Layout information is input from the input device 109 to the layout information generation unit 102. In addition, a switching signal is periodically input from the layout switching device 110 to the layout information generation unit 102. Display destination layout information 106 generated by the layout information generation unit 102 is input to the camera information generation unit 103. The camera control information 107 generated by the camera control information generation unit 103 is input to the camera control unit 104. The camera control unit 104 gives the camera control information 107 input from the camera control information generation unit 103 to the monitoring camera 112 via the network 113 to control the monitoring camera 112. The monitor 111 displays the output video from the monitor output unit 105. The monitoring camera 112 has a network connection function, and communicates with the angle of view control apparatus 101 via the network 113.

  FIG. 2 is a diagram illustrating a specific example of a layout targeted by the layout information generation unit 102. A video display area is set in order to output video from a plurality of monitoring cameras 112 on one monitor 111. In this embodiment, a layout in the case of 6-screen display, 3-screen display, and 1-screen display is presented. is doing. Each video display area varies in size depending on the layout to be displayed. In general, a large-sized video display area is used when displaying a video to be watched by detecting a person during monitoring. In this case, the user can operate the input device 109 such as a keyboard or a dedicated controller to switch the layout or to specify a video to be watched. When the number of the monitoring cameras 112 is larger than the number that can be displayed on the monitor 111 at a time, the images to be displayed on each image display area are periodically switched. The switching signal at this time is transmitted from the layout switching device 110 to the layout information generating unit 102. A switching order and a switching time interval are scheduled in advance, and layout information is transmitted according to the schedule.

  FIG. 3 is a diagram illustrating a data configuration of the display destination layout information 106. In this figure, a screen ID 301 that is an identifier of a video display area in each of the layouts (1) to (4), a layout size 302 that is an angle of view of the video display area, and a monitoring camera that is shooting a video to be output to the video display area This is composed of a photographing camera ID 303 indicating an identifier 112, and is managed for each screen layout shown in FIG.

  FIG. 4 is a diagram illustrating a data configuration of the camera control information 107. In this figure, the shooting camera ID 401 indicating the identifier of the surveillance camera 112, the angle of view 402 at the time of shooting, the video type 403 indicating the video format such as JPEG or MPEG, the image quality 404 indicating the image compression rate in each video format, and the video stream It consists of a frame rate 405 that defines the data transmission amount.

  Next, the operation of the angle of view control apparatus 101 of the present embodiment will be described using the flowchart shown in FIG. In this figure, first, from the input device 109 or the layout switching device 110 to the layout information generation unit 102, layout selection information and association information between each video display area of the selected layout and the monitoring camera 112 that outputs the video. Is input (step S501). The layout information generation unit 102 generates display destination layout information 106 from the input information. For the display destination layout information 106 corresponding to the selected layout, the ID of the monitoring camera 112 associated with the photographing camera ID column 303 is registered. After registering the ID of the monitoring camera 112, the layout information generation unit 102 inputs the display destination layout information 106 to the camera information generation unit 103 and notifies that the layout has been updated. The camera information generation unit 103 extracts the shooting camera ID 303 and the contents of the layout size column 302 in the display destination layout information 106, and generates camera control information 107 for each monitoring camera 112 (step S502).

  Here, an example of how to generate the camera control information 107 is shown below. As the angle of view, the layout size in the display destination layout information 106 is set. The video type, image quality, and frame rate are determined in association with the layout size. For example, a VGA (Video Graphics Array) size with a small video display area is set to a low image quality (normal) and low frame rate in the MPEG4 format, and a JPEG, a high image quality, and a high frame rate are set for a 4 VGA size with a large display area. Set.

  The camera information generation unit 103 inputs camera control information to the camera control unit 104. The camera control unit 104 transmits camera control information to each monitoring camera 112 via the network 113 (step S503), and then sends a shooting start signal. Thereafter, the video stream sent from each monitoring camera 112 is received (step S504) and stored in the video recording unit. The monitor output unit 105 reads the image stored in the video recording unit 108 and displays it on the monitor 111 (step S505).

  For the monitoring camera 112 that is not displayed in the selected layout, it is possible to reduce the load on the network 113 by instructing the camera control unit 104 to stop supplying the video stream. In that case, it can be realized by taking a means such as providing a used / unused flag in the camera control information 107. In addition, even when the layout shown in FIG. 2 is dynamically generated, camera control at an angle of view that does not depend on a specific size such as VGA or 4VGA by dynamically generating the display destination layout information 106. Is also possible.

  As described above, according to the angle of view control apparatus 101 of the present embodiment, the monitoring camera 112 is instructed to shoot at an angle of view that matches the size of the video display area displayed on the monitor 111. Therefore, it is possible to provide an easy-to-read video to the user without performing enlargement / reduction or partial cropping of the image.

(Embodiment 2)
FIG. 6 is a block diagram showing a schematic configuration of an angle-of-view control apparatus according to Embodiment 2 of the present invention. An input device 109, a layout switching device 110, a monitor 111, and a plurality of monitoring cameras 112 are connected to the angle of view control device 115 of the present embodiment. The angle-of-view control device 115 and the plurality of surveillance cameras 112 are connected via a network 113.

  The difference from the angle of view control apparatus 101 of the first embodiment shown in FIG. 1 is that the detection information 601 when a specific subject such as a person is detected by the monitoring camera 112 is managed in the angle of view control apparatus 115. 7, the detection area ID 304 is provided in the display destination layout information 106, and the magnification designation 406 for zooming the detection area is provided in the camera control information 107 as shown in FIG. 8. FIG. 9 is a diagram illustrating a data configuration of the detection information 601. In this figure, a detection area ID 901 that is an identifier of the detection area, a screen ID 902 that is an identifier of the display area in each layout, a rectangular upper left coordinate value 903 that indicates the detection area when the upper left of the display area is the base point, a detection area The detection area size 904 indicates the width and height of the image.

  Next, the operation of the view angle control device 115 will be described with reference to the flowchart shown in FIG. In this figure, when the monitoring camera 112 detects a subject such as a person or a moving object, the detection information 601 transmitted from the monitoring camera 112 is received (step S1001), and the monitor output unit 105 receives the detection information 601. A rectangle is displayed on the monitor 111. When the user operates the input device 109 to select the detection area displayed on the monitor 111, the detection area is input from the input device 109. When the detection area selected by the user is input, the layout information generation unit 102 acquires detection area information (step S1002). Then, after determining which video display area the video focused on the detection area selected by the user is output, the content is reflected in the detection area ID column 304 of the display destination layout information 106 (step S1003). For example, it is possible to update only the detection area without changing the screen layout, or to switch to a three-screen or one-screen display layout and project the image on a 4-VGA size area. This rule is determined in advance and operates based on the contents.

  Thereafter, the layout information generation unit 102 notifies the camera information generation unit 103 that the display destination layout information 106 has been updated. The camera information generation unit 103 acquires the corresponding shooting camera ID 303 for the row in which the detection area ID 304 is set from the display destination layout information 106. Further, the detection area 903 and the detection area size 904 are acquired by referring to the detection information 601 based on the detection area ID 901. Based on the acquired detection area information, the zoom ratio of the surveillance camera 112 is calculated in a form that maintains the aspect ratio in comparison with the angle of view 402 to be photographed (step S1004). The calculation method in this case is calculated from the ratio with the size of the original detection area in such a manner that the longer one of the detection areas is matched with the video display area. If the horizontal x vertical size of the detection area is 60 x 120 and the field angle of the display destination is 4 VGA, set the 8x zoom so that the vertical size of the detection area is 960, which is the vertical size of 4 VGA. This is performed in the magnification field 406 of the camera control information 107. After the setting is completed, the camera control unit 104 is notified. The camera control unit 104 controls the monitoring camera 112 based on the camera control information 107 (step S1005).

  As described above, according to the angle-of-view control device 115 of the present embodiment, when the subject detected by the monitoring camera 112 is enlarged and displayed, an image captured at an angle of view that matches the size of the display area while maintaining the aspect ratio. Therefore, it is possible to provide an easy-to-view video by avoiding difficult-to-view video display by enlargement / reduction and the like. A specific example is shown in FIG. Conventionally, as shown in FIG. 11A, the aspect ratio is lost when the size is adjusted to the size in the video display area. However, as shown in FIG. 11B, the aspect ratio is maintained while maintaining the aspect ratio. Display in size.

  Note that in this embodiment, the monitoring camera 112 to be zoomed can also be performed by an adjacent monitoring camera 112 that is different from the monitoring camera 112 that detects the subject, and the overhead video and the zoomed video are simultaneously displayed. It can also be displayed. In addition, by performing this in a nested manner, it is possible to simultaneously display a zoomed image such as a bird's-eye view image, an image of a detected object such as a person, and an image of a further portion of the detected object that should be watched. It becomes. As an example of the video to be watched, in the case of person detection, it is conceivable to further detect the face portion of the person and zoom the face image for display.

  The present invention has the effect of avoiding the enlargement / reduction display due to the mismatch of the size of the video display area on the monitor and the angle of view of the video from the monitoring camera, and capable of displaying without degradation of the image quality. This is useful as a monitoring system or the like that displays the video on the monitor.

1 is a block diagram showing a schematic configuration of an angle-of-view control apparatus according to Embodiment 1 of the present invention. Specific diagram of display layout by field angle control device according to embodiment 1 of the present invention Data configuration diagram of display destination layout information used in the angle of view control apparatus according to the first embodiment of the present invention. 1 is a data configuration diagram of camera control information used in an angle of view control apparatus according to Embodiment 1 of the present invention. The flowchart for demonstrating operation | movement of the view angle control apparatus which concerns on Embodiment 1 of this invention. The block diagram which shows schematic structure of the view angle control apparatus which concerns on Embodiment 2 of this invention. Data configuration diagram of display destination layout information used in an angle of view control apparatus according to Embodiment 2 of the present invention Data configuration diagram of camera control information used in an angle of view control apparatus according to Embodiment 2 of the present invention Specific view of display form by field angle control device according to embodiment 2 of the present invention The flowchart for demonstrating operation | movement of the view angle control apparatus which concerns on Embodiment 2 of this invention. Data configuration diagram of detection information of the angle of view control device according to the second embodiment of the present invention

Explanation of symbols

101, 115 Angle of view control device 102 Layout information generation unit 103 Camera information generation unit 104 Camera control unit 105 Monitor output unit 106 Display destination layout information 107 Camera control information 108 Video recording unit 109 Input device 110 Layout switching device 111 Monitor 112 Monitoring camera 113 Network 601 Detection information

Claims (4)

An angle-of-view control device that displays images of a plurality of surveillance cameras on a single monitor, and controls a shooting operation of the camera according to a layout of a video display area on the monitor,
It includes shooting camera identification information indicating a layout size that is an angle of view of a video display area to be displayed on the monitor from a plurality of monitoring camera configurations and identification information of the monitoring camera that is shooting a video to be output to the video display area Layout information generating means for generating display destination layout information;
Camera control information generating means for generating camera control information for determining an angle of view at the time of shooting of the monitoring camera based on display destination layout information generated by the layout information generating means;
Camera control means for controlling the surveillance camera according to the camera control information generated by the camera control information generation means;
Monitor output means for receiving video from the monitoring camera and displaying the video in a corresponding video display area on the monitor;
An angle of view control device.   The camera control information generating means includes, in addition to the angle of view at the time of shooting by the surveillance camera, a video type indicating JPEG or MPEG, an image quality indicating an image compression rate in the video type, and a frame that defines a data transmission amount of the video stream The field angle control device according to claim 1, wherein camera angle control information including a rate is generated.   The camera control information generation means obtains a shooting range in which the aspect ratio is not changed from the size of the detection area when a person or a moving object is detected by the camera and the size of the video display area on the monitor. The angle-of-view control device according to claim 1, wherein a zoom magnification to be obtained is obtained, and camera control information including the zoom magnification is generated. An angle-of-view control method for displaying images of a plurality of surveillance cameras on a single monitor, and controlling a photographing operation of the camera according to a layout of a video display area on the monitor,
It includes shooting camera identification information indicating a layout size that is an angle of view of a video display area to be displayed on the monitor from a plurality of monitoring camera configurations and identification information of the monitoring camera that is shooting a video to be output to the video display area A layout information generation step for generating display destination layout information;
A camera control information generating step for generating camera control information for determining an angle of view at the time of shooting of the monitoring camera based on the display destination layout information generated in the layout information generating step;
A camera control step of controlling the surveillance camera according to the camera control information generated in the camera control information generation step;
A monitor output step of receiving video from the monitoring camera and displaying the video on a corresponding video display area on the monitor;
Angle-of-view control method.

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