JP2011082676A - Function to perform partially enlarged display of monitoring image in cctv system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a CCTV (Closed Circuit Television) system which performs monitoring by a simple operation so that a user selects an area to be enlarged on a display screen of the display device of a monitoring terminal side, and can simultaneously monitor the area together with a whole image. <P>SOLUTION: A first camera is controlled to photograph a whole monitoring place, and a second camera is controlled so as to photograph a part of the whole image. And, two monitors are prepared in the monitoring terminal side, a first monitor displays the whole monitoring place, and a second monitor enlarges and displays an image in a frame specified from the first monitoring screen for simultaneous monitoring with the whole image. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a CCTV system, and more particularly to display of a monitoring image of a CCTV system.

  In a conventional CCTV (Closed Circuit Tele-Vision) system, when a specific part is enlarged and displayed, a user operates the buttons on the operation unit or the GUI (Graphical User Interface) to operate the lens of the CCTV camera. Since the zoom-up operation is performed, the operation is troublesome. Also, since it is not possible to monitor the whole image and the enlarged image at the same time, you do not know what part of the whole is being monitored, perform a wide-angle operation once, display the whole image, then perform a zoom-up operation again, etc. The work was cumbersome and time consuming.

JP 2001-128057 A Japanese Patent Laid-Open No. 9-275520

Patent Document 1 describes a method and apparatus for controlling one or more cameras. In particular, regarding the control of camera parameters (camera pan, angle, zoom, etc.) to be photographed, an interface including a pen-based, lighting, and gesture-based control interface is disclosed. In Japanese Patent Laid-Open No. 2004-260260, since the interface can appropriately control a plurality of cameras, even a user who has no experience can create a high-quality video.
Patent Document 2 describes a camera control device that controls the imaging orientation (pan, tilt) and the zoom magnification of a plurality of cameras. Especially in the case of remotely controlling a plurality of cameras, according to the target position that the user is interested in, first, in order to select an appropriate camera, information on the shootable range of each camera is presented to the user in an easy-to-understand manner, Using multiple video cameras juxtaposed so that the field of view is continuous, when shooting while tracking a moving subject, etc., while sequentially switching the camera to be remotely operated or to display the captured image, Describes techniques for performing necessary camera operations.
In the prior art including Patent Documents 1 and 2, it is intended to provide an interface that can be used by a user including a beginner so as to respond to various requests to control a plurality of cameras. However, when a CCTV camera is used in a normal surveillance application in a CCTV system, the above-described various controls by complicated operations are not so necessary. Rather, there is a high possibility that the CCTV camera pan or tilt direction or zoom magnification changes due to a slight difference in operation, and the monitoring target is lost.
An object of the present invention is to provide a CCTV system that performs monitoring with a simple operation so that a user can select an area to be enlarged on a display screen of a display device on the monitoring terminal side and monitor the entire image simultaneously. There is.

In order to solve the above problems, the CCTV system of the present invention allows the user to select an area to be enlarged on the display screen of the display device on the monitoring terminal side and instantly display an image of the area to be monitored. And can be monitored simultaneously with the entire image.
In other words, the CCTV system of the present invention controls the first camera that captures the entire monitoring location, the second camera that can change the angle of view that captures a portion of the monitoring location, and the first camera. A first camera control unit; a second camera control unit that controls the second camera; a first monitor that displays an image captured by the first camera; and the second camera control unit. In the CCTV monitoring system including one camera, the second camera, the first camera control unit, and a monitoring station connected to the second camera control unit via a network, the monitoring station A first monitor that displays an image captured by the first camera; a second monitor that displays an image captured by the second camera; and the second monitor on a display screen of the first monitor. Specify the frame to display on the monitor An operation unit for outputting, a WEB server that outputs a position and size of a frame designated by the user's operation from the console, and the first camera and the second from the position and size of the designated frame An angle-of-view calculating device that calculates the amount of movement of the angle of view of the camera, and a camera control server that transmits a control signal to the second camera control unit of the second camera. The second camera control unit changes the angle of view of the second camera based on the control signal, and the second camera transmits an image captured after the angle of view change to the monitoring terminal. The video taken after changing the angle of view is enlarged and displayed on the second monitor.

According to the present invention, for example, the operability of the CCTV system can be improved as follows.
(1) In river monitoring, an overall view of a river and a water level indicator can be displayed at the same time, and the user (monitor) does not need to perform operations such as controlling the CCTV camera or switching the CCTV camera and displaying the screen.
(2) In facility monitoring, the entire room and the measurement meter can be displayed at the same time, and the user does not need to perform operations such as controlling the CCTV camera and switching the CCTV camera and displaying the screen.
(3) In the road surface monitoring, the entire road and falling objects can be displayed at the same time, and the user does not need to perform operations such as controlling the CCTV camera or switching the CCTV camera and displaying the screen.

It is a block diagram which shows the structure of one Example of the CCTV system of this invention. It is a flowchart for demonstrating the signal flow of one Example of the CCTV system of this invention. It is a figure which shows one Example of the monitor display screen of the monitoring terminal of the CCTV system of this invention.

The present invention is a CCTV system capable of simultaneously monitoring a partially enlarged image and an entire image of a CCTV image captured on the display screen of a display device on the monitoring terminal side. That is, the first camera is controlled so as to capture the entire monitoring location, and the second camera is controlled so as to capture a part thereof. Then, two monitors are provided on the monitoring terminal side, the first monitor displays the entire monitoring location, and the second monitor enlarges and displays the image of the frame specified from the first monitor screen. It was made possible to monitor simultaneously with images.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of each drawing, components having common functions are denoted by the same reference numerals, and the description thereof is omitted to avoid duplication as much as possible.

  An embodiment of the CCTV system of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing the configuration of an embodiment of the CCTV system of the present invention. 11 is a swivel camera for outdoor use, 12 is a swivel camera for outdoor use, 13 is a camera control unit, 14 is an IP encoder, 15 is a camera control server, 16 is a view angle calculation device, 17 is a WEB server, 18 is a monitoring terminal, 19 is a monitor display screen, 20 is a red frame, 21 is a monitor display screen, 22 is an IP network, and 23 is a monitoring location. The camera control unit 13 that controls the camera 11 is referred to as a camera control unit 13-1, and the camera control unit 13 that controls the camera 12 is referred to as a camera control server 13-2. Further, the IP encoder 14 of the camera 11 and the camera control unit 13-1 is an IP encoder 14-1, and the IP encoder 14 of the camera 12 and the camera control unit 13-2 is an IP encoder 14-2. Further, the camera control server 15, the angle of view calculation device 16, the WEB server 17, and the monitoring terminal 18 constitute a monitoring station.

First, the function of each device constituting the CCTV system will be described.
In the CCTV system according to the embodiment of FIG. 1, two outdoor turning cameras (outdoor turning cameras 11 and 12) are installed for each monitoring place as shown by a monitoring place 23. The outdoor swivel cameras 11 and 12 are cameras that control the pan angle, tilt angle, or zoom magnification, for example, and change the angle of view for imaging. In this document, outdoor swivel cameras 11 and 12 are hereinafter referred to as camera 11 and camera 12.

The camera 11 captures the entire image and outputs the captured video signal to the IP encoder 14-1. The camera control unit 13-1 receives control data transmitted from the camera control server 15 via the IP network 22 and the IP encoder 14-1, controls the camera 11, and positional information of the camera 11 after control (for example, The turning angle (pan angle, tilt angle) and zoom magnification) are distributed to the angle-of-view calculating device 16 via the IP encoder 14-1 and the IP network 22. Similarly, the camera 12 has a telephoto lens (zoom magnification change) function, captures a portion of the capturing range of the camera 11, and outputs the captured video signal to the IP encoder 14-2. The camera control unit 13-2 receives control data transmitted from the camera control server 15 via the IP network 22 and the IP encoder 14-2, controls the camera 12, and controls data (for example, pan angle, (Tilt angle and zoom magnification) are distributed to the view angle calculation device 16 of the monitoring station via the IP encoder 14-2 and the IP network 22.
That is, the camera control unit 13-1 receives a control signal such as turning of the camera 11 from the camera control server 15 of the monitoring station via the IP network 22, and converts it into a signal for directly controlling the camera 11. Control. Similarly, the camera control unit 13-2 receives a control signal such as turning of the camera 12 from the camera control server 15 of the monitoring station via the IP network 22 and converts it into a signal for directly controlling the camera 12 to convert the camera 12 11 is controlled.
The IP encoder 14-1 distributes a video signal (for example, an NTSC signal) of an image captured by the camera 11 to the monitoring station via the IP network 22.
Similarly, the IP encoder 14-2 distributes a video signal (for example, NTSC signal) of an image captured by the camera 12 to the monitoring station via the IP network 22. Here, the image photographed by the camera 12 is an enlarged image of a part of the photographing range of the camera 11.

  The camera control server 15 is a device that controls control signals such as turning control of the camera 11 or 12 and zoom magnification. For example, the camera control server 15 sends a signal for changing the turning angle or zoom magnification of the camera 11 or 12 by the amount of movement calculated by the angle of view calculation device 16 via the IP network 22. -1 or 13-2. During normal operation, the angle of view of the camera 11 is fixed or preset at a predetermined time interval. In the following embodiment, it is assumed that the angle of view of the camera 11 is fixed and the entire predetermined range of angle of view (monitoring location 23) is imaged.

  The angle of view calculation device 16 is a device that receives position information transmitted from the camera side (camera control unit 13-1 or 13-2) and calculates the movement amount of the camera 12 from the angle of view of the cameras 11 and 12. is there. For example, the movement amount of the camera 12 is calculated from the position information of the cameras 11 and 12 sent from the camera control units 14-1 and 14-2 and the information operated on the monitoring terminal 18. The amount is transmitted to the camera control server 16 via the IP network 22.

The WEB server 17 is a device that provides a monitor display screen for operation on the monitor of the operation terminal 18.
The operation terminal 18 displays a monitor display screen for operating the cameras 11 and 12.
For example, the operation terminal 18 is an operation PC composed of two multi-monitors, and the monitor display screen 19 of one monitor performs display of an entire image and selection of an enlarged area, and the monitor display screen of another one monitor. 21 displays an enlarged image.

Next, an embodiment of the operation method of the present invention will be described using the CCTV system of FIG.
The monitor display screen 19 of the operation terminal 18 displays an entire image of the monitoring location 23 captured by the camera 11. For example, when the user drags (moves while pressing) the left button of a mouse (not shown) on the monitor display screen 19, the red frame 20 is displayed on the monitor display screen 19. In this state, when the left button of the mouse is released, the position and size of the red frame 20 are determined, the camera 12 is controlled by the camera, the angle of view is changed, and the image captured by the camera 12 after the angle of view is changed is displayed on the monitor. An enlarged image of the red frame 20 is displayed on the display screen 21.

The signal flow during the above operation is as follows. See the flowchart of FIG.
The monitoring terminal 18 designates the red frame 20 according to the designation of the user and outputs it to the WEB server 17 (step S201).
The WEB server 17 calculates the position and size of the red frame 20, and outputs the calculated position and size to the angle of view calculation device 16 (step S202).
The angle of view calculation device 16 calculates the movement amount of the angle of view of the camera 12 based on the coordinates of the red frame 20 and the current position information of the camera 11 and the camera 12 acquired from the camera control units 13-1 and 13-2. And output to the camera control server 15 (step S203).
The camera control server 15 outputs a camera control signal to the camera control unit 13-2 (step S204).
The camera control unit 13-2 controls the camera 12 and changes the angle of view (step S205).
After changing the angle of view, the camera 12 distributes the captured video to the IP network 22 (step S206).
An enlarged image of the red frame 20 is displayed on the monitor display screen 21 of the operation terminal 18 (step S207).

FIG. 3 is a diagram showing an embodiment of the display screen of the monitoring terminal 18 of the CCTV system of FIG. 31 is a console, and 32 is a mouse.
As shown in FIG. 3, the console 31 of the monitoring terminal 18 is connected to the IP network 22. Further, the console 31 is connected to the mouse 32, and the user can operate the graphic 32 displayed on the monitor display screen 19 by operating the mouse 32 interlocked with the cursor or the like shown on the display screen. it can.
On the monitor display screen 19, an entire image being captured by the camera 11 is displayed. The user operates the cursor 32 while viewing the monitor display screen 19 to select the portion 20 to be enlarged and viewed, for example, in a rectangular shape. By this operation, the camera 12 turns and changes the zoom magnification to change the angle of view. An image captured by the camera 12 after changing the angle of view is displayed on the monitor screen 21.
As a result, the user can view an enlarged image of the selected partial image on another monitor screen by selecting a partial image while displaying the entire field-of-view range screen on one of the monitor screens. , Improve monitoring efficiency,

As described above, in the description of the embodiments of FIGS. 1 to 3, the angle of view of the camera that captures the entire monitoring location is fixed. However, it is obvious that there is no need to fix the angle of view.
The display screen size of the monitor of the monitoring terminal is arbitrary.
In addition, the present invention is not limited to the above-described embodiment, and the present invention can be modified based on the spirit and spirit of the present invention as long as the person has ordinary knowledge in the technical field to which the present invention belongs. Of course, the invention which can be changed is included.

  According to the embodiment of FIGS. 1 to 3, for example, in river monitoring, an overall view of a river and a water level indicator can be displayed at the same time. For example, in equipment monitoring, an entire indoor unit and a measurement meter can be displayed at the same time. Further, for example, in road surface monitoring, the entire road and falling objects can be displayed at the same time, and the user does not need to perform operations such as controlling the CCTV camera and switching and displaying the CCTV camera on the screen. As a result, the operability of the CCTV system can be improved.

  11: Outdoor turning camera, 12: Outdoor turning camera, 13, 13-1, 13-2: Camera control unit, 14, 14-1, 14-2: IP encoder, 15: Camera control server, 16 : Angle of view calculation device, 17: WEB server, 18: monitoring terminal, 19: monitor display screen, 20: red frame, 21: monitor display screen, 22: IP network, 23: monitoring location, 31: console, 32: mouse.

Claims (1)

A first camera that captures the entire surveillance location, a second camera capable of changing the angle of view that captures a portion of the surveillance location, a first camera control section that controls the first camera, A second camera control unit that controls the second camera; a first monitor that displays an image captured by the first camera; the first camera of the second camera; the second camera; In the CCTV monitoring system comprising the first camera control unit and the monitoring station connected to the second camera control unit via a network,
The monitoring station includes a first monitor that displays an image captured by the first camera, a second monitor that displays an image captured by the second camera, and a display screen of the first monitor. An operation unit for designating a frame to be displayed on the second monitor, a WEB server for outputting the position and size of the frame designated from the console by a user operation, and the designated frame An angle-of-view calculating device for calculating the amount of movement of the angle of view of the first camera and the second camera from the position and size of the second camera, and the second camera of the second camera using the calculated amount of movement. A camera control server that transmits a control signal to the control unit;
The second camera control unit changes the angle of view of the second camera based on the control signal, and the second camera transmits an image captured after the angle of view change to the monitoring terminal. The CCTV system, wherein the video taken after the angle of view change is enlarged and displayed on the second monitor.

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