JPH07322239A - Method for displaying monitor video and monitoring device - Google Patents

Abstract

PURPOSE:To allow a supervisor to always monitor a video of all monitor cameras by overlappingly displaying a synthesized pattern of plural monitor camera videos onto a monitor video displayed in the size of a full screen. CONSTITUTION:This device is provided with an image changeover means 113 selecting image data from plural monitor cameras 101-104 and with a superimposing means 115 superimposing each of image data onto image data outputted from an image synthesis means 114 synthesizing the image data. Even when the image data outputted from the image changeover means 113 are displayed in a size of a full screen of a display device 117 and supervised, the superimposing means 115 displays the synthesis image of all monitor cameras synthesized by the image synthesis means 114 superimposingly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building surveillance system, and more particularly to a display method and a display device for displaying surveillance images of a plurality of monitored regions on one display device.

[0002]

2. Description of the Related Art Conventionally, a surveillance system for displaying surveillance video from a plurality of locations on a single display device is disclosed in Japanese Patent Laid-Open No. 4-28059.
There is a monitoring ITV system described in Publication No. 4. In this system, as shown in FIG.
To 104 are provided with A / D converters 105 to 108 and frame memories 109 to 112 for storing image data, and a screen reduction synthesis circuit 302 for reducing and synthesizing the image data read from the respective frame memories 109 to 112. And the monitor images at a plurality of locations are displayed on a single display device 117. Further, since the selection circuit 301 is provided for switching and displaying the image data from each of the monitoring cameras 101 to 104 and the image combined by the screen reduction combining circuit 302, the combined image or individual images are provided. It can be selected and displayed.

[0003]

In the above-mentioned prior art, since a plurality of surveillance images can be displayed on one display device, the observer can easily grasp the whole situation and synthesize the individual images. Since it is also possible to switch between images, it is possible to monitor images from a specific camera in a concentrated manner. However, since the video to be displayed on the display device is switched by the video selection circuit, the video of another camera cannot be monitored while the video from a specific camera is being displayed.

An object of the present invention is to provide a surveillance system capable of displaying a plurality of surveillance videos on a single display device, even if the videos from a specific camera are being intensively monitored, they are still monitored by other cameras. An object of the present invention is to provide a surveillance device capable of displaying the surveillance video of and the display method thereof.

[0005]

In order to achieve the above-mentioned object, a monitor image display device of the present invention has an image switching means for switching image data from a plurality of surveillance cameras and an image for synthesizing each image data. Even when the synthesizing means and the superimposing means for superimposing the image data output by the two means are provided, and the image data output by the image switching means are displayed in the size of the entire screen of the display device and monitored, The images synthesized by the image synthesizing means are always superimposed and displayed.

[0006]

According to the present invention, the images from the plurality of surveillance cameras combined by the screen combining means are displayed by the overlapping means on the image selected by the image selecting means. Even when the image from the surveillance camera is displayed on the entire screen of the display device, the video from another surveillance camera can be monitored.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of the present invention. In the figure, 101 to 104 are surveillance cameras installed at a plurality of locations in the surveillance area. 105-108
Is an A / D converter that converts an analog video signal captured by the surveillance cameras 101 to 104 into a digital video signal, 10
Reference numerals 9 to 112 are frame memories for storing the images captured by the monitoring cameras 101 to 104 and converted into digital signals, and 113 is for selecting and displaying the image data read from the frame memories 109 to 112. Image selecting means 114 is an image combining means for combining the image data read from the frame memories 109 to 112 to generate image data for one screen, and 115 is an image selecting means 113.
Superimposing means for superimposing the image data selected by and the image data synthesized by the image synthesizing means 114, 116
Is a position control means for controlling the superposition position when the superposition means 115 superimposes the images, and 117 is a monitor image display means. A size control unit 118 controls the display size of the image combined by the image combining unit 114.

Each of the surveillance cameras 101 to 101 placed in the surveillance area
The monitoring images from the A / D converters 105
To 108 are converted into digital video signals and stored in the frame memories 109 to 112. The respective image data stored in the frame memories 109 to 112 are read out according to the scanning of the display device 117, and the image selection means 113.
And the image synthesizing means 114 at the same time. The image selection means 113 switches the image data in response to the operation by the monitor. On the other hand, each image data input to the image synthesizing unit 114 is reduced and synthesized by the size control unit 118. In the superposition means 115, according to the control of the superposition position by the position control means 116,
The image data selected by the image selecting unit 113 and the image data combined by the image combining unit 114 are superimposed. The image superposed by the superposing means 115 is D
The signal is converted into an analog video signal by the / A converter 119 and displayed on the display device 117.

FIG. 2 shows a display example of the surveillance video according to the embodiment of the present invention. FIG. 11A shows a display state in a normal monitoring state, and 201 is a composite screen combined by the screen combining means. 202a-202d
Is a surveillance image from four cameras. As shown in the figure, the monitor images 202a to 202d are combined and displayed in a quarter area of the entire screen. Further, FIG. 11B shows a case where the monitor video 202b is displayed on the entire screen and monitored as one of the display modes of the monitor video. In this case, the composite screen 201 is made smaller than usual and the monitoring video 2 is displayed.
It is displayed by being superimposed on 02b.

[0011]

According to the present invention, since a composite screen of a plurality of surveillance camera images and individual selectively displayable surveillance images are displayed in an overlapping manner, a specific surveillance image is displayed on the entire screen of the display device. Even when it is displayed, the images of other surveillance cameras can be displayed, and the observer can always monitor the images of all surveillance cameras.

[Brief description of drawings]

FIG. 1 is a block diagram of a monitoring system of the present invention.

FIG. 2 is an explanatory diagram showing a display example of the monitoring system of the present invention.

FIG. 3 is a block diagram of a conventional monitoring system.

[Explanation of symbols]

101-104 ... Surveillance camera 105-108 ... A / D
Converters 109 to 112 ... Frame memory 113 ... Image selecting means 114 ... Image combining means 115 ... Overlaying means 116 ... Position control means 117 ... Display device 11
8 ... Size control means.

Claims (2)

[Claims] 1. A plurality of imaging means for imaging the inside of a monitoring area,
A screen synthesizing unit for synthesizing the video signals output by the plurality of image pickup units, a selection unit for selecting one of the video signals output by the plurality of image pickup units, and a video signal output by the screen synthesizing unit. A video signal output by the selecting means, comprising superposition means for superposing the video signal output by the selection means to generate one screen and display means for displaying the video signal output by the superposition means. The method of displaying a surveillance image, comprising: superimposing a screen of a video signal output by the screen synthesizing unit on the screen and displaying the screen on the display unit. 2. A plurality of imaging means for imaging the inside of the monitoring area,
A screen synthesizing unit for synthesizing the video signals output by the plurality of image pickup units, a selection unit for selecting one of the video signals output by the plurality of image pickup units, and a video signal output by the screen synthesizing unit. A monitoring device comprising: superimposing means for superimposing the video signals output by the selecting means to generate one screen, and display means for displaying the video signal output by the superimposing means.