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Method and device for changing image length-width ratio in video signals of security system

A technology of video signal and security system, applied in image communication, CCTV system, TV and other directions, can solve problems such as image distortion

Inactive Publication Date: 2012-05-09
SHENZHEN ADVANCE RIVER SYST TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method based on the existing camera and display for the above-mentioned defects in the prior art that the image is deformed when displayed due to the different aspect ratios of the image captured or displayed by the camera and the display. Method and device for changing the aspect ratio of an image in a video signal of a security system without deforming the image when displayed

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  • Method and device for changing image length-width ratio in video signals of security system
  • Method and device for changing image length-width ratio in video signals of security system
  • Method and device for changing image length-width ratio in video signals of security system

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Embodiment Construction

[0042] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0043] like figure 1 As shown, in the first embodiment of the present invention, the method for changing the video image aspect ratio in the security system includes the following steps:

[0044]Step S11 The camera obtains an image signal whose pixel aspect ratio is w / v: In this step, the camera in the security system obtains the image of the monitored area. Generally speaking, in the existing security system, the camera is basically CCD is used as the photosensitive element, and usually the pixels of the images obtained by it vary with different cameras, but the aspect ratio of the pixels is usually 4 / 3. After the camera obtains the image signals of these monitoring areas, it is processed inside the camera and transmitted as a video signal according to the signal format set by the camera. Wherein, w is the pixel value of the length of the image obtain...

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Abstract

The invention relates to a method for changing the image length-width ratio in video signals of a security system. A security device comprises a camera and a display device. The method comprises the following step of: before or after converting video signals into complex video signals, converting the video signals with the length-width ratio being w / v into the video signals with the length-width ratio p / q through cutting, wherein p refers to the length of an image represented by the cut video signals, and q refers to the width of the image represented by the cut video signals. The invention further relates to a device for changing the image length-width ratio in the video signals of the security system. After the method and the device for changing the image length-width ratio in the video signals of the security system in the invention are implemented, the beneficial effect that the image signals cannot undergo display deformation in the traditional security system can be achieved.

Description

technical field [0001] The invention relates to the field of security protection, and more specifically relates to a method and a device for changing the aspect ratio of an image in a video signal of a security system. Background technique [0002] In the security system, it is often necessary to obtain images of the surveillance area, store these images and display them on the monitor. Usually, in the existing security system, the image signal of the monitoring area is obtained through the camera, and then these images are displayed on the monitor, which is convenient for monitoring the above-mentioned monitoring area. Because there is a certain distance between the camera and the display, the usual method is to convert the obtained image signal into an analog composite video signal (ie, CVBS signal), and then transmit the composite video signal to the display and display it. Generally speaking, the aspect ratio of the image obtained by the camera is certain. For exam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/18H04N7/26
Inventor 张日和陈冠波
Owner SHENZHEN ADVANCE RIVER SYST TECH CO LTD
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