Effective image area detection method and system

A detection method and effective area technology, which are applied in the field of image effective area detection methods and systems, and can solve problems such as the existence of black borders in images and different display positions.
CN102111640BInactive Publication Date: 2012-10-03GUANGDONG VTRON TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGDONG VTRON TECH CO LTD
Publication Date
2012-10-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an effective image area detection method and an effective image area detection system. By the method and the system, the aims of automatically identifying the effective area of an analogue signal and regulating an optimal display position are fulfilled, and the problem of blackedging in the display of the analogue image signal is effectively solved. The method comprises the following steps of: detecting whether image data corresponding to each pixel clock belongs to an effective image or not, and recording coordinate values of the image data; taking counted minimum rowand column coordinates as starting coordinates of the effective image area, and taking counted maximum row and column coordinates as the ending coordinates of the effective image area; and finally making a range judgment on a detection result, and outputting an effective signal if a range is legal.
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Description

technical field

[0001] The invention relates to the field of image display, in particular to a method and system for detecting an effective area of ​​an image. technical background

[0002] At present, the transmission and restoration of analog image signals (ARGB and CVBS, etc.) do not have an effective image indication signal (DE), so when the display terminal displays the analog signal, it is based on a preset (empirical value) effective display area or by manually setting the effective display area. For the various signal source devices on the market (such as computer graphics card and DVD, etc.), there is no unique standard to specify the area of ​​effective analog image signals at various resolutions, so different analog signal sources can be displayed on the same display terminal. When displaying, the display position of the image may be different. The most obvious manifestation is that there are black borders around the image. Contents of the invention

[0003] T...

Claims

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