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Adaptive flesh colour compensation method

A compensation method and self-adaptive technology, applied in the direction of color signal processing circuit, etc., to achieve the effect of compensating color distortion

Inactive Publication Date: 2011-01-26
SICHUAN PANOVASIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide an adaptive skin color compensation method for the problem of color deviation display of skin color when the image is displayed

Method used

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  • Adaptive flesh colour compensation method
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  • Adaptive flesh colour compensation method

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Embodiment Construction

[0023] Such as figure 1 As shown, the image signal in RGB format is low-pass filtered by using the shock response matrix, and then the color space is converted from RGB to YCbCr space. Then carry out skin color detection, through the formula P(Cb, Cr)=exp[-0.5(x-m) T C -1 (x-m)], x=(CbCr) T , calculate the likelihood value P of each pixel point, greater than or equal to the threshold value thresh is the skin color area, and perform skin color compensation; less than the threshold value thresh is the non-skin color area. When calculating, mean m=[121.1315146.6512], In order to reduce the amount of computation, the threshold thresh adopts a fixed threshold. After the skin color area is distinguished for each pixel of the image signal, the skin color compensation processing is performed on the chrominance signals Cb and Cr of the pixel points in the skin color area. In the skin color compensation processing, the Cb and Cr values ​​of the input pixels are automatically Adapt...

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Abstract

The invention relates to the technical field of digital image processing and video displaying, in particular to an adaptive complexion compensation method that promotes the complexion display effect of an image. Aiming at the problem that deviated complexion color display appears when the image is displayed, the invention provides an adaptive complexion compensation method. The adaptive complexion compensation method of the invention is characterized by comprising the steps as follows: a. the chroma space of image signals is transformed to YCbCr space; b. complexion area partition is carried out to each pixel point of the image signals; c. complexion compensation processing is carried out to the chroma signals Cb and Cr in the complexion area; d. the image signals are output. The method of the invention is used in the image displaying field and has the advantages of rectifying and compensating the color distortion of the complexion area when the image is displayed.

Description

technical field [0001] The invention relates to the technical field of digital image processing and video display, in particular to an adaptive skin color compensation method for improving the skin color display effect of images. Background technique [0002] In image processing, skin color segmentation is to use a suitable model to describe the regional distribution of skin color and the overlap between skin color and non-skin color in a certain chromaticity space. Through statistical analysis of a large number of skin color pixel sets, it is determined that a model can Describe the similarity between the input pixels and the skin color, and segment the skin color area. The skin color is in a fixed frequency domain, and the pixels are relatively concentrated and stable. The difference in race, age, and gender is mainly reflected in the brightness, but the color is very compact, so the color of the pixel can be used to determine the color of the skin. areas and non-skinned ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/64
Inventor 赵勃高福均
Owner SICHUAN PANOVASIC TECH