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Color correction method for color face image

A color correction and color face technology, applied in the field of image processing, can solve the problems of high correction accuracy of the facial features area, affect the correction effect of the entire face image, and low accuracy of the facial features area correction, so as to ensure the overall coordination and improve the correction The effect of precision

Inactive Publication Date: 2017-03-22
SHANGHAI EAST HOSPITAL +1
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AI Technical Summary

Problems solved by technology

If the same color block is used for color correction of all facial features, it will inevitably result in high correction accuracy for some facial features areas, and low calibration accuracy for some facial features areas, thus affecting the correction effect of the entire face image

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  • Color correction method for color face image
  • Color correction method for color face image

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Embodiment Construction

[0028] The embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings, but the present embodiments are not intended to limit the present invention. All similar structures and similar changes of the present invention should be included in the scope of protection of the present invention. The commas in all indicate the relationship between and.

[0029] like figure 1 As shown, the method for color correction of a color face image provided by the embodiment of the present invention is characterized in that the specific steps are as follows:

[0030] S1: Use the facial features segmentation method to segment the face image into six target areas: eyes, ears, mouth, nose, eyebrows, and skin;

[0031] S2: Project the RGB color space pixels of each target partition to the CIE Lab color space respectively to obtain the color gamut space of each target partition, and then extract the boundary pixels of the color gamut space ...

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Abstract

The invention, which relates to the image processing technology, provides a color correction method for a color face image. With the provided method, the color correction precision is improved. Firstly, a face image is segmented into six target divided regions: an eye region, an ear region, a mouth region, a nose region, an eyebrow region, and a skin region by using a face five-sense-organ segmentation method; secondly, color blocks falling into all target divided region color ranges are selected from a color correction colour atla; thirdly, optimal color block sub sets of all target divided regions are selected by using a greedy searching algorithm, color correction models are established for all target divided regions at optimal color block sub sets of all target divided regions, and divided region color correction is carried out on a to-be-corrected color face image by using the established color correction models for all target divided regions. Therefore, the correction effect is closer to the practical face intrinsic color.

Description

technical field [0001] The invention relates to image processing technology, in particular to a color correction method for color face images. Background technique [0002] In some specific studies, it is often required that the image obtained by the image acquisition device has a high consistency with its inherent color. However, due to the influence of the acquisition device and the color temperature, color rendering and spatial distribution of the light source, there may be large differences in luminosity and chromaticity between the image collected by the image acquisition device and its intrinsic color. Therefore, it is usually necessary to perform color correction processing on the collected images in practical applications. [0003] At present, a commonly used image color correction method is to use a color correction color card to perform color correction on a distorted color image. In the color correction of the face color image, the color gamut of the color corre...

Claims

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Application Information

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IPC IPC(8): G06T7/90G06T7/11G06T7/187
CPCG06T2207/10024
Inventor 李国正刘中民赵常博范慧敏牛金玲兰琴颜仕星
Owner SHANGHAI EAST HOSPITAL
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