Method and device for image color enhancement

Abstract

The invention discloses a method and device for image color enhancement, wherein the method includes: S1, collecting the color components of the image, and converting the color components from the RGB space to the HSV space, and obtaining the parameters of the HSV space as hue, saturation and brightness respectively ; S2. By judging the saturation of the HSV space, selectively performing a gain operation on saturation and brightness; S3. Converting the obtained HSV space parameters back to RGB space. After the above method converts the color components to the HSV space, first judge the value of the saturation, and use the early function to selectively perform the gain operation according to the result, instead of adding any judgment after conversion as in the prior art. Gain calculation can enhance the color of the image while avoiding the color cast of the pure gray scale and the oversaturation of the skin color in the image display.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a method and device for image color enhancement. Background technique [0002] With the development of display technology, users have higher and higher requirements for display picture quality, and bright colors can give people a better visual experience. Therefore, more and more LCD driver chips have added image color enhancement functions. . [0003] At present, there are two common image color enhancement methods: the first type of enhancement method does not carry out spatial conversion, and the R (Red, red), G (Green, green) and B (Blue, blue) in the image, that is, the three primary colors The components are scaled and shifted in the same way, so as to achieve the purpose of invariant hue; the second type of enhancement method is to convert the color components from the RGB space to other spaces, and perform corresponding calculations, and then convert back to RGB space. ...

AI Technical Summary

Problems solved by technology

The above-mentioned second method of color enhancement is better than the first method, and can enhance the color of the image. The purpose of color enhancement is to improve the display quality of the picture. Gain calculations are performed on all components after judgment, and the following problems will occur after color enhancement: If it is a pure color gray scale, if the saturation value is used for gain calculations, the displayed color will change, which will cause color shift in the pure color gray scale; if it is For color screens, the gain operation is performed on the saturation value, and the screen display such as skin color will produce oversaturation

[0004] Therefore, if the parameters of each component of the converted space are not analyzed and judged after the space conversion, the appropriate gain calculation cannot be performed, and the scheme of the gain calculation cannot be selected, which will further cause color shift and oversaturation, resulting in image distortion. decline in quality

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