摘要： 为保持彩色图像增强时色调不变，提出一种基于RGB灰度值缩放的彩色图像增强算法。采用二次函数增强像素RGB三基色的最大值，获得缩放因子k，利用k值增强相应像素的RGB灰度值。实验结果表明，该算法能增强不同压缩比的彩色图像，综合性能优于现有算法。

关键词: 彩色图像增强, RGB色彩空间, 二次函数, JPEG图像, 压缩质量

Abstract: In order to remain the hue invariability during the color image enhancement, this paper presents an enhancement algorithm of color image based on RGB gray value scaling. It uses the twicing function to enhance the maximum of RGB pixel values, and gets the scaling k to adjust the RGB value with gain acquired. Experimental results show that the algorithm is efficient for enhancement of color image with compression at different quality, and outperforms the existing algorithm in most cases.

Key words: color image enhancement, RGB color space, twicing function, JPEG image, compression quality

中图分类号: 

• TP391. 41