颜色保持的图像增强算法  

Image Enhancement Method with Color Preserving

作　　者：王秋阳[1] 李仕[1] 陈小雕[2] 

机构地区：[1]杭州电子科技大学数字媒体与艺术设计学院,浙江杭州310018 [2]杭州电子科技大学计算机学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2016年第3期63-67,共5页Journal of Hangzhou Dianzi University：Natural Sciences

基　　金：浙江省自然科学基金资助项目(LQ13F020016)

摘　　要：提出一种具有颜色保持功能的彩色图像对比度增强算法,解决彩色图像增强过程中出现的颜色偏差问题,达到图像处理前后色差最小化的目的.对颜色失真的问题本质进行分析,并给出一种解决方案:使用均匀颜色空间CIELAB,保持色度分量不变,对L*通道进行直方图规定化的增强处理;为减少图像处理前后可能存在L*通道值变化过大而导致的色差增大,采用L*通道直方图分割的方法,对L*通道值的变化范围进行约束;同时采用图像分块融合的方法,增强图像细节信息.实验同时采用主观和客观评价的方式对算法进行对比评价.多组实验结果表明,该算法在彩色图像对比度增强的同时具有较好的颜色保持效果,也具有较高的鲁棒性.In this paper, we propose a color image contrast enhancement algorithm with color preserving to solve color preservation problem during color image contrast enhancement process. The aim is to minimize the color difference during image process, we expound and prove the essence of color distortion and give a solution： Using uniform color space CIELAB, applying the histogram specification to the L＂ channel; in order to reduce the color differences between the raw and the processed images, we take L ~ channel histogram segmentation method to constrain L＂ channel＇s value; we separate the image into block and fusion to enhance image details. At last, we make subjective and objective estimation between proposed algorithm and others＇ algorithms in experiment. Many groups of the experimental results show that proposed method achieved a better color preservation in images＇ contrast enhancement, and has better robustness.

关 键 词：对比度增强 直方图规定化 颜色保持 CIELAB颜色空间 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]