基于同态滤波的彩色图像增强  

Color image enhancement method based on Homomorphic filtering

作　　者：田小平[1] 程新[1] 吴成茂[1] 刘一博[2] 

机构地区：[1]西安邮电大学电子工程学院,陕西西安710061 [2]国防信息学院作战训练教研室,湖北武汉430010

出　　处：《西安邮电大学学报》2015年第6期51-55,共5页Journal of Xi’an University of Posts and Telecommunications

基　　金：国家自然科学基金重点资助项目(61136002);陕西省自然科学基金资助项目(2014JM8331;2014JQ5183)

摘　　要：给出一种基于同态滤波的彩色图像增强算法。引入新的传递函数,改进同态滤波算法,用以增强低照度彩色图像的RGB各分量;将RGB图像转换到HSV彩色空间,保持色度和饱和度不变,利用对比度受限自适应直方图均衡法对亮度分量进行变换和分段线性拉伸;将HSV图像还原为RGB图像,得到增强图像。仿真结果显示,所给算法在提升图像亮度的同时,能够增强图像细节。A color image enhancement algorithm based on the homomorphic filtering is proposed. Firstly, by introducing a new transfer function the traditional homomorphic filtering algorithm is improved to enhance the RGB three components of color image. Secondly, the RGB image is converted to HSV color space. Hue and saturation maintained are unchanged, but the brightness component is enhanced by using CLAHE transform and piecewise linear stretch. Finally, the final color enhanced image is obtained by converting the HSV back to the RGB image. Simulation results show that the new algorithm can not only enhance the image brightness but also enhances image detail.

关 键 词：同态滤波 空间转换 对比度受限自适应直方图均衡法 图像增强 

分 类 号：TP751.1[自动化与计算机技术—检测技术与自动化装置]