[1]段群,吴粉侠,李红. 双通道分块同态滤波彩色图像增强算法[J].计算机技术与发展,2016,26(01):82-85.
　DUAN Qun,WU Fen-xia,LI Hong. An Enhanced Algorithm of Color Image Based on Block Homomorphic Filter in Two Channels[J].,2016,26(01):82-85.
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 双通道分块同态滤波彩色图像增强算法()
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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:
26
期数:
2016年01期
页码:
82-85
栏目:
智能、算法、系统工程
出版日期:
2016-01-10

文章信息/Info

Title:
 An Enhanced Algorithm of Color Image Based on Block Homomorphic Filter in Two Channels
文章编号:
1673-629X（2016)01-0082-04
作者:
 段群; 吴粉侠; 李红
 咸阳师范学院 图形图像处理研究所
Author(s):
 DUAN Qun; WU Fen-xia; LI Hong
关键词:
 ; HSV 颜色模型; 同态滤波; 彩色图像增强; 块效应; 截至频率
Keywords:
 ; hue saturation value space; homomorphic filter; color image enhancement; block effect; cut-off frequency
分类号:
TP301.6
文献标志码:
A
摘要:
 为了有效增强由于光照不均的彩色图像，文中在应用 HSV 彩色模型空间的基础上，提出了一种基于双通道的分块同态滤波彩色图像增强算法。首先将光照不均源彩色图像从 RGB 色彩空间模型转换到 HSV 色彩空间模型。然后为了弥补光照不足引起的图像亮度不均，对变换后的亮度分量做分块巴特沃斯高通同态滤波，之后会出现轻微块效应，为了去除块效应，对相邻子图像边界处亮度值采用3×3邻域均值的亮度值代替；接着为了提高图像的整体对比度，对变换后的饱和度分量做全局巴特沃斯高通同态滤波以便微调增强效果。最后，再将图像从 HSV 色彩空间模型还原到 RGB 色彩空间模型。实验结果表明，该算法不仅增加了图像暗区域明亮度，而且颜色保持较好，纹理更清晰。
Abstract:
 A new enhanced method of non-uniform illumination color image based on block homomorphic filter in two channels was presented on basis of applying HSV color model space. First,a color image is transformed from RGB color space to HSV color space. Then,luminance channel is blocked and enhanced by Butterworth highpass homomorphic filter to compensate for the non-uniform illumi-nation due to lack of light,and the block effect caused by blocking homomorphic filter process is removed by the method of averaging the 3*3 adjacent sub-images boundaries. The saturation channel is slightly enhanced by Butterworth highpass global homomorphic filter to increase image contrast. Last,the color image is transformed from HSV color space to RGB color space. Experiments illustrate that this al-gorithm can not only correct non-uniform illumination in images,but also maintain a good image color and the local details.

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更新日期/Last Update: 2016-04-12