模拟频域滤波重构直方图均衡的图像增强方法 image enhancing method based on reconstructed histogram equalization after simulated frequency domain filter.pdfVIP

第 34 卷第 3 期 光电工程 Vol.34, No.3 2007 年 3 月 Opto-Electronic Engineering March, 2007 文章编号：1003-501X(2007)03-0068-04 模拟频域滤波重构直方图均衡的图像增强方法 1,2 1 1 1 1,2 刘焕雨 ，万秋华 ，熊文卓 ，楚广生 ，吴永芝 ( 1. 中国科学院长春光学精密机械与物理研究所，吉林 长春 130033 ； 2. 中国科学院研究生院，北京 100039 ) 摘要：针对传统图像增强方法的不足，提出一种基于模拟频域滤波重构直方图均衡的图像增强方法。将频率域滤 波的思想引入空间域直方图运算当中，在模拟频率直方图统计中进行频率信息的统计，利用这些频率信息建立模 拟频率域坐标，进行模拟频域滤波，对滤波处理后的直方图进行均衡化处理。实验表明：与传统方法相比，该算 法优化了灰度级的动态分布范围，能得到更清晰的增强效果，且在图像中没有视觉明显的噪声放大。 关键词：图像增强；模拟频率直方图统计；模拟频域滤波；重构直方图均衡 中图分类号：TN911.73 文献标识码：A Image enhancing method based on reconstructed histogram equalization after simulated frequency domain filter 1, 2 1 1 1 1, 2 LIU Huan-yu ，WAN Qiu-hua ，XIONG Wen-zhuo ，CHU Guang-sheng ，WU Yong-zhi ( 1. Changchun Institute of Optics, Fine Mechanics and Physics, the Chinese Academy of Sciences, Changchun 130033, China; 2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China ) Abstract ：In view of the faults of traditional image enhancing method, a new method based on reconstructed histogram equalization after simulating frequency domain filter is presented. Frequency domain filter algorithm is applied to spatial domain histogram operation. Frequency information is acquired statistically in simulated frequency histogram statistic first, then simulated frequency domain coordinates are constitu