基于小波变换的反锐化掩模图像增强新算法  

Unsharp Masking Algorithm for Image Enhancement Based on Wavelet Transform

作　　者：刘劲[1] 康志伟[1] 何怡刚[2] 

机构地区：[1]湖南大学计算机与通信学院,长沙410082 [2]湖南大学电气与信息工程学院,长沙410082

出　　处：《计算机工程》2007年第21期179-180,185,共3页Computer Engineering

基　　金：国家自然科学基金资助项目(50677014);湖南省自然科学基金资助项目(06JJ50114)

摘　　要：针对传统的基于小波变换的反锐化掩模图像增强算法中存在的问题,即对比度相同而幅角不同的边缘达到的增强效果之间差别较大,提出了一种新的基于小波变换的反锐化掩模图像增强算法。该算法在对原始图像进行小波分解的基础上,根据小波变换所提供的幅角,对小波系数进行自适应增强处理。实验结果表明,与传统算法相比,新算法使对比度相同而幅角不同的边缘达到的增强效果之间的差别明显减小。In view of the problem of the conventional method for unsharp masking algorithm for image enhancement based on wavelet transform that the enhancement of edges whose contrast is same but angles are different is greatly different, a new method for unsharp masking algorithm for image enhancement based on wavelet transform is proposed. The original image is decomposed into wavelet, is based on angles of wavelet coefficients, wavelet coefficients are self-adaptively processed. The image of enhancement is obtained via the inverse wavelet transform. The experimental result demonstrates that the difference of enhancement of edges whose contrast is same but angles are different in the new method is greatly less than that in the conventional method.

关 键 词：小波变换 反锐化掩模法 增强 对比度 

分 类 号：TP911.72[自动化与计算机技术]