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基于小波变换的CR图像增强 被引量:2

A New CR Image Enhancement Method With Wavelet Transform
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摘要 在数字X光机(CR)成像系统中,由于低通滤波的作用,图像会呈现出较大的模糊及噪声,并且由于人体组织的厚度不同,会引起光晕现象而使图像出现过亮或过暗部分。针对传统CR图像增强方法的不足,本文提出了一种基于小波变换的图像增强新方法,能够提升图像的灰阶层次、有效抑制光晕及噪声,提高细节清晰度。 In the CR systems,the images are blurred and lots of noise appears because of the effect of low-pass filter.And the difference of human body's thickness always brings light phenomenon in the image,very light or very dark.This paper introduces a new image enhancement algorithm based on the muhiresolution properties of wavelet analysis;it can enlarge the scale of gray levels and enhance the detail definition in the image by restraining light phenomenon.
出处 《微计算机信息》 北大核心 2007年第36期293-294,299,共3页 Control & Automation
基金 上海市教委自然科学项目基金(05EZ37)
关键词 小波 去噪 非线性函数 反锐化掩模 wavelet,denoise,nonlinear funtion, unsharp masking
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