【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。更多还原

【Abstract】 In the CR systems,the images are blurred and lots of noise appears because of the effect of low- pass filter.And the differ- ence 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 multiresolution properties of wavelet analysis;it can enlarge the scale of gray levels and enhance the detail definition in the image by restraining light phenomenon.更多还原