小波域中值滤波的图像去噪方法  

A Method of Image De-Noising Based on Wavelet Domain Median Filter

作　　者：倪虹霞[1] 胡巧多[2] 

机构地区：[1]长春工程学院信息工程系,吉林长春130021 [2]上海商学院计算机与电子工程学院,上海200253

出　　处：《大连铁道学院学报》2006年第4期35-38,共4页Journal of Dalian Railway Institute

摘　　要：提出了小波域中值滤波的去噪方法,在去除高斯白噪声的同时能有效地去除脉冲噪声.此方法是在小波域内对高频子带进行中值滤波,然后选择相应的门限进行降噪处理.仿真实验表明该算法不仅能滤除图像中的脉冲噪声和高斯噪声,而且能较好的保留图像的边缘细节,其滤波效果优于小波软阀值去噪.A new de-noising method based on wavelet domain median filter is proposes, which is effective for removing Gaussian white and impulse noises. Firstly, the median filtering is carried out in the wavelet domain to high frequency sub-band, and then the de-noising processing is implemented via selecting the corresponding threshold. Experiments are performed to illustrate that the method can better remove impulse and gauss white noises while sustaining the details of the image,which proves that a better result is obtained than that of the soft - thresholding method based on wavelet transform.

关 键 词：小波变换 中值滤波 小波域中值滤波器 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]