De-noising Method based on Median Filter and Wavelet Transform
Weibo Yu, Fangxue Liu, Liming Zheng, Dongmei Wang · 2015
As to the hybrid noise characteristic, a mixed de-noising method is hereby proposed in combination with the median filter and the wavelet transform.Firstly, conduct the median filter to the pending image; then apply an improved threshold function to the wavelet transform (WT) to eliminate noise; finally, adopt Signal Noise Ratio (SNR) to evaluate the image de-noising effect.The experiment results show that de-noising effect of the new algorithm is more excellent than the traditional wavelet transform and can eliminate hybrid noise so that the image quality can be improved effectively.