摘要
小波阈值去噪方法被广泛地用在信号去噪中,但它主要是针对白噪声或者宽带噪声,对于脉冲噪声就得不到降噪的效果。该文提出了小波域的中值滤波器去噪方法,在Lee的局部滤波器基础上设计了小波域的中值滤波器,它能在有效去除白噪声的同时较好地去除脉冲噪声。
Thresholding methods were widely used to signal denoising. This method is nearly optimal in many signal space. But this method only suit to white noise or wideband noise and invalid to impulse noise. Based on Lee local filter, wavelet domain median filter is introduced. Typical signals were processed by the new filter and mixed noise was removed effectively.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2003年第1期18-21,共4页
Journal of University of Electronic Science and Technology of China
基金
天津市自然科学基金资助项目
编号:023601611
关键词
小波变换
阈值去噪
中值滤波器
仿真
白噪声
脉冲噪声
wavelet transforms
threshold denoising
median filter
wavelet domain median filter
