A new directional weighted median filter for removal of random-valued impulse noise

被引:307
作者
Dong, Yiqiu [1 ]
Xu, Shufang [1 ]
机构
[1] Peking Univ, Sch Math Sci, Beijing 100871, Peoples R China
基金
中国国家自然科学基金;
关键词
image denoising; impulse detector; random-valued impulse noise;
D O I
10.1109/LSP.2006.884014
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The known median-based denoising methods tend to work well for restoring the images corrupted by random-valued impulse noise with low noise level but poorly for highly corrupted images. This letter proposes a new impulse detector, which is based on the differences between the current pixel and its neighbors aligned with four main directions. Then, we combine it with the weighted median filter to get a new directional weighted median (DWM) filter. Extensive simulations show that the proposed filter not only can provide better performance of suppressing impulse with high noise level but can preserve more detail features, even thin lines. As extended to restoring corrupted color images, this filter also performs very well.
引用
收藏
页码:193 / 196
页数:4
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