全方位鐘形加權(quán)中值濾波器
OMNIDIRECTIONAL BELL-SHAPED WEIGHTED MEDIAN FILTERS
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摘要: 在圖象恢復(fù)處理中,細(xì)節(jié)信號的方向性是隨機(jī)的。采用標(biāo)準(zhǔn)中值濾波器恢復(fù)圖象時,是將中心象素以用毗鄰象素與其它象素在(2N+1)(2N+1)方窗內(nèi)的圖象塊中的作用是不一樣的。針對上述兩個問題,本文提出了全方位鐘形加權(quán)中值濾波器。在理論上,證明了該濾波器的收斂特性,在實驗中將這種濾波器與其它中值濾波器進(jìn)行了性能比較。結(jié)果表明,這種濾波器恢復(fù)圖象的效果較好。
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關(guān)鍵詞:
- 中值濾波器; 圖象恢復(fù); 收斂特性
Abstract: In image restoration, the directions of the details are random. By standard median filter, the central pixel is processed as well as others, but in fact, the central pixel and it s neighbourhoods act as different role from others. To solve the above two problems, omnidirectional bell-shaped weighted median filters are proposed. The filter s convergence properties are proved. For noise standard image the comparison between the filter proposed in this paper and other median filters are made. The results show that the proposed filter performs better than others. -
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