全方位钟形加权中值滤波器
OMNIDIRECTIONAL BELL-SHAPED WEIGHTED MEDIAN FILTERS
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摘要: 在图象恢复处理中,细节信号的方向性是随机的。采用标准中值滤波器恢复图象时,是将中心象素以用毗邻象素与其它象素在(2N+1)(2N+1)方窗内的图象块中的作用是不一样的。针对上述两个问題,本文提出了全方位钟形加权中值滤波器。在理论上,证明了该滤波器的收敛特性,在实验中将这种滤波器与其它中值滤波器进行了性能比较。结果表明,这种滤波器恢复图象的效果较好。
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关键词:
- 中值滤波器; 图象恢复; 收敛特性
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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