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图象椒盐噪声的非线性自适应滤除

DOI: 10.11834/jig.20001204

Keywords: 滤波器,椒盐噪声,图象恢复,非线性,自适应

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Abstract:

为了在滤除图象椒盐噪声的同时能很好地保持图象的细节,提出了一种新颖的图象椒盐噪声非线性自适应滤除算法.该方法首先在噪声图象的滤波窗口中去除具有最大和最小灰度值的象素,然后求取剩余象素的均值,计算出该均值与对应的象素灰度值的差值,再通过与阈值相比较,确定是否用求得的均值代替原噪声图象的灰度值.阈值由图象的灰度分布自适应地确定.该算法与已发表的同类算法相比,具有更好的滤波性能,尤其在噪声严重时,其效果明显优于传统的中值滤波算法.

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