基于Bayes决策的组合中值滤波
COMBINATION MEDIAN FILTER BASED ON BAYES-DECISION
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摘要: 针对图象滤波中的滤噪和细节保护的矛盾,提出了基于Bayes决策的组合中值滤波技术。内容有:(1)导出了测试向量的联合分布密度函数;(2)提出了先验概率的一种估计算法,该算法具有一定的普遍应用意义;(3)基于Bayes决策,将标准中值滤波器(MF)和多级中值滤波器(MLM)组合应用,给出一种效果优良的组合中值滤波器结构。Abstract: To settle the contradiction of noise-filtering and image detail-preserving in image filtering, a combination median filter based on Bayes-decision is proposed. The main contributions are: (1) deriving the union conditional density function of a defined test vector; (2) giving an algorithm for estimating pre-probability; (3) introducing a new filter structure, which combining median and multistage median filters based on Bayes-decision.
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