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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。
Aiming at the contradiction between filtering and detail protection in image filtering, a combined median filtering technique based on Bayesian decision is proposed. The contents are as follows: (1) The joint distribution density function of the test vector is derived; (2) An estimation algorithm of prior probability is proposed, which has some general application significance; (3) Based on Bayesian decision, The filter (MF) and multi-stage median filter (MLM) are used in combination to give an effective combined median filter structure.