基于层叠处理的多级自适应WOS滤波器  

Multi-Stage Adaptive WOS Stack Filter

作　　者：王伟[1] 赵春晖 孙圣和[1] 

机构地区：[1]哈尔滨工业大学自动化测试与控制系,哈尔滨150001

出　　处：《中国图象图形学报（A辑）》2000年第8期670-673,共4页Journal of Image and Graphics

基　　金：国家自然科学基金项目!( 69772 0 44)

摘　　要：基于层叠处理的 L P算法求解最优非线性滤波器的缺陷在于 :(1)必须掌握信号和噪声的先验统计知识 ;(2 )计算量随滤波窗增大呈超指数增加 .根据层叠滤波器理论 ,所有 WOS滤波器正布尔函数都是线性可分离的 .在此基础上 ,提出了一种多级自适应 WOS层叠滤波器 ,从而有效地克服了传统 L P算法的缺点 。Traditional LP algorithm based on stack processing lies in two disadvantages for finding optimal solution of nonlinear filters: (1) Joint statistics of the signal and noise processes must be known; (2) The complexity of the LP increases faster than exponentially as a function of the window size. Base on optimal stack filtering theory, the multi stage adaptive WOS filter is proposed by expressing the PBF of WOS filter in term of linear separate function. Above disadvantages can be overcome by this algorithm, therefore, the class of filter is suitable to image processing.

关 键 词：非线性滤波 加权排序统计 层叠滤波器 信号处理 

分 类 号：TN911.73[电子电信—通信与信息系统] TN713[电子电信—信息与通信工程]