在对信号阈值分解基础上 ,利用结构化方法结合最优估计理论 ,对最优结构元约束层叠滤波器进行建模和分析 ,证明了最优结构元约束层叠滤波器实质是一类由多个极大 /极小滤波单元组成的多级秩排序滤波器 ,并给出基于层叠处理操作和多级秩排序操作的滤波器实现结构 .最后 ,结合图像处理应用实例 ,与其它传统多级秩排序滤波器进行了比较 ,证明了本文滤波器的有效性 Based on the signal threshold decomposition, the structured method and the optimal estimation theory are used to model and analyze the optimal structural element constrained cascaded filters. It is proved that the optimal structural element constrained cascaded filters are essentially composed of multiple Maximum / minimum filter unit, and gives the structure of the filter based on the cascade processing operation and the multilevel rank ordering operation.Finally, combining with the image processing application example, The comparison of filters shows that the proposed filter is effective