A class of optimal 2 D stack filters based on omnidirectional structural elements constraints are proposed by defining omnidirectional structural elements in optimal stack filter design.
在最优层叠滤波器设计中引入全方位结构元，定义了一类全方位结构元约束下的最优二维层叠滤波器。
参考来源 - 最优全方位结构元约束二维层叠滤波器 in C·2,447,543篇论文数据，部分数据来源于NoteExpress
Therefore, stack filter research has important theoretical value and practical significance.
因此， 层叠滤波器的研究具有重要的理论价值和实际意义。
First, nonlinear stack filter is applied to estimate the maximum and minimum of noise-free image's gray scale value in a local region.
首先非线性堆滤波器用于求出图象某象素点邻域内的灰度最大值与最小值的最优估计，然后以此两估计值之差代替原象素点灰度值。
In this paper, a direct edge detection method which combines filtering and detecting is introduced. The edge detection is based on adaptive stack filter.
本文介绍了一种边界直接检测法，即将边界检测与噪声滤波相结合，它是基于自适应堆滤波的边界检测法。
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