然后采用顶点塌缩算法实现的彩色形态学开闭算子生成了所需的非线性尺度空间；
Morphological opening-closing is implemented using vertex-collapse algorithm. A nonlinear scale space will be constructed efficiently with perfect shape preserving.
本研究主要以山顶点为切入点，分析地形特征点在不同地貌形态中的分布规律。
This study takes the surface peak as a breakthrough, in order to analysis the distributing of the terrain feature points in different topographic forms.
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