From multiscale edges detection, the conclusion is drawn that in certain scale, circular defect is considered as crest edge in two directions, and bar defect in one direction.
从多尺度边缘检测的角度分析得出：在一定尺度下，圆形缺陷在两个方向上都看作是屋脊边缘，而条形缺陷只在一个方向上被看作是屋脊边缘。
From multiscale edges detection, the conclusion is drawn that in certain scale, circular defect is considered as crest edge in two directions, and bar defect in one direction.
由多尺度边缘检测理论可知：在适当尺度下，圆形缺陷在相互正交的两个方向上都是屋脊边缘，而条形缺陷只在一个方向上是屋脊边缘。
While taking into consideration the direction of the lighting source, the craters are detected through edge detection, edge clustering of the same crater and ellipse fitting.
结合光照方向，通过陨石坑边缘的检测、边缘配对以及形状参数拟合等处理实现陨石坑的提取。
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