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可以用什么方法,算法,或者函数呢?
什么叫做 阈值小的区域?
@kidswong999 比如检测一个工件表面的划痕,划痕的阈值比较小,怎么把划痕区域区分这样子
http://book.openmv.cc/example/04-Image-Filters/edge-detection.html