ATLAB实现如下：Iimreadxia
bmpsubplot221imshowItitle原始图像axis5025050200axiso
I1im2bwIsubplot222imshowI1title二值图像axis5025050200axiso
I2bwmorphI1skel1subplot223imshowI2title1次骨架提取axis5025050200axiso
I3bwmorphI1skel2subplot224imshowI3title2次骨架提取axis5025050200axiso
21直接提取四个顶点坐标Iimreadxia
bmpII1BWim2bwIfigureimshowBWxygetpts
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