中文名<边沿检测与提取，轮廓跟踪> 介绍的是一种图象的处理方法-Chinese name

使用opencv提取单据轮廓,判断轮廓的角度,根据需要旋转扶正,再次提取并保存成图片-Using opencv extract documents outline, judge contour point of view, according to the need to rotate the centralizer, extract and save into the picture again