这是使用opencv的方法找图像轮廓的,其实opencv自带的找图像轮廓的函数-This is the use of opencv method for image contour, actually the opencv own for image contour function

最棒的三大计算机视觉,图像图形函数库之一,C语言版本,支持标准C-Best of three computer vision, image libraries of graphics functions, one of the C language version, support the standard C