本代码基于opencv2.2，轮廓检测，输入图像，进行边缘检测并将图像区分为背景和目标，二值化，用轮廓把目标区域显示出来，还可得到目标区域内的面积，即目标的大小-The code is based on opencv2.2, contour detection, the input image, edge detection and image area is divided into the background and objectives, the two values, the targ