找轮廓
vector<vector<Point>> contours; vector<Vec4i> hierarchy; //只提取最外层的轮廓 findContours(thresh_Img, contours, hierarchy, RETR_EXTERNAL, CV_CHAIN_APPROX_NONE); vector<vector<Point>> contours; vector<Vec4i>找轮廓
vector<vector<Point>> contours; vector<Vec4i> hierarchy; //只提取最外层的轮廓 findContours(thresh_Img, contours, hierarchy, RETR_EXTERNAL, CV_CHAIN_APPROX_NONE); vector<vector<Point>> contours; vector<Vec4i>