vector<Vec4i> hierarchy; //findContours(binary, contours, hierarchy,RETR_EXTERNAL, CHAIN_APPROX_SIMPLE, Point()); //findContours(binary, contours, hierarchy, RETR_TREE, CHAIN_APPROX_SIMPLE, Point()); findContours(binary, contours, hierarchy, RETR_LIST, CHAIN_APPROX_NONE, Point()); //findConto...
函数cvFindContours()从二值图像中寻找轮廓.cvFindContours()处理的图像可以是从cvCanny()函数得到的有边缘像素的图像,或者是从cvThreshold()及cvAdaptiveThreshold()得到的图像,这时的边缘是正和负区域之间的边界. 图8-2描述了cvFindContours的函数功能,图像的上半部分是神色背景和白色区域(被从A到E标记)的测试图像.下...
int getBlobs(Mat binary, vector<vector<Point>> & blobs) { Mat labels(src.size(), CV_32S); vector<vector<Point>> contours; vector<Vec4i> hierarchy; findContours(binary, contours, hierarchy, CV_RETR_CCOMP, CV_CHAIN_APPROX_NONE); blobs.clear(); blobs.reserve(contours.size()); int coun...
void cv::findContours ( InputOutputArray image, OutputArrayOfArrays contours, OutputArray hierarchy, int mode, int method, Point offset = Point() ) 函数参数: image 输入:源图像,一个8位单通道图像,注意一定是CV_8UC1的单通道图像,否则报错。非零像素被视为1。零像素保持为0,因此图像被视为二进制。
cvtColor(image,image,CV_BGR2GRAY); vector<vector<Point>> contours; // find findContours(image,contours,CV_RETR_EXTERNAL,CV_CHAIN_APPROX_NONE); // draw Mat result(image.size(),CV_8U,Scalar(0)); drawContours(result,contours,-1,Scalar(255),2); ...
OpenCV的“findContours”功能经常被计算机视觉工程师用来检测物体。OpenCV的存在,使得我们只需要编写几行代码就可以检测轮廓(对象)。然而,OpenCV检测到的轮廓通常是分散的。例如,一个功能丰富的图像可能有数百到数千个轮廓,但这并不意味着图像中有那么多对象。一些属于同一对象的轮廓是单独检测的,因此我们感兴趣的是对...
error LNK2001: unresolved external symbol _cvDrawContours error LNK2001: unresolved external symbol _cvReleaseMemStorage error LNK2001: unresolved external symbol _cvDestroyWindow error LNK2001: unresolved external symbol _cvFindContours error LNK2001: unresolved external symbol _cvCvtColor ...
findContours(image,contours,hierarchy,RETR_TREE,CHAIN_APPROX_SIMPLE,Point()); 查找轮廓的参数导致的结果,参考:https://blog.csdn.net/dcrmg/article/details/51987348 13. mat 的创建,复制和释放,构造函数等等 参考:https://blog.csdn.net/wanggao_1990/article/details/53150926 ...
【解决】error: (-215:Assertion failed) npoints >= 0 && (depth == CV_32F || depth == CV_32S) in function ‘cv::contourArea’ 原代码 cnts=cv2.findContours(edged.copy(),cv2.RETR_LIST,cv2.CHAIN_APPROX_SIMPLE)[1] 因为新版cv2.findContours返回两个值,[0]号结果为轮廓 ...
Cv2.FindContours(opening, out contours, out HierarchyIndex[] outputArray, RetrievalModes.List, ContourApproximationModes.ApproxSimple);Mat DST = new Mat(new OpenCvSharp.Size(rawMat.Cols, rawMat.Rows), MatType.CV_8UC3, Scalar.White);for (int i = 0; i < contours.Length; i++){ double ...