I made a delaunay triangulation with openCv thanks to this code : example code (in partiluclar draw_subdiv). However, when I want to display the triangulation, I get the mesh and lines who don't belong to triangulation.This lines are due to the fact that the triangulation algorithm starts its job considering triangles posted at "infinity".
Can you explain me how to draw only the mesh into the convex hull please (without this lines) ?
display function :
void draw_subdiv(Mat &img, Subdiv2D& subdiv, Scalar delaunay_color) { vector<Vec6f> triangleList; subdiv.getTriangleList(triangleList); vector<Point> pt(3); for(size_t i = 0; i < triangleList.size(); ++i) { Vec6f t = triangleList[i]; pt[0] = Point(cvRound(t[0]), cvRound(t[1])); pt[1] = Point(cvRound(t[2]), cvRound(t[3])); pt[2] = Point(cvRound(t[4]), cvRound(t[5])); line(img, pt[0], pt[1], delaunay_color, 1); line(img, pt[1], pt[2], delaunay_color, 1); line(img, pt[2], pt[0], delaunay_color, 1); } } main function :
Mat image = imread(argv[1], 1); ..... .... //creat delaunay Scalar delaunay_color(255, 255, 255), point_color(0,0,255); Rect rect(0,0,image.cols, image.rows); Subdiv2D subdiv(rect); for(int i = 0; i < point.getDim(); ++i) { Point2f fp(point.getCoord()[i].real(), point.getCoord()[i].imag()); subdiv.insert(fp); } draw_subdiv(image, subdiv, delaunay_color); imwrite("data/delaunay.jpg", image); Result:
