WebSVN - OpenCV2-Cookbook - Diff - Rev 3 and 5




        cv::namedWindow("Binary Image");
        cv::imshow("Binary Image",image);

        // Get the contours of the connected components
        std::vector<std::vector<cv::Point> > contours;
        cv::findContours(image,
                contours, // a vector of contours 
                CV_RETR_EXTERNAL, // retrieve the external contours
                CV_CHAIN_APPROX_NONE); // retrieve all pixels of each contours

        // Print contours' length
        std::cout << "Contours: " << contours.size() << std::endl;
        std::vector<std::vector<cv::Point> >::const_iterator itContours= contours.begin();
        for ( ; itContours!=contours.end(); ++itContours) {

                std::cout << "Size: " << itContours->size() << std::endl;
        }


        cv::imshow("Contours",result);

        // Eliminate too short or too long contours
        int cmin= 100;  // minimum contour length
        int cmax= 1000; // maximum contour length
        std::vector<std::vector<cv::Point> >::const_iterator itc= contours.begin();
        while (itc!=contours.end()) {

                if (itc->size() < cmin || itc->size() > cmax)
                        itc= contours.erase(itc);
                else

        cv::namedWindow("All Contours");
        cv::imshow("All Contours",result);

        cv::waitKey();
        return 0;
 
}
 

Subversion Repositories OpenCV2-Cookbook

(root)/trunk/Chapter 07/blobs.cpp - Rev 3 → 5

Rev 3		Rev 5
Line 30...		Line 30...
30		30
31	cv::namedWindow("Binary Image");	31	cv::namedWindow("Binary Image");
32	cv::imshow("Binary Image",image);	32	cv::imshow("Binary Image",image);
33		33
34	// Get the contours of the connected components	34	// Get the contours of the connected components
35	std::vector<std::vector<cv::Point>> contours;	35	std::vector<std::vector<cv::Point> > contours;
36	cv::findContours(image,	36	cv::findContours(image,
37	contours, // a vector of contours	37	contours, // a vector of contours
38	CV_RETR_EXTERNAL, // retrieve the external contours	38	CV_RETR_EXTERNAL, // retrieve the external contours
39	CV_CHAIN_APPROX_NONE); // retrieve all pixels of each contours	39	CV_CHAIN_APPROX_NONE); // retrieve all pixels of each contours
40		40
41	// Print contours' length	41	// Print contours' length
42	std::cout << "Contours: " << contours.size() << std::endl;	42	std::cout << "Contours: " << contours.size() << std::endl;
43	std::vector<std::vector<cv::Point>>::const_iterator itContours= contours.begin();	43	std::vector<std::vector<cv::Point> >::const_iterator itContours= contours.begin();
44	for ( ; itContours!=contours.end(); ++itContours) {	44	for ( ; itContours!=contours.end(); ++itContours) {
45		45
46	std::cout << "Size: " << itContours->size() << std::endl;	46	std::cout << "Size: " << itContours->size() << std::endl;
47	}	47	}
48		48
Line 57...		Line 57...
57	cv::imshow("Contours",result);	57	cv::imshow("Contours",result);
58		58
59	// Eliminate too short or too long contours	59	// Eliminate too short or too long contours
60	int cmin= 100; // minimum contour length	60	int cmin= 100; // minimum contour length
61	int cmax= 1000; // maximum contour length	61	int cmax= 1000; // maximum contour length
62	std::vector<std::vector<cv::Point>>::const_iterator itc= contours.begin();	62	std::vector<std::vector<cv::Point> >::const_iterator itc= contours.begin();
63	while (itc!=contours.end()) {	63	while (itc!=contours.end()) {
64		64
65	if (itc->size() < cmin \|\| itc->size() > cmax)	65	if (itc->size() < cmin \|\| itc->size() > cmax)
66	itc= contours.erase(itc);	66	itc= contours.erase(itc);
67	else	67	else
Line 164...		Line 164...
164	cv::namedWindow("All Contours");	164	cv::namedWindow("All Contours");
165	cv::imshow("All Contours",result);	165	cv::imshow("All Contours",result);
166		166
167	cv::waitKey();	167	cv::waitKey();
168	return 0;	168	return 0;
169	}	-
170		169	}
-		170