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samples/cpp/tutorial_code/snippets/imgproc_drawContours.cpp
39 строк
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Christoph Rackwitz
Merge pull request #23108 from crackwitz:issue-23107
09 янв 2023, 12:55
Не верифицирован
09 янв 2023, 12:55
a64b51d
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#include "opencv2/imgproc.hpp" #include "opencv2/highgui.hpp" using namespace cv; using namespace std; int main( int argc, char** argv ) { Mat src; // the first command-line parameter must be a filename of the binary // (black-n-white) image if( argc != 2 || !(src=imread(argv[1], IMREAD_GRAYSCALE)).data) return -1; Mat dst = Mat::zeros(src.rows, src.cols, CV_8UC3); src = src > 1; namedWindow( "Source", 1 ); imshow( "Source", src ); vector<vector<Point> > contours; vector<Vec4i> hierarchy; findContours( src, contours, hierarchy, RETR_CCOMP, CHAIN_APPROX_SIMPLE ); // iterate through all the top-level contours, // draw each connected component with its own random color int idx = 0; for( ; idx >= 0; idx = hierarchy[idx][0] ) { Scalar color( rand()&255, rand()&255, rand()&255 ); drawContours( dst, contours, idx, color, FILLED, 8, hierarchy ); } namedWindow( "Components", 1 ); imshow( "Components", dst ); waitKey(0); }