58 lines
1.3 KiB
C++
58 lines
1.3 KiB
C++
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#include "opencv2/imgproc.hpp"
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#include "opencv2/highgui.hpp"
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#include <iostream>
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using namespace cv;
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using namespace std;
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static void help(char** argv)
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{
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cout << "\nThis sample program demonstrates the use of the convexHull() function\n"
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<< "Call:\n"
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<< argv[0] << endl;
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}
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int main( int argc, char** argv )
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{
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CommandLineParser parser(argc, argv, "{help h||}");
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if (parser.has("help"))
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{
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help(argv);
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return 0;
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}
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Mat img(500, 500, CV_8UC3);
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RNG& rng = theRNG();
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for(;;)
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{
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int i, count = (unsigned)rng%100 + 1;
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vector<Point> points;
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for( i = 0; i < count; i++ )
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{
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Point pt;
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pt.x = rng.uniform(img.cols/4, img.cols*3/4);
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pt.y = rng.uniform(img.rows/4, img.rows*3/4);
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points.push_back(pt);
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}
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vector<Point> hull;
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convexHull(points, hull, true);
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img = Scalar::all(0);
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for( i = 0; i < count; i++ )
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circle(img, points[i], 3, Scalar(0, 0, 255), FILLED, LINE_AA);
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polylines(img, hull, true, Scalar(0, 255, 0), 1, LINE_AA);
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imshow("hull", img);
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char key = (char)waitKey();
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if( key == 27 || key == 'q' || key == 'Q' ) // 'ESC'
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break;
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}
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return 0;
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}
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