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87 lines
2.2 KiB
C++
87 lines
2.2 KiB
C++
/* This sample code was originally provided by Liu Liu
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* Copyright (C) 2009, Liu Liu All rights reserved.
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*/
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#include "opencv2/highgui/highgui.hpp"
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#include "opencv2/features2d/features2d.hpp"
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#include "opencv2/imgproc/imgproc.hpp"
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#include <iostream>
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#include <stdio.h>
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using namespace cv;
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using namespace std;
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void help()
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{
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cout << "\nThis program demonstrates the Maximal Extremal Region interest point detector.\n"
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"It finds the most stable (in size) dark and white regions as a threshold is increased.\n"
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"\nCall:\n"
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"./mser_sample <path_and_image_filename, Default is 'puzzle.png'>\n\n";
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}
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static const Vec3b bcolors[] =
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{
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Vec3b(0,0,255),
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Vec3b(0,128,255),
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Vec3b(0,255,255),
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Vec3b(0,255,0),
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Vec3b(255,128,0),
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Vec3b(255,255,0),
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Vec3b(255,0,0),
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Vec3b(255,0,255),
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Vec3b(255,255,255)
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};
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int main( int argc, char** argv )
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{
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string path;
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Mat img0, img, yuv, gray, ellipses;
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help();
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img0 = imread( argc != 2 ? "puzzle.png" : argv[1], 1 );
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if( img0.empty() )
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{
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if( argc != 2 )
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cout << "\nUsage: mser_sample <path_to_image>\n";
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else
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cout << "Unable to load image " << argv[1] << endl;
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return 0;
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}
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cvtColor(img0, yuv, COLOR_BGR2YCrCb);
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cvtColor(img0, gray, COLOR_BGR2GRAY);
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cvtColor(gray, img, COLOR_GRAY2BGR);
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img.copyTo(ellipses);
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vector<vector<Point> > contours;
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double t = (double)getTickCount();
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MSER()(yuv, contours);
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t = (double)getTickCount() - t;
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printf( "MSER extracted %d contours in %g ms.\n", (int)contours.size(),
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t*1000./getTickFrequency() );
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// draw mser's with different colors
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for( int i = (int)contours.size()-1; i >= 0; i-- )
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{
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const vector<Point>& r = contours[i];
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for ( int j = 0; j < (int)r.size(); j++ )
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{
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Point pt = r[j];
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img.at<Vec3b>(pt) = bcolors[i%9];
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}
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// find ellipse (it seems cvfitellipse2 have error or sth?)
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RotatedRect box = fitEllipse( r );
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box.angle=(float)CV_PI/2-box.angle;
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ellipse( ellipses, box, Scalar(196,255,255), 2 );
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}
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imshow( "original", img0 );
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imshow( "response", img );
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imshow( "ellipses", ellipses );
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waitKey(0);
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}
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