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/* This sample code was originally provided by Liu Liu |
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* Copyright<EFBFBD> 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_c.h" |
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void help() |
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{ |
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printf("\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 CvScalar colors[] = |
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{ |
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{{0,0,255}}, |
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{{0,128,255}}, |
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{{0,255,255}}, |
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{{0,255,0}}, |
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{{255,128,0}}, |
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{{255,255,0}}, |
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{{255,0,0}}, |
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{{255,0,255}}, |
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{{255,255,255}}, |
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{{196,255,255}}, |
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{{255,255,196}} |
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}; |
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static uchar bcolors[][3] = |
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{ |
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{0,0,255}, |
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{0,128,255}, |
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{0,255,255}, |
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{0,255,0}, |
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{255,128,0}, |
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{255,255,0}, |
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{255,0,0}, |
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{255,0,255}, |
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{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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char path[1024]; |
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IplImage* img; |
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help(); |
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if (argc!=2) |
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{ |
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strcpy(path,"puzzle.png"); |
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img = cvLoadImage( path, CV_LOAD_IMAGE_GRAYSCALE ); |
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if (!img) |
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{ |
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printf("\nUsage: mser_sample <path_to_image>\n"); |
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return 0; |
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} |
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} |
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else |
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{ |
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strcpy(path,argv[1]); |
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img = cvLoadImage( path, CV_LOAD_IMAGE_GRAYSCALE ); |
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} |
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if (!img) |
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{ |
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printf("Unable to load image %s\n",path); |
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return 0; |
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} |
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IplImage* rsp = cvLoadImage( path, CV_LOAD_IMAGE_COLOR ); |
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IplImage* ellipses = cvCloneImage(rsp); |
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cvCvtColor(img,ellipses,CV_GRAY2BGR); |
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CvSeq* contours; |
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CvMemStorage* storage= cvCreateMemStorage(); |
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IplImage* hsv = cvCreateImage( cvGetSize( rsp ), IPL_DEPTH_8U, 3 ); |
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cvCvtColor( rsp, hsv, CV_BGR2YCrCb ); |
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CvMSERParams params = cvMSERParams();//cvMSERParams( 5, 60, cvRound(.2*img->width*img->height), .25, .2 ); |
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double t = (double)cvGetTickCount(); |
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cvExtractMSER( hsv, NULL, &contours, storage, params ); |
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t = cvGetTickCount() - t; |
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printf( "MSER extracted %d contours in %g ms.\n", contours->total, t/((double)cvGetTickFrequency()*1000.) ); |
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uchar* rsptr = (uchar*)rsp->imageData; |
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// draw mser with different color |
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for ( int i = contours->total-1; i >= 0; i-- ) |
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{ |
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CvSeq* r = *(CvSeq**)cvGetSeqElem( contours, i ); |
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for ( int j = 0; j < r->total; j++ ) |
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{ |
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CvPoint* pt = CV_GET_SEQ_ELEM( CvPoint, r, j ); |
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rsptr[pt->x*3+pt->y*rsp->widthStep] = bcolors[i%9][2]; |
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rsptr[pt->x*3+1+pt->y*rsp->widthStep] = bcolors[i%9][1]; |
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rsptr[pt->x*3+2+pt->y*rsp->widthStep] = bcolors[i%9][0]; |
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} |
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} |
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// find ellipse ( it seems cvfitellipse2 have error or sth? |
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for ( int i = 0; i < contours->total; i++ ) |
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{ |
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CvContour* r = *(CvContour**)cvGetSeqElem( contours, i ); |
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CvBox2D box = cvFitEllipse2( r ); |
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box.angle=(float)CV_PI/2-box.angle; |
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if ( r->color > 0 ) |
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cvEllipseBox( ellipses, box, colors[9], 2 ); |
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else |
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cvEllipseBox( ellipses, box, colors[2], 2 ); |
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} |
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cvSaveImage( "rsp.png", rsp ); |
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cvNamedWindow( "original", 0 ); |
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cvShowImage( "original", img ); |
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cvNamedWindow( "response", 0 ); |
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cvShowImage( "response", rsp ); |
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cvNamedWindow( "ellipses", 0 ); |
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cvShowImage( "ellipses", ellipses ); |
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cvWaitKey(0); |
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cvDestroyWindow( "original" ); |
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cvDestroyWindow( "response" ); |
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cvDestroyWindow( "ellipses" ); |
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cvReleaseImage(&rsp); |
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cvReleaseImage(&img); |
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cvReleaseImage(&ellipses); |
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}
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