1 #include "opencv2/highgui/highgui.hpp"
2 #include "opencv2/imgproc/imgproc_c.h"
4 int main(int argc, char** argv)
6 const char* filename = argc >= 2 ? argv[1] : "pic1.png";
7 IplImage* src = cvLoadImage( filename, 0 );
10 CvMemStorage* storage = cvCreateMemStorage(0);
17 dst = cvCreateImage( cvGetSize(src), 8, 1 );
18 color_dst = cvCreateImage( cvGetSize(src), 8, 3 );
20 cvCanny( src, dst, 50, 200, 3 );
21 cvCvtColor( dst, color_dst, CV_GRAY2BGR );
23 lines = cvHoughLines2( dst, storage, CV_HOUGH_STANDARD, 1, CV_PI/180, 100, 0, 0 );
25 for( i = 0; i < MIN(lines->total,100); i++ )
27 float* line = (float*)cvGetSeqElem(lines,i);
29 float theta = line[1];
31 double a = cos(theta), b = sin(theta);
32 double x0 = a*rho, y0 = b*rho;
33 pt1.x = cvRound(x0 + 1000*(-b));
34 pt1.y = cvRound(y0 + 1000*(a));
35 pt2.x = cvRound(x0 - 1000*(-b));
36 pt2.y = cvRound(y0 - 1000*(a));
37 cvLine( color_dst, pt1, pt2, CV_RGB(255,0,0), 3, CV_AA, 0 );
40 lines = cvHoughLines2( dst, storage, CV_HOUGH_PROBABILISTIC, 1, CV_PI/180, 50, 50, 10 );
41 for( i = 0; i < lines->total; i++ )
43 CvPoint* line = (CvPoint*)cvGetSeqElem(lines,i);
44 cvLine( color_dst, line[0], line[1], CV_RGB(255,0,0), 3, CV_AA, 0 );
47 cvNamedWindow( "Source", 1 );
48 cvShowImage( "Source", src );
50 cvNamedWindow( "Hough", 1 );
51 cvShowImage( "Hough", color_dst );