Hi,
i'm developing on win 64bit, windows 7. OpenCV Version: opencv 2.4.3 C:\fakepath\contour.png
My contour points after running findContours function, the some vector points in the contours have a 'unable to read memory error'.
The code below is a sample code obtained from opencv samples.
Please help?
Mat src; Mat src_gray; int thresh = 100; int max_thresh = 255; RNG rng(12345);
/// Function header void thresh_callback(int, void* );
int _tmain(int argc, _TCHAR* argv[]) {
/// Load source image and convert it to gray
src = imread( "D://Download - Software//1//1.2.840.113619.2.135.2025.1616282.5237.1221046207.476.jpg", 1 );
/// Convert image to gray and blur it cvtColor( src, src_gray, CV_BGR2GRAY ); blur( src_gray, src_gray, Size(3,3) );
/// Create Window char* source_window = "Source"; namedWindow( source_window, CV_WINDOW_AUTOSIZE ); imshow( source_window, src );
createTrackbar( " Threshold:", "Source", &thresh, max_thresh, thresh_callback ); thresh_callback( 0, 0 );
waitKey(0); return(0); }
/* @function thresh_callback */ void thresh_callback(int, void ) { Mat src_copy = src.clone(); Mat threshold_output; vector<vector<point> > contours; vector<vec4i> hierarchy;
/// Detect edges using Threshold threshold( src_gray, threshold_output, thresh, 255, THRESH_BINARY );
/// Find contours findContours( threshold_output, contours, hierarchy, CV_RETR_TREE, CV_CHAIN_APPROX_SIMPLE, Point(0, 0) );
/// Find the convex hull object for each contour vector<vector<point> >hull(contours.size() ); for( int i = 0; i < contours.size(); i++ ) { convexHull( Mat(contours[i]), hull[i], false ); }
/// Draw contours + hull results Mat drawing = Mat::zeros( threshold_output.size(), CV_8UC3 ); for( int i = 0; i< contours.size(); i++ ) { Scalar color = Scalar( rng.uniform(0, 255), rng.uniform(0,255), rng.uniform(0,255) ); drawContours( drawing, contours, i, color, 1, 8, vector<vec4i>(), 0, Point() ); drawContours( drawing, hull, i, color, 1, 8, vector<vec4i>(), 0, Point() ); }
/// Show in a window namedWindow( "Hull demo", CV_WINDOW_AUTOSIZE ); imshow( "Hull demo", drawing ); }
