I am tryng to detect traffic signs by their colour and shape, i have the binary image from de colour segmentation and i try to detect triangles in it, by unless all the sides of the triangle are complete y doesnt work,
in this image for example it does not detect any triangle
the code i am using is this:
vector<Point> approx;
findContours(copia,contours,CV_RETR_EXTERNAL,CV_CHAIN_APPROX_SIMPLE);
vector<Rect_ <int> > boundRect( contours.size() );
vector<Rect_ <int> > boundRect_( contours.size() );
for(size_t i=0; i<contours.size();i++)
{
approxPolyDP(Mat(contours[i]), approx,arcLength(Mat(contours[i]), true)*0.02, true);
if (approx.size() == 3 &&fabs(contourArea(Mat(approx))) > 300 && isContourConvex(Mat(approx)))
drawContours(capture->image,contours,i,Scalar(0,255,0));
It is not a problem of the cotourArea, i have no problem detecting complete triangles. I do not know if i could do something to detect that kind of "not complete triangles" or i would have to do something to complete the triangle so that i could detect them. In either case i am a bit lost
Thank you for your help
