Dear all,
Using the Multitracker algorithm, I would like to know how can I show the ROIs selected in various windows ? I mean show a new window for each ROI selected.
Thanks for your help and support.
Regards,` while(true) { cap >> frame;
for(unsigned i=0;i<trackers.getObjects().size();i++)
{
rectangle(frame, trackers.getObjects()[i], Scalar::all(255), 2);
}
imshow("tracker",frame);
waitKey(30);
} `
you need to clone() the image (so you can draw things independantly), and call imshow() with different window names, like:
for(unsigned i=0; i<trackers.getObjects().size(); i++)
{
Mat img = frame.clone();
rectangle(img, trackers.getObjects()[i], Scalar::all(255), 2);
imshow(format("tracker_%d", i), img);
}
waitKey(30);
if you're mainly interested in the content of the roi's you also could try like this:
Size sz(100,100);
Mat rois;
vector<Rect2d> rects = trackers.getObjects();
for(unsigned i=0; i<rects.size(); i++)
{
Mat patch;
resize(frame(rects[i]), patch, sz);
if (rois.empty())
rois = patch.clone();
else
hconcat(rois, patch, rois);
}
imshow("ROIS", rois);
waitKey(30);
Hello Berak,
One more time thank you. The problem is not to show various windows for each ROI, the problem is how to show window with only the selected ROI. For example, I select various "target" to track, using the MultiTracker algorithm. I need to show various windows which include only the ROIs selected by mouse. If I have three ROI with various size (Width and Height), I want to plot them on separated windows with the same ROI size.
Is it possible to achieve that ?
Thanks for your help and support
Regards,
Asked: 2018-12-07 05:51:32 -0600
Seen: 852 times
Last updated: Dec 11 '18
