Concatenating vector Rect in opencv

Question

I have two rectangle vectors

std::vector<cv::Rect>faces;
std::vector<cv::Rect>windows;

I need to concatenate windows with faces...for that I wrote the code as

 int fsize=faces.size();
    for(int i=0;i<windows.size();i++)
    {
        faces[fsize]=windows[i];
        fsize++;
    }

But I thk this code is creating segmentation faults...anybody know anything betr..or any built in functions??

score 3 · Answer 1 · answered Feb 18 '13 at 02:47

3

Use insert:

faces.insert(faces.end(), windows.begin(), windows.end());

or to move the contents:

faces.insert(faces.end(), std::make_move_iterator(windows.begin()), 
                          std::make_move_iterator(windows.end()));

answered Feb 18 '13 at 02:47

Jesse Good

score 2 · Accepted Answer · answered Feb 18 '13 at 02:48

You are replacing faces with windows and if windows have more elements than faces you access out of boundary of faces.

If you really mean Concatenating instead of replacing:

faces.reserve(faces.size() + windows.size());
faces.insert(faces.end(), windows.begin(), windows.end());

2 Answers2