Question

I’ve got a histogram in a MatND and I want to retrieve its max and min values. In the C version of OpenCV there is a function cvGetMinMaxHistValue() which does this very job, but it doesn’t accept a MatND. What alternative do I have?

Answer 1

Looping through the histogram is pretty easy:

cv::MatND hist;

[... get histogram ...]

for (int i=0; i<256; i++)
{
    float hist_value = hist.at<float>(i);
    // do stuff
}

Hope it helps 🙂