Question

Is there a way of finding whether the elements of two cv::Mat matrices are within an acceptable tolerance of each other?

i.e. if A = [a, b, c, d, e, f], and B = [a ± 5%, b ± 5%, c ± 5%, d ± 5%, e ± 5%, f ± 5%]

I’m thinking that the compare() function might be useful, but I’m not really sure how I would implement it.

Answer 1

I used this, to the desired effect:

cv::Mat Upperbound, Lowerbound;
cv::Mat Baseplus;
cv::Mat Baseminus;

Baseplus = 1.1*Base.clone();
Baseminus = 0.9*Base.clone();

        compare(NewData, Baseminus, Lowerbound, CMP_GE);
        compare(NewData, Baseplus, Upperbound, CMP_LE);

        if (countNonZero(Lowerbound)>0) 
        {
            if (countNonZero(Upperbound)>0) 
            {
                if ((countNonZero(Upperbound)+countNonZero(Lowerbound))>4) 
                {
                    cout<<"Eye contact occurs in this frame"<<endl;
                }
            }
        }