CODEWITHSUNDEEP
opencvnan
carlos.baez
carlos.baez

Reputation: 1143

Not-a-Number" NaN with arithmetical operations in OpenCV

I have a doubt with OpenCV. I am doing a division with this library between two vectors ( Mat objects with a 65356x1 size). Both vectors include 0s and the division does this operation for each array element. The problem is when it divides by 0s, operation (0/0 for example), its result is not NaN, is 0!. I think It is wrong... Are there some way to get the correct result (with NaNs) or am I doing something wrong?

The code is very simple:

Mat G = im_g/tableReshaped; //(where img_g and tableReshaped are 65356x1 matrices).

Upvotes: 2

Views: 1214

Answers (1)

vinograd47
vinograd47

Reputation: 6420

This is an expected behavior of cv::devide function. It returns 0 for division by zero:

dst(y, x) = src2(y, x) != 0 ? src1(y, x) / src2(y, x) : 0;

If you want to get NaNs you can write your own loop for division.

Upvotes: 2

Related Questions