OpenCV function similar to matlab's “find”

Question

I am looking for a function in openCV to help me make masks of images.

for example in MATLAB:

B(A<1)=0;

or

B=zeros(size(A));

B(A==

Answer 1

OpenCV C++ supports the following syntax you might find convenient in creating masks:

Mat B= A > 1;//B(A<1)=0

or

Mat B = A==10;
B *= c;

which should be equivalent to:

B=zeros(size(A));
B(A==10)=c;

You can also use compare(). See the following OpenCV Documentation.