Access Image pixels' value OpenCV, C++

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Hello all,

I am trying to access color image pixels' values an somehow process them. Here is what I am trying to do:

1. I have two color images I1 & I2 (same size images).
2. I would like to compare all their pixels: compare I1(i,j) with I2(i,j).
3. if I1(i,j) > I2(i,j) , copy I1(i,j) to a new image I3(i,j)
4. else copy I2(i,j) to I3(i,j)
5. at the end return the color image I3

I am using opencv3.1 and visual studio 2015.

Thanks in advance.