Can you explain more about what you referred to as the correlation map in the code? The 'corr3D_1' variable?
Is the center element of your correlation map 1? What values do you get when trying other images (especially uint8 images)?
I saw the original post of the code here. I am not familiar with 3D volume correlation, but is 1 the expected value for two identical volumes by this code? Might want to talk to the code provider about the expected values. The code might not have consider normalization.
Also, if 'corr3d_1' is a volume, why did you only use two 'max' to get the max value for normalization?
