Hello Franz: I have contacted and left messages with the authors of the article that I saw the formula in but your argument makes sense. I am familiar with the FFT and correlation process and in fact we use the hanning window to reduce the artifacts of the discrete fourier transform just as you say.
Thanks a lot for your help. I will post the final answer when they get back to me. I am glad I had someone else take a look at this. Now the next step i have to figure out is how to do this in 2d, that is in the spacial image domain. I want to work and calculate the formulation of the nonsymmetry coefficient in the 2d domain. I am going to start with the FFT of the image and the complex conjugate of the FFT of the image to get corrrelation function. At this point, I am a little confused on how to use numeric integration in labview in the 2d domain so need to study that some more. Sincerely, Don
