Hi Michael: Thanks for looking at this for me. The other issue is that when I use the IMAQ VISION cross-correlation fx (which allows me to do direct image correlations without having to do the fft steps), I get different answers than what I get with my LabVIEW routines. I believe that most of this just has to do with scaling but because I cannot see the 'c' code of any of the routines, I am not sure. I tend now to trust the IMAQ VISION routine more because when i correlate two identical U8-format images, I get a cross-correlation maximum of 256 (which I expect to be the maximum possible value for a U8 type image). Then when I correlate two non-identical images, or use subset images, I always get less than this for the maximum. My goal was to implement this procedure without IMAQ Vision since that is the only place I would need Vision for this code. I would appreciate it if you might be able to have one of your math gurus right at NI take a look at this. Any chance of this?
thanks, Don
