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image math

Hi,
I need to work out some image math problems. I have a program in which
I use the fft and inverse fft imaq vi's. Now I tried to test these
vi's for my own gratification to insure they really do what they are
supposed to but I had no luck. Heres what I did.
I loaded an image and showed it in a window then I took it's fft then I
took the inverse fft of the result and finally I showed it in a new
window. But I couldn't seem to get the program to work. I got an error
that claims imaq fft incompatible size [gil]. I tried just about every
combination of sizes possible and nothing seems to work.
Does any one have any ideas?
Jeremy


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