Dear All:

I am trying to make FFTs of images of assemblies of

spheres and other shapes to explain diffraction, the 

usual thing. So far I do this through cumbersome 

cludges, and I bet there are better ways, and I 

am looking for free or cheap software to do this.

I load the image into basic mathcad, dump it as a grayscale 

array, SFT it with a F90 kludge (s=slow), and load the 

transform back into MC and convert it into an image. However, what

I also want to do is generate a false color diffraction

pattern where the color is the phase. I believe this

is quite similar to the Fourier duck transforms Kevin Cowtan

made. I also recall a textbook were two crystallographers

were phase exchanged, so there got to be packages

that to what I want. 

The mathcad image processing module is too expensive for my taste.

Any suggestions for software - maybe there is some software

out already to simulate diffraction from one, 2, 3 an array of

objects?

Cheers, br

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Bernhard Rupp

www.ruppweb.org              

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