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2D FFt [message #7300]

Mon, 21 October 1996 00:00

Walid
Messages: 9
Registered: July 1996

Junior Member

Hi,

Does anyone out there know of a routine which takes the 2d FFT of an
image, much like that presented in the IDL demo? I know this can be
done using the 1D FFT routine for each line, but has anyone actually
written a routine to do this, or know of how it was done in the demo?

Also, how does one then apply a filter, as was done in the IDL demo, to
the FFT data (obviously, by multiplying in the frequency domain, and
then inverse FFTing the data, but how does one create the filter
initially?).

I remember when first learning IDL and running the demo, I assumed that
doing this was a simple extension of IDL, but I was surprised to find
that the routines are not built-in.

Thanks for the help,

Walid

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