Posted by massimo gaspari on June 25, 1998 at 06:56:17:

In Reply to: Cross-correlation by FFT and Gaussian interpolation posted by Alex Liberzon on June 23, 1998 at 09:47:06:

: I'm looking for Fortran/C codes on three subjects:

: 1. Fast Fourier Transform of matrices about 1000 x 1000

: 2. Cross-correlation between two matrices by FFT

: 3. Gaussian interpolation, that will help to search

: maximum value of the cross-correlation.

Do

http://theory.lcs.mit.edu/~fftw/

is a multidimensional fft in C.

Hope this help

Massimo