[GRASS-dev] Re: [GRASS-SVN] r34353 - in grass/trunk/imagery: i.fft i.ifft

[Markus Neteler]

On Tue, Nov 18, 2008 at 2:41 AM,  <svn_grass at osgeo.org> wrote:
> Author: glynn
> Date: 2008-11-17 20:41:17 -0500 (Mon, 17 Nov 2008)
> New Revision: 34353
>
> Removed:
>   grass/trunk/imagery/i.fft/fft_colors.c
>   grass/trunk/imagery/i.fft/globals.h
>   grass/trunk/imagery/i.fft/local_proto.h
>   grass/trunk/imagery/i.fft/orig_wind.c
>   grass/trunk/imagery/i.fft/save_fft.c
>   grass/trunk/imagery/i.ifft/globals.h
>   grass/trunk/imagery/i.ifft/local_proto.h
>   grass/trunk/imagery/i.ifft/orig_wind.c
> Modified:
>   grass/trunk/imagery/i.fft/Makefile
>   grass/trunk/imagery/i.fft/i.fft.html
>   grass/trunk/imagery/i.fft/main.c
>   grass/trunk/imagery/i.ifft/Makefile
>   grass/trunk/imagery/i.ifft/i.ifft.html
>   grass/trunk/imagery/i.ifft/main.c
> Log:
> Rewrite i.fft, i.ifft
> Output maps are FP
> Don't use cell_misc/<map>/fft{real,imag} files, use the output maps
> Don't rescale to powers of two (not needed with FFTW)
> Use fft2() with FFTW-style interleaved array, not fft() with separate real/imaginary arrays
> Miscellaneous clean-up

backport this?

Markus