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Tasklist

FS#18794 - [imagemagick] Fast Fourier Transform doesn't work

Attached to Project: Arch Linux
Opened by Matteo Sasso (m.sasso) - Monday, 22 March 2010, 21:40 GMT
Last edited by Eric Belanger (Snowman) - Tuesday, 06 April 2010, 15:55 GMT
Task Type Bug Report
Category Packages: Extra
Status Closed
Assigned To Eric Belanger (Snowman)
Architecture x86_64
Severity Low
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 1
Private No

Details

I'd like to compute the FFT of an image.
When I do:
convert img.jpg -fft fft.png

I get:
convert: delegate library support not built-in `img.jpg' (FFTW) @ warning/fourier.c/ForwardFourierTransformImage/611.

I have fftw installed.

I looked at ImageMagick's documentation
(http://www.imagemagick.org/script/advanced-unix-installation.php#configure)
and there doesn't seem to be an option to enable this functionality, but the error message seems to suggest that.
This task depends upon

Closed by  Eric Belanger (Snowman)
Tuesday, 06 April 2010, 15:55 GMT
Reason for closing:  Won't implement
Comment by Eric Belanger (Snowman) - Monday, 29 March 2010, 21:45 GMT
fft support needs to be compiled in with the --with-fftw configure option. I'm not sure if I want to do this with the package in the repo because it adds a fftw depends which is quite big. I'll think about it.
Comment by Matteo Sasso (m.sasso) - Friday, 02 April 2010, 15:31 GMT
Ok, thank you; I thought it was a bug because --with-fftw is not mentioned anywhere in the installtion guide. I chose Archlinux because of the lack of bloat, so I see perfectly where you are coming from.

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