Re: Antwort: FFT-Filtering - are non-symmetric masks useful?
Posted by
Albert Cardona on
Dec 12, 2007; 10:00pm
URL: http://imagej.273.s1.nabble.com/FFT-Filtering-are-non-symmetric-masks-useful-tp3697755p3697757.html
Joachim, Michael,
Just a note:
As far as I know, ImageJ's "FFT", which is an FHT as Joachim says,
does not properly replace FFT at all. When trying to rely on it for Cepstrum
and other uses related to registration we realized how much off it is
from a proper FFT: a lot.
We use FFT from jfftw.jar wrapper for native fftw libraries, and in
their absence,
the FFT classes from edu_mines_jtk.jar . Using these, results are as
analitically
expected.
There are a few example of its uses in the mpi.fruitfly package of TrakEM2,
implemented by Stephan Preibisch.
The git repos:
http://repo.or.cz/w/trakem2.gitThe archived source classes:
http://www.ini.uzh.ch/~acardona/piper.php?file=jars/TrakEM2-src.zipAlbert
--
Albert Cardona
http://www.mcdb.ucla.edu/Research/Hartenstein/acardona