Article View: sci.image.processing
Article #256Re: FFT's. Help with Region Segmentation
From: Jeffrey Mulligan
Date: Thu, 06 Aug 1992 22:59
Date: Thu, 06 Aug 1992 22:59
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alien@essex.ac.uk ("Adrian F Clark") writes:
>The equation that describes the 2-D FFT is `separable', which means
>that it can be decomposed into a series of 1-D FFTs. In other words,
>you FFT along all the rows, then FFT down all the columns. (This is
>not, however a very efficient way to do it!) ^^^^^^^
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
I don't understand this remark; could you elaborate?
>Most image processing
>books go into this topic in a little detail.
Which is your favorite?
--
Jeff Mulligan (jbm@eos.arc.nasa.gov)
NASA/Ames Research Ctr., Mail Stop 262-2, Moffett Field CA, 94035
(415) 604-3745
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Newsgroups: sci.image.processing Path: arc1-ca.pugleaf.net!sparky!uunet!stanford.edu!ames!eos!jbm From: jbm@eos.arc.nasa.gov (Jeffrey Mulligan) Subject: Re: FFT's. Help with Region Segmentation Message-ID: <1992Aug6.225902.28373@eos.arc.nasa.gov> Organization: NASA Ames Research Center References: <1992Aug6.111336.9896@waikato.ac.nz> <ALIEN.92Aug6090438@vulcan.essex.ac.uk> Distribution: usa Date: Thu, 6 Aug 1992 22:59:02 GMT Lines: 24