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Re: P.S. to John!!!

  • From: P3D Jim Crowell <crowell@xxxxxxxxxxxxxxx>
  • Subject: Re: P.S. to John!!!
  • Date: Thu, 31 Oct 1996 15:43:36 -0800
At 6:40 AM 10/22/96, P3D  William Carter wrote:
>
>Hmmm.
>So  what's Fourier magnitude/phase mean???
>

A Fourier Transform is basically a description of an image as a sum of
sinewaves of various spatial frequencies, magnitudes, orientations, and
phases.  Blurring an image basically means you've selectively decreased the
magnitudes of the high-frequency components.  A phase difference basically
refers to a change in position.

-Jim C.

----------------------
Jim Crowell
Division of Biology
216-76
Caltech
Pasadena, CA
(818) 395-8337
jim@xxxxxxxxxxxxxxx



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