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MathGroup Archive 2000

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image 2-d Fouriertransform ?

  • To: mathgroup at
  • Subject: [mg21867] image 2-d Fouriertransform ?
  • From: maurus <maurus at>
  • Date: Wed, 2 Feb 2000 22:54:23 -0500 (EST)
  • Organization: [posted via] Leibniz-Rechenzentrum, Muenchen (Germany)
  • Sender: owner-wri-mathgroup at


sorry for this question but ..

i have a 2-d image with 8 bit grey level.
Now i make a 2-d-Fouriertransform of the image (in  Mathematica)
The result is a Picture with 4 quadrants, were the signals are

Now my questions:
I think, only the first quadrant ist important ? Rest ist random ?
What does the axis, the results  means ?

If someone canl help me, i can send an example for better understanding.

In this case, the Helpfunktion in Mathematica ist not to good.

Thanks in advance


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