Re: FFT along line in image

Posted by Gluender on Oct 23, 2007; 4:10pm
URL: http://imagej.273.s1.nabble.com/FFT-along-line-in-image-tp3698130p3698138.html

Dear Jon Harman,

what you are looking for is the 1D Fourier Transformation which has
no direct relation to image processing. Consequently, you may have a
look at general signal rpocessing software. You will find a lot of
free 1D FFT code in the internet. I sometimes use a macro that comes
with Kaleidagraph that in turn can be use in a demo mode for free
(Mac & Windows versions available).

>Hi,
>
>Is there a plugin to ImageJ that can calculate the FFT along a line
>in the image and display the result (say for instance plot the power
>spectrum)?
>
>Jon

I suggest to export the line data etc.

If precision and computational effort is not an issue you may even
apply a 2D FFT to the line (set the rest of the image to zero) and
you will get the Fourier spectrum of this line projected in one
dimension.

HTH
--


                   Herbie

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