Can't Mask FFT

Posted by Andrew Vaughan-2 on Oct 31, 2008; 3:42pm
URL: http://imagej.273.s1.nabble.com/Can-t-Mask-FFT-tp3694587.html

Dear All.

I've been trying to remove some line frequency interference from confocal images by generating FFTs
of the images and masking the frequencies using the region selection and fill method mentioned in
the online documentation. However, when I reverse Fourier transform the frequency domain image
the lines are still there. When I subsequently perform another FFT on the resulting image I find that
the region(s) have been ignored and the frequency domain image appears identical to the original.
I'm using Image J version 1.41g on an Intel Mac running OS X 10.4.11. The images are either slices
from Bio-Rad pic files or TIFFs of these.

Thanks.

Yours sincerely,

Andrew Vaughan.