Re: Fourier Transform

Posted by Michael Schmid on Dec 06, 2019; 4:50pm
URL: http://imagej.273.s1.nabble.com/Fourier-Transform-tp5022753p5022761.html

Hi Sara,

the standard ImageJ Process>FFT command works with images of any size.
The image is padded with a constant value (equal to the average pixel
value) to the next power of two.

For the Fourier-domain filter operations, the image is padded to a power
of two by taking the border as a mirror.
Only the Process > FD Math operations need square input images where the
side length is a power of two.


Michael
________________________________________________________________
On 05.12.19 18:47, Sara_24 wrote:

> Hi
> Is there any command in ImageJ to calculate the Fourier transform of images
> with the size of non-power of two?
>
> Best regards,
> Sara
>
>
>
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>
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