Re: How to Get 1D Power Spectra from 2D FFT Image

Posted by Dean Waldow Email Lists on Mar 28, 2006; 5:43am
URL: http://imagej.273.s1.nabble.com/How-to-Get-1D-Power-Spectra-from-2D-FFT-Image-tp3703290p3703291.html

Hi,

You can try the radial profile plugin as Divakar suggests. I also  
ended up rewriting the radial profile plugin so the x-axis is wave  
vector to compare with scattering data. If that is of interest, let  
me know.

Dean Waldow


On Mar 27, 2006, at 7:07 PM, Ben wrote:

> Dear All,
>   Sorry for bothering.
>   I had a 2D TEM image and I already used ImageJ to get a 2D power  
> spectra. (FFT transform on the TEM image).
>    The problem is: I wan to average the radial intensity  
> distribution of all the direction on the 2D power spectra to get a  
> 1D power spectra. That is to say, how to extract a 1D magnitude of  
> the 2D transform. So, I am wondering is there such a plugin to  
> average over the azimuthal angel to yield the radial power spectra?
>    Thanks a lot and your respons will be well appreciated!
>   Regards
>   Ben
>
>
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