Re: FFT implementation in ImageJ

Posted by bnorthan on
URL: http://imagej.273.s1.nabble.com/FFT-implementation-in-ImageJ-tp5008239p5008325.html

There is also a multi-dimensional implementation in imglib2 that seems to
work well.  It uses mines jtk which was originally licensed under GPL, but
there was talk they got permission to release it with a less restrictive
license (https://github.com/imglib/imglib/issues/38).


On Thu, Jun 19, 2014 at 11:46 AM, Burger Wilhelm <
[hidden email]> wrote:

> Hello Miriam,
>
> have you considered the FFT implementation in Apache Commons Math?:
>
> http://commons.apache.org/proper/commons-math/apidocs/org/apache/commons/math3/transform/FastFourierTransformer.html
>
> Works "out of the box" and results are correct.
>
> --Wilhelm Burger
>
> ________________________________________
> From: ImageJ Interest Group [[hidden email]] On Behalf Of Student1 [
> [hidden email]]
> Sent: Wednesday, June 18, 2014 23:58
> To: [hidden email]
> Subject: Re: FFT implementation in ImageJ
>
> Hi,
>
> First of all thanks for everybody’s input. I implemented an FFT algorithm
> by basically looking it up online and I am tracing through the calculation
> by hand to get a better understanding of the FFT. The FFT I implemented
> does not produce the image that should be produced by ImageJ. I was
> wondering if anyone can see where I am going wrong with my calculation. My
> work is here:
>
>
> http://stackoverflow.com/questions/24291896/fft-image-is-not-the-same-as-the-fft-image-produced-in-imagej
>
> Thanks.
>
> Mariam Dost
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> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>

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