Describe FFT: Properties/Frequency Needed

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The discussion centers on understanding a specific 2D Fast Fourier Transform (FFT) image linked in the thread. Participants express confusion about the lack of axes in the image and seek clarification on its properties and frequency. There is a request for guidance on using C++ libraries to compute Discrete Fourier Transforms (DFT). Additionally, assistance is sought for performing a numerical Fourier transform of a Bessel function using FFT. The conversation highlights the need for more information on FFT applications and computational methods.
mgberlin
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Could somone possibly describe this http://home.bak.rr.com/berlin/088821368-guess1.jpg FFT. I need to know the properties and frequency. Thanks for anyone's time who helps.

(BTW, if this is in the wrong forum, I could use some redirection).
 
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That's a fast Fourier transform?

I don't see any axes... what are we looking at? :confused:
 
Psst... it's a 2D FFT. (I don't know what it means though.)

- Warren
 
how can i make use of libraries available to do those in C++ to compute DFT

also I would be so grateful if you could help me for numerical fourir transform of bessel function using FFT
 

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