Describe this FFT

[mgberlin]

Could somone possibly describe this 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).

[enigma]

That's a fast fourier transform?

I don't see any axes... what are we looking at? :confused:

[chroot]

Psst... it's a 2D FFT. (I don't know what it means though.)

- Warren

[nada]

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