Olivier Albert wrote in message ... > >Anybody knows where i can find a labview vi that performe a 2D FFT? >
I seem to remember that one of the examples in the LV 5.0.1 Distribution as some 2D FFT capability - I can't remember the vi name though.
However if you are stuck a simple implementation of 2D FFT is
1) Wire your 2D data set into an indexing for loop 2) Within the loop FFT the 1D data arrays 3) Upon finishing the loop you now have data which is in the Fourier domain along rows but in the temporal/ spatial domain along cols. 4) Use the transpose 2D array function to swap rows and cols 5) repeat steps 1 and 2 6) Remeber to use the transpose 2D array function to swap rows and cols back again.
NB this routine will ret urn the data in a quadrant shuffled format (i.e. with the +/- Nyquist/2 values in the centre of the array)
For further info on the FFT (including 2D - FFT and quadrant arrangement) try having a look at
"The Fast Fourier Transform and its Applications" by E. Oran Brigham Publ: Prentice Hall
