celticfutballer
09-19-2006, 01:17 PM
I'm having trouble deciphering the output of the rlft3 function for a 2d image. I've read the book and I'm still stumped. I started with trying to just take the fft of a sin(x*y) but without knowing how the output array is set up makes it hard to know if its doing it right. I've tried the scaling bit mentioned in the book for the inverse normalization, still no luck. I thought I saw something about wave numbers so I inverted the output (right or wrong, I'm not sure), then it at least looked like a frequency spectrum, but not the correct one. Is it some sort of big secret or does nobody really know and we just tell people to read the book? A little help would be divine.