IFFT: Compute an Inverse FFT

Form: IFFT [dest] source [ONEDIM]
source
buffer holding the fourier transform of a real image.
dest
will hold the inverse fourier transform of 'source'. If 'dest' is not specified, 'source' will be substituted by its transform.
ONEDIM
perform a 1D inverse transform for each row of 'source' rather than the 2D inverse transform of the whole image.

IFFT computes an inverse Fourier transform.