Y = ifft2(X)
Y = ifft2(X,m,n)
ifft2(X)returns the two-dimensional inverse fast Fourier transform of matrix
ifft(X,m,n) returns the
-n inverse transform.
Xto within roundoff error. If
ifft2(fft2(X))may have small imaginary parts.
ifft2(X)is the same as the algorithm for
fft2(X), except for a sign change and scale factors of
[m,n] = size(X). The execution time is fastest when
nare powers of 2 and slowest when they are large primes.
spectrumin the Signal Processing Toolbox
(c) Copyright 1994 by The MathWorks, Inc.