ifft2() - Image Processing

Y = ifft2(X) returns the
two-dimensional inverse discrete Fourier transform (DFT) of X,
computed with a fast Fourier transform (FFT) algorithm. The result Y is
the same size as X.ifft2 tests X to see
whether it is conjugate symmetric. If so, the
computation is faster and the output is real. An M-by-N matrix X is
conjugate symmetric if X(i,j) = conj(X(mod(M-i+1,
M) + 1, mod(N-j+1, N) + 1)) for each element of X. Y = ifft2(X,m,n) returns
the m-by-n inverse fast Fourier
transform of matrix X.y = ifft2(..., 'symmetric') causes ifft2 to
treat X as conjugate symmetric. This option is
useful when X is not exactly conjugate symmetric,
merely because of round-off error.y = ifft2(..., 'nonsymmetric') is
the same as calling ifft2(...) without the argument 'nonsymmetric'.For any X, ifft2(fft2(X)) equals X to
within roundoff error.

Syntax

Y = ifft2(X)Y = ifft2(X,m,n)y = ifft2(..., 'symmetric')y = ifft2(..., 'nonsymmetric')

Example

You can give an example if you know one.

Output / Return Value

Limitations

Alternatives / See Also

Reference