fft2() - Image Processing

Y = fft2(X) returns the
two-dimensional discrete Fourier transform (DFT) of X.
The DFT is computed with a fast Fourier transform (FFT) algorithm.
The result, Y, is the same size as X.If the dimensionality of X is greater than 2,
the fft2 function returns the 2-D DFT for each
higher dimensional slice of X. For example, if size(X)
= [100 100 3], then fft2 computes the
DFT of X(:,:,1), X(:,:,2) and X(:,:,3).Y = fft2(X,m,n) truncates X,
or pads X with zeros to create an m-by-n array
before doing the transform. The result is m-by-n.

Syntax

Y = fft2(X)Y = fft2(X,m,n)

Example

fft(fft(X).').'

Output / Return Value

Limitations

Alternatives / See Also

Reference