Note: This page has been translated by MathWorks. Click here to see

To view all translated materials including this page, select Country from the country navigator on the bottom of this page.

To view all translated materials including this page, select Country from the country navigator on the bottom of this page.

2-D fast Fourier transform

`Y = fft2(X)`

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

`Y = fft2(`

returns
the two-dimensional
Fourier transform of a matrix using a fast Fourier transform
algorithm, which is equivalent to computing `X`

)`fft(fft(X).').'`

.
If `X`

is a multidimensional array, then `fft2`

takes
the 2-D transform of each dimension higher than 2. The output `Y`

is
the same size as `X`

.

Was this topic helpful?