Spot operator: opDFT2 | Spot Home Page |
opDFT2 Two-dimensional fast Fourier transform (DFT). opDFT2(M,N) creates a two-dimensional normalized Fourier transform operator for matrices of size M by N. Input and output of the matrices is done in vectorized form. opDFT2(M,N,CENTERED) just like opDFT2(M,N), but with components shifted to have to zero-frequency component in the center of the spectrum, if the CENTERED flag is set to true.