Function Index
	DiscreteFourierTransform DiscreteFourierTransform[img] returns the discrete Fourier transform (DFT) of img. DiscreteFourierTransform[img, {n1,n2,...}] returns the DFT of a zero-padded img with dimensions n1×n2×... . The 1D DFT of a sequence x[n] is defined as X[k] = x[n] -j k n ,        0≤ k ≤ N-1 The 2D DFT of a sequence x[n1,n2] is defined as for 0≤k1≤N1-1 and 0≤k2≤N2-1, with . The argument img may be any list or ImageData expression. See also User's Guide 8.2, 8.3. Example This loads the package. In[1]:= This computes and displays the DFT of a bright rectangle on a dark background. In[2]:= Here we display the magnitude and phase of the DFT. In[3]:=