:doc('opDCT2') opDCT2>         -  Two-dimensional discrete cosine transform (DCT)
% * <matlab:doc('opDFT') opDFT>          - Fast Fourier transform (DFT)
% * <matlab:doc('opDFT2') opDFT2>         - Two-dimensional fast Fourier transform (DFT)
% * <matlab:doc('opHaar') opHaar>         - Haar wavelet
% * <matlab:doc('opHaar2') opHaar2>        - 2-D Haar Wavelet
% * <matlab:doc('opHadamard') opHadamard>     - Hadamard matrix
% * <matlab:doc('opHeaviside') opHeaviside>    - Heaviside operator
% * <matlab:doc('o