Binomial transform Discrete Fourier transform, DFT Fast Fourier transform, a popular implementation of the DFT Discrete cosine transform Modified discrete cosine transform Discrete Hartley transform Discrete sine transform Discrete wavelet transform Hadamard transform (or, Walsh-Hadamard transform) Fast wavelet transform Hankel transform, the determinant of the Hankel matrix. Discrete Chebyshev transform Equivalent, up to a diagonal scaling, to a discrete cosine transform Finite Legendre transform Spherical Harmonic transform Irrational base discrete weighted transform Number-theoretic transform Stirling transform