Transforms
- dct — Discrete cosine transform.
- dst — Discrete sine transform.
- fft — Direct or inverse Fast Fourier Transform of a vector, matrix, or hypermatrix
- fft2 — two-dimension fast Fourier
transform
- fftshift — rearranges the fft output, moving the zero frequency to the center of the spectrum
- hilb — FIR approximation to a Hilbert transform filter
- ifftshift — inverse of fftshift