how does this compare to Fast Fourier transform ?
https://en.wikipedia.org/wiki/Fast_Fourier_transform
Or the Discrete Cosine Transform ?
https://en.wikipedia.org/wiki/Discrete_cosine_transform
Or the Gabor Transform ?
https://en.wikipedia.org/wiki/Fast_Fourier_transform
Or the Discrete Cosine Transform ?
https://en.wikipedia.org/wiki/Discrete_cosine_transform
Or the Gabor Transform ?