V. Chernov (Russia)
FFT, overlapped algorithms, color images.
The paper deals with some new algorithms for ”over lapped” calculating ½ and ¾ DFT spectra of a multi channel signal. The algorithms’ computational complexity is decreased via the fast calculation of an auxiliary trans form that takes values in special algebraic structures: the group algebra of a quaternion units group and the algebra associated with integral Hurwitz quaternions.
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