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A Set of Invariants Within the Power Spectrum of Unitary Transformations

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3 Author(s)
Wendling, S. ; Laboratory of Artificial Intelligence, University of Besancon ; Gagneux, G. ; Stamon, G.

This correspondence presents a device for designing unitary transformations based on the Hadamard transform process. The notion of "invariants" within the power spectrum of one-dimensional transformations is developed and the specific case of some widespread transformations is considered. The results are extended to two-dimensional transformations and a character recognition experiment using the invariants thus obtained is presented.

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Computers, IEEE Transactions on  (Volume:C-27 ,  Issue: 12 )