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A group of linear spectral transformation for two-dimensional digital filters

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2 Author(s)
Costa, J. ; University of Toronto, Toronto, Ont., Canada. ; Venetsanopoulos, A.N.

There are eight linear transformations of the spectral plane which map the frequency axes onto themselves. These transformations can be used to change the pass and stop regions of a two-dimensional digital filter. A stable realization is assured by transforming the data rather than the system transfer function.

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Acoustics, Speech and Signal Processing, IEEE Transactions on  (Volume:24 ,  Issue: 5 )