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Symmetric convolution of asymmetric multidimensional sequences using discrete trigonometric transforms

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2 Author(s)
Foltz, T.M. ; Air Command & Staff Coll., Maxwell Air Force Base, AL, USA ; Welsh, B.M.

This paper uses the fact that the discrete Fourier transform diagonalizes a circulant matrix to provide an alternate derivation of the symmetric convolution-multiplication property for discrete trigonometric transforms. Derived in this manner, the symmetric convolution-multiplication property extends easily to multiple dimensions using the notion of block circulant matrices and generalizes to multidimensional asymmetric sequences. The symmetric convolution of multidimensional asymmetric sequences can then be accomplished by taking the product of the trigonometric transforms of the sequences and then applying an inverse trigonometric transform to the result. An example is given of how this theory can be used for applying a two-dimensional (2-D) finite impulse response (FIR) filter with nonlinear phase which models atmospheric turbulence

Published in:

Image Processing, IEEE Transactions on  (Volume:8 ,  Issue: 5 )

Date of Publication:

May 1999

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