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Analytical design of 3-D wavelet filter banks using the multivariate Bernstein polynomial

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1 Author(s)
Tay, D.B.H. ; Dept. of Electron. Eng., La Trobe Univ., Bundoora, Vic., Australia

The design of 3-D multirate filter banks where the downsampling/upsampling is on the FCO (face centred orthorhombic) lattice is addressed. With such a sampling lattice, the ideal 3-D sub-band of the low-pass filter is of the TRO (truncated octahedron) shape. The transformation of variables has been shown previously to be an effective technique for designing M-D (multidimensional) filter banks. A design technique is presented for the transformation function using the multivariate Bernstein polynomial which provides a good approximation to the TRO sub-band shape. The method is analytically based and does not require any optimisation procedure. Closed form expressions are obtained for the filters of any order. Another advantage of this technique is that it yields filters with a flat frequency response at the aliasing frequency (ω1, ω2 , ω3)=(π, π, π). This flatness is important for giving regular discrete wavelet transform systems

Published in:

Vision, Image and Signal Processing, IEE Proceedings -  (Volume:147 ,  Issue: 2 )

Date of Publication:

Apr 2000

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