Naslov
2-D Nonseparable Wavelet Filter Bank With Adaptive Filter Parameters

Autori
Seršić, Damir ; Vrankić, Miroslav

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
EUSPICO 2002, XI European Signal Processing Conference, Proceedings Vol. I / Castanie, Francis ; Lambert-Nebout, Catherine - Toulouse : TeSA, France, 2002, 137-140

Skup
EUSPICO 2002, XI European Signal Processing Conference,

Mjesto i datum
Toulouse, Francuska, 03.09.2002. - 06.09.2002

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
2D wavelet filter bank; non-separable wavelets; adaptive wavelets

Sažetak
In this paper, a novel realization of two-dimensional nonseparable wavelet filter bank with adaptive filter parameters is proposed. Two-dimensional generalization of the previously presented 1-D scheme [4] is based on nonseparable quincunx decimation. 2-D filters are designed directly rather then obtained from 1-D filters using the pyramid scheme. Described space variant wavelet filter bank has several advantages when compared to fixed banks. Basic convergence and regularity properties of the limit wavelet functions and scales are provided by fixed part of the filter bank. Variable part of the bank adapts to the analyzed signal. Realization is based on the lifting scheme, derived from a method of fixed 2-D wavelet filter bank design. Original 2-D interpolation of samples in the space domain is modified to an approximation scheme that can be recomputed at each step of decomposition. Adaptation criterion is calculated from wavelet coefficients. Wavelet filter banks with adaptive filter parameters can outperform fixed banks in a number of applications, but the suitable adaptation criterion is still to be found.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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