Naslov
Adaptation of a 2-D Nonseparable Wavelet Filter Bank with Variable Number of Zero Moments

Autori
Seršić, Damir ; Vrankić, Miroslav

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

Izvornik
A Proceedings of the Second IAESTED International Conference on Visualization, Imaging and Image Processing / Villanueva, J.J. - Anaheim : Calgary : Zurich : ACTA Press, 2002, 257-260

Skup
The Second IAESTED International Conference on Visualization, Imaging and Image Processing

Mjesto i datum
Málaga, Španjolska, 09.09.2002. - 12.09.2002

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

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

Sažetak
In this paper, we compare different adaptation criterions of the proposed two dimensional wavelet filter bank with a variable number of zero moments. Twodimensional generalization of the previously reported 1- D algorithm is based on nonseparable quincunx scheme. 2-D filters were designed directly, rather then obtained from 1-D filters using pyramid scheme. Filter banks with more zero moments are better for representing smooth parts of the analyzed signal, while shorter filters are more suitable for edges and singularities. When applied to images, variable zero moment 2-D wavelets result in low ripple on edges and good concentration of wavelet coefficients in smooth parts. We discuss different adaptation algorithms based on the size of adaptation area. Chosen criterion determines decomposition properties and robustness. Results on synthetic and real images are presented.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA