Naslov
Modified SPIHT algorithm for wavelet packet image coding

Autori
Šprljan, Nikola ; Grgić, Sonja ; Grgić, Mislav

Izvornik
Real-Time Imaging (1077-2014) 11 (2005), 5-6; 378-388

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
image coding; wavelet transforms; wavelet packets; SPIHT

Sažetak
This paper introduces a new implementation of wavelet packet decomposition which is combined with SPIHT (Set Partitioning in Hierarchical Trees) compression scheme. We provide the analysis of the problems arising from the application of zerotree quantisation based algorithms (such as SPIHT) to wavelet packet transform coefficients. We established the generalized parent-child relationships for wavelet packets, providing complete tree structures for SPIHT. The proposed algorithm can be used for both wavelet dyadic and Wavelet Packet decomposition (WP-SPIHT). An extensive evaluation of the algorithm was performed and it has been shown that WP-SPIHT significantly outperforms base-line SPIHT coder for texture images. For these images the suboptimal WP cost-function enables good enough energy compaction that is efficiently exploited by the WP-SPIHT.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika, Računarstvo

Napomena
Special Issue on Multi-Dimensional Image Processing Edited by Rastislav Lukac, Phillip A.Laplante and Konstantinos N. Plataniotis.

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