| Título: |
SPEEDING-UP IMAGE ENCODING TIMES IN THE SPIHT ALGORITHM |
| Autores: |
Valantinas, Jonas Kančelkis, Deividas |
| Fecha: | 2011-03-22 |
| Publicador: | Information technology and control |
| Fuente: |
 |
| Tipo: | Peer-reviewed |
| Tema: | discrete wavelet transforms; quad-trees; zero-tree based image coders; Le Gall wavelets; SPIHT |
| Descripción: |
In this paper, a new approach (scheme) to the analysis of quad-trees in the discrete wavelet spectrum of a digital image is proposed. During the pre-scanning phase, the proposed scheme generates problem-oriented binary codes for the whole set of quad-tree roots (wavelet coefficients) and thereby accumulates information on the signi-ficance of respective descendants (wavelet coefficients comprising quad-trees on the view). The developed scheme can be efficiently applied to any zero-tree based image coder, such as the embedded zero-tree wavelet (EZW) algorithm of Shapiro and set partitioning in hierarchical trees (SPIHT) by Said and Pearlman. Fairly impressive performance of the proposed quad-tree analysis scheme, in the sense of image encoding times, is demonstrated using the SPIHT algorithm and the discrete Le Gall wavelet transform.http://dx.doi.org/10.5755/j01.itc.40.1.187 |
| Idioma: | Inglés |