| Title |
A new Le Gall wavelet-based approach to progressive encoding and transmission of image blocks |
| Another Title |
Naujas Le Gall bangelėmis grindžiamas požiūris į progresyvųjį vaizdo blokų kodavimą ir perdavimą. |
| Authors |
Kančelkis, Deividas ; Valantinas, Jonas |
| DOI |
10.5755/j01.itc.41.3.920 |
| Full Text |
|
| Is Part of |
Informacinės technologijos ir valdymas = Information technology and control.. Kaunas : Technologija. 2012, t. 41, Nr. 3, p. 239-247.. ISSN 1392-124X. eISSN 2335-884X |
| Keywords [eng] |
Digital images ; Discrete wavelet transforms ; Le Gall wavelets ; Lifting schemes ; Image processing ; Progressive image encoding ; ROI |
| Abstract [eng] |
In this paper, a modified version of the discrete reversible (integer-to-integer) Le Gall wavelet transform (DLGT), distinguishing itself by apparently improved space localization properties and visibly extended potential capabilities, is proposed. The key point of the proposal – ensuring full decorrelation of Le Gall wavelet coefficients across the lower scales. Based on the latter circumstance, a novel exceptionally fast procedure for computing the integer DLGT spectra of the selected image blocks (regions of interest - ROI) is presented. It is shown that the new developments can be efficiently applied to progressive encoding and transmission of image blocks. Progressive encoding and transmission of image blocks is achieved by first transmitting a “rough” estimate of the original image, then sending further details related to one or another image block (ROI). To translate the idea into action, the zero-treebased encoder SPIHT (Set Partitioning in Hierarchical Trees) with an improved quad-tree analysis scheme is employed. |
| Published |
Kaunas : Technologija |
| Type |
Journal article |
| Language |
English |
| Publication date |
2012 |
| CC license |
|
