Exploitation and extension of the region-of-interest coding functionalities in JPEG2000

作     者：Signoroni, A Lazzaroni, F Leonardi, R 

作者机构：Univ Brescia Signals & Commun Lab DEA I-25123 Brescia Italy 

出 版 物：《IEEE TRANSACTIONS ON CONSUMER ELECTRONICS》 (IEEE Trans Consum Electron)

年 卷 期：2003年第49卷第4期

页      面：818-823页

核心收录：

学科分类：0810[工学-信息与通信工程] 0808[工学-电气工程] 08[工学] 

基　　金：1 This work was supported in part by the European Community Network of Excellence "SCHEMA". The Authors are with the Signals and Communications Lab. – DEA  University of Brescia  via Branze no.38  I25123 Brescia  ITALY (e-mail: firstname.lastname@ing.unibs.it). Contributed Paper Manuscript received September 25  2003 0098 3063/00 $10.00 © 2003 IEEE 

主　　题：image quality JPEG2000 selective ROI coding wavelet transform 

摘      要：The purpose of this paper is to present a technique to extend the functionality and the application fields of a spatially selective coding within a JPEG2000 framework. The image quality drop between the Regions of Interest (ROI) and the background (BG) is considered. From the conventional point of view, the reconstructed image quality steeply drops along the ROI boundary;however this effect can be considered or perceived to be objectionable in some situations. We here propose a simple quality decay management, which makes use of concentric ROI with different scaling factors. This allows the technique to be perfectly consistent with the JPEG2000 part 2 ROI definition and description. The proposed techniques may have a significant impact on applications where both coding rate minimization and coded image quality are important and/or become critical factors. Experiments and examples demonstrate the benefits of the presented approach(1).