Efficient common-core lossless and lossy image coder based on integer wavelets

被引：4
|
作者：
Grangetto, M [1 ]
Magli, E [1 ]
Olmo, G [1 ]
机构：
[1] Politecn Torino, Dipartimento Elettr, I-10129 Turin, Italy
来源：
SIGNAL PROCESSING | 2001年 / 81卷 / 02期
关键词：
image coding; integer wavelets; lifting scheme;
D O I：
10.1016/S0165-1684(00)00216-4
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The integer wavelet transform (IWT), applied to lossy-image compression, yields rate-distortion performance which is generally, slightly inferior to the discrete wavelet transform (DWT). In this paper, we propose a simple method which, based on the analysis of the IWT signal representation mechanism, is able to raise the IWT performance up to the DWT level. The method can be profitably employed for the implementation of a truly common-core lossless and lossy compression algorithm, with negligible loss of performance with respect to the classical, real-valued transform. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：403 / 408
页数：6
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