Design and implementation of improved watermarking system in WT domain

doi:1005-8885 (2007) 02-0058-06

中国邮电高校学报(英文) ›› 2007, Vol. 14 ›› Issue (2): 58-63.doi: 1005-8885 (2007) 02-0058-06

Design and implementation of improved watermarking system in WT domain

张登银;陈家平;孙俊才

Nanjing University of Posts and Telecommunications

收稿日期:2006-10-12 修回日期:1900-01-01 出版日期:2007-06-30

Design and implementation of improved watermarking system in WT domain

ZHANG Deng-yin;CHEN Jia-ping; SUN Jun-cai

Nanjing University of Posts and Telecommunications

Received:2006-10-12 Revised:1900-01-01 Online:2007-06-30

摘要/Abstract

摘要：

This article presents a watermarking algorithm based on one-dimensional (1-D) chaotic map in wavelet transform (WT) domain. Traditional encryption and watermarking technologies in the WT domain are combined in this algorithm. First, the watermark is encoded by a chaotic sequence, which is generated by a key. On the basis of human visual system (HVS), it is then divided into two parts and embedded into the low- and intermediate-frequency bands of three-layer WT domain. The encryption of the watermark and the choice of embedded areas based on the perceptivity not only confer the watermark with good invisibility but also with good robustness. Meanwhile, it is difficult to decrypt the watermark extracted from the WT domain.

关键词:

watermarking; chaotic map; WT; invisibility; robustness

Abstract:

Key words:

watermarking;chaotic map; WT; invisibility; robustness

中图分类号:

TP391

ZHANG Deng-yin;CHEN Jia-ping; SUN Jun-cai. Design and implementation of improved watermarking system in WT domain[J]. Acta Metallurgica Sinica(English letters), 2007, 14(2): 58-63.

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Design and implementation of improved watermarking system in WT domain

Design and implementation of improved watermarking system in WT domain

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