一种新的非对称数字水印算法

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Asymmetric digital watermarking algorithm based on DHT

LIU Xiang-li1;KOU Wei-dong1;WANG Zhi-guo2

(1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi′an 710071， China; 2. Key Lab. of Physical Electronics and Devices of the Ministry of Edu., Xi′an Jiaotong Univ., Xi′an 710049， China)

Received:1900-01-01 Revised:1900-01-01 Online:2008-02-20 Published:2008-01-20
Contact: LIU Xiang-li E-mail:xlliu@mail.xidian.edu.cn

Abstract

Abstract: An Asymmetric digital watermarking algorithm is proposed, based on the discrete Hartley transform (DHT). The energy of the reference watermark is redistributed in the DHT domain to get embedding watermarks. They have the same correlation with the reference one. The embedding watermarks can be detected by the reference one, but not by one another. To decide whether the watermark is present or not, the detector compares the correlation coefficient with the decision threshold. In addition, the proposed algorithm deals with real numbers, which increases the computing efficiency compared with those dealing with complex numbers.

Key words: Asymmetric digital watermarking, discrete Hartley transform (DHT), redistributed power, correlated watermarks

CLC Number:

TP391

LIU Xiang-li1;KOU Wei-dong1;WANG Zhi-guo2. Asymmetric digital watermarking algorithm based on DHT
[J].J4, 2008, 35(1): 129-132.

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Asymmetric digital watermarking algorithm based on DHT

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