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Low Power Block-Based Watermarking Algorithm Yu-Ting PAI Shanq-Jang RUAN Publication IEICE TRANSACTIONS on Information and Systems Vol.E89-D No.4 pp.1507-1514 Publication Date: 2006/04/01 Online ISSN: 1745-1361 DOI: 10.1093/ietisy/e89-d.4.1507 Print ISSN: 0916-8532 Type of Manuscript: PAPER Category: Application Information Security Keyword: digital watermark, data hiding, copyright protection, low power, discrete cosine transform, Full Text: PDF(1.9MB)>>
Summary: In recent years, digital watermarking has become a popular technique for labeling digital images by hiding secret information which can protect the copyright. The goal of this paper is to develop a DCT-based watermarking algorithm for low power and high performance. Our energy-efficient technique focuses on reducing computation required on block-based permutation. Instead of using spacial coefficients proposed by Hsu and Wu's algorithm [1], we use DCT coefficients to pair blocks directly. The approach is implemented by C language and estimated power dissipation using Wattch toolset. The experimental results show that our approach not only reduces 99% energy consumption of pairing mechanism, but also increase the PSNR by 0.414 db for the best case. Moreover, the proposed approach is robust to a variety of signal distortions, such as JPEG, image cropping, sharpening, blurring, and intensity adjusting. | ||||||||||
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