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http://dx.doi.org/10.3745/KIPSTB.2002.9B.5.609

Digital Watermarking Using Watermark Reordering Based on Discrete Cosine Transform  

Bae, Sung-Ho (동명정보대학교 멀티미디어공학과)
Publication Information
The KIPS Transactions:PartB / v.9B, no.5, 2002 , pp. 609-614 More about this Journal
Abstract
Watermarking is embedding a digital signal called as watermark into images to claim the ownership. In this paper, a new digital watermarking algorithm based on DCT (Discrete Cosine Transform) which enhances invisibility and robustness is proposed to improve contentional digital watermarking method using DCT. In the proposed method, it is possible to enhance invisibility and robustness using watermark reordering in which the relative significance of original DCT coefficients can be preserved in watermarked DCT coefficients, and the distortions of original DCT coefficients can be minimized. The experimental results show that the proposed method improves invisibility approximately 9～12[dB] and is more robust to various attacks than the conventional method.
Keywords
Copyright protection; watermarking; watermark reordering; discrete cosine transform;
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Times Cited By KSCI : 1  (Citation Analysis)
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