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http://dx.doi.org/10.5392/JKCA.2011.11.1.009

DCT Domain Zero-Watermarking based on CRT  

Kim, Hyoung-Do (한양사이버대학교)
Sohn, Kyu-Seek (한양사이버대학교)
Publication Information
The Journal of the Korea Contents Association / v.11, no.1, 2011 , pp. 9-15 More about this Journal
Abstract
Zero-watermarking is a digital watermarking technique that can escape from data distortion and quality degradation by no watermark insertion into digital images to be watermarked. This paper proposes DCT0CRT, a CRT-based zero-watermarking technique in the domain of DCT. One of the DC and low-frequency AC coefficients of each DCT block chosen in chaotic way from an image is selected by testing whether it satisfies the CRT-based condition matching with the watermark bit to be embedded. Such selection information forms a key to extract the watermark from the watermarked image. Experimental results show that the image quality watermarked by DCT0CRT is better than that watermarked by any other CRT-based watermarking techniques and the inserted watermark is robust against some common attacks such as sharpening, blurring, and JPEG lossy compression.
Keywords
Watermark; Zero-Watermarking; DCT; CRT;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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