CRT and ART Based Watermarking Scheme in DCT Domain
V. Priyanka1, M. Nireesha2, V. Venu Kumar3, N. Venkat Ram4, A. S. N. Chakravarthy5
1V. Priyanka, B.Tech, Ece Departmentkl University. India.
2M.Nireesha, B.Tech, Ece Department, Kl University. India.
3V. Venu Kumar, B.Tech,Ece Department, Kl University. India.
4N.Venkat Ram, Associate Dean, Ecm  Department, Kl University, India.
5Dr. A.S.N. Chakravarthy, Professor, Ecm Department, Kl University. India.
Manuscript received on March 02, 2012. | Revised Manuscript received on March 31, 2012. | Manuscript published on April 30, 2012. | PP: 87-90 | Volume-1 Issue-4, April 2012 | Retrieval Number: D0257031412/2012©BEIESP

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Abstract: In this paper, we propose Chinese Remainder Theorem (CRT) and Aryabhata Remainder Theorem (ART) based watermarking scheme that work in the Discrete Cosine Transform (DCT) domain.CRT based scheme is more resistant to different types of attacks, particularly to JPEG compression; in addition, it improves the security feature of the watermarking scheme. Experimental results have shown that the proposed scheme makes the watermark perceptually invisible and has better robustness to common image manipulation techniques. ART-based algorithm can be applied to any kind of moduli and its computation cost is less than that of the CRT-based algorithm. Both techniques can be applied for protection of images and information. 
Keywords: CRT, ART, DCT, Residue, Remainder, Inverse.