Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)
- 2003.11a
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- Pages.217-220
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- 2003
Wavelet-based Watermarking using Correlation Comparison
상관도 비교를 이용한 웨이블릿 기반 워터마킹
- Lee, Hyun-Suk (Digital Contents Protection and Computer Game Laboratory Department of Image Engineering Graduate School of Advanced Imaging Science, Multimedia and Film, Chung-Ang University) ;
- Vivi Oktavia (Digital Contents Protection and Computer Game Laboratory Department of Image Engineering Graduate School of Advanced Imaging Science, Multimedia and Film, Chung-Ang University) ;
- Lee, Won-Hyung (Digital Contents Protection and Computer Game Laboratory Department of Image Engineering Graduate School of Advanced Imaging Science, Multimedia and Film, Chung-Ang University)
- Published : 2003.11.01
Abstract
This paper presents a wavelet-based digital watermarking scheme for color images. We insert watermarks in the DWI domain using spread-spectrum correlation-based watermarking in luminance component of the color image. The watermark, two pseudorandom patterns, is inserted by modifying the wavelet coefficients at subband HL2, LH2, HH2 according to message bits. To detect watermark, we calculate the correlation between the watermarked image and pseudorandom patterns. As compared with correlations, the watermark detector determines embedding message. Experimental results show that the scheme is not only invisible but also robust to various attacks such as JPEG compression, noise addition and so on.
Keywords