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http://dx.doi.org/10.9717/kmms.2012.15.9.1102

A Robust Watermarking Method against Partial Damage and Geometric Attack  

Kim, Hak-Soo (성공회대학교 멀티미디어시스템공학과)
Publication Information
Journal of Korea Multimedia Society / v.15, no.9, 2012 , pp. 1102-1111 More about this Journal
Abstract
In this paper, we propose a robust watermarking method against geometric attack even though the watermarked image is partially damaged. This method consists of standard image normalization which transforms any image into a predefined standard image and embedding watermark in DCT domain of standard normalized image using spread spectrum technique. The proposed standard image normalization method has an improvement over existing image normalization method, so it is robust to partial damage and geometric attack. The watermark embedding method using spread spectrum technique also has a robustness to image losses such as blurring, sharpening and compressions. In addition, the proposed watermarking method does not need an original image to detect watermark, so it is useful to public watermarking applications. Several experimental results show that the proposed watermarking method is robust to partial damage and various attacks including geometric deformation.
Keywords
Watermarking; Image Normalization; Geometric Attack; Affine Transform;
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