Mr. Hong Liu Profile

Hong Liu

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Proceedings Article | 14 November 2007 Paper

Realization of a novel meaningful digital image watermarking scheme

Hong Liu, Quan Liu

Proceedings Volume 6789, 678927 (2007) https://doi.org/10.1117/12.748991

KEYWORDS: Digital watermarking, Image compression, Image quality, Digital imaging, Image processing, Binary data, Medical imaging, Associative arrays, Multimedia, Data hiding

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In this paper, we propose a novel digital image scheme based on discrete cosine transformation (DCT). The most major difference between the traditional method and the proposed scheme is that it need not embed the watermark image into the original public image. Instead, separating the original image into many 8*8 pixels blocks and making DCT to every block, then extracting the DC(direct current) coefficient of each different block as the feature of the original image, thus we can gain a ownership map according to the feature of the original image and the watermark image. When piracy happens, the copyright owner can reveal his right via the ownership mapping and the feature of the suspected image to extracting the watermarking. In this process, we need not to be in virtue of the original public image. Moreover, the size of the watermark image is not restricted to be smaller than that of the original image. The experiment results are performed to demonstrate the robustness of the proposed scheme against several common attacks.

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