Content Based Image Public Watermarking

dc.contributor.authorHengfu, Yangen_US
dc.contributor.authorZihua, Yangen_US
dc.contributor.authorMingfang, Jiangen_US
dc.contributor.editorN. Correia and J. Jorge and T. Chambel and Z. Panen_US
dc.date.accessioned2014-01-26T16:16:45Z
dc.date.available2014-01-26T16:16:45Z
dc.date.issued2004en_US
dc.description.abstractIn this paper, a content based image public watermarking technique which operates in DCT domain is proposed. First, the 8×8 DCT sub-blocks of the host image are rearranged into a Hilbert sequence in Hilbert scanning order, then two neighboring sub-blocks in the Hilbert sequence is pseudo-randomly selected by using chaotic sequences. Then a watermark with visually recognizable pattern is embedded into the original image by changing the polarity of the corresponding middle-frequency coefficients in the two chosen neighboring sub-blocks, and the watermark is adapted to the image by exploiting the masking characteristics of the human visual system (HVS), thus ensuring the watermark invisibility, and the watermark don't need the original image. The experimental results show that the proposed algorithm in this paper is robust to common signal processing techniques and some geometric distortions, such as cropping, scaling and rotation. Especially, it achieves high robustness under signal enhancement operations, such as sharpening, contrast enhancement, edge enhancement and histogram equalization.en_US
dc.description.seriesinformationEurographics Multimedia Workshopen_US
dc.identifier.isbn3-905673-17-7en_US
dc.identifier.issn1812-7118en_US
dc.identifier.urihttps://doi.org/10.2312/EGMM/MM04/163-172en_US
dc.publisherThe Eurographics Associationen_US
dc.titleContent Based Image Public Watermarkingen_US
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