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Erschienen in:
2009 | OriginalPaper | Buchkapitel
Scalability Evaluation of Blind Spread-Spectrum Image Watermarking
verfasst von : Peter Meerwald, Andreas Uhl
Erschienen in: Digital Watermarking
Verlag: Springer Berlin Heidelberg
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In this paper, we investigate the scalability aspect of blind watermark detection under combined quality and resolution adaptation of JPEG2000 and JPEG coded bitstreams. We develop two multi-channel watermarking schemes with blind detection, based on additive spread-spectrum watermarking: one employs the DCT domain, the other the DWT domain. We obtain watermark scalability by combining detection results from multiple channels modeled by Generalized Gaussian distributions. Both schemes achieve incremental improvement of detection reliability as more data of a scalable bitstream becomes available.