Orthogonal transform watermarking techniques for authentification of digital images and documents
In our transform-domain-based watermarking algorithms, two-level quantization is employed for both watermark embedding and extraction processes. Our public watermarking method is essentially extended from the semi-private approach and a spread-spectrum (SS) technique, which has been widely used in d...
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| Format: | Thesis |
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2008
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| Online Access: | https://hdl.handle.net/10356/3253 |