| Abstract |
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Invertible watermarking has been introduced in the literature for the purpose of image authentication. We present in this paper a spread-spectrum invertible watermarking system which can be used to authenticate images in any lossless format, i.e. establish their integrity. A second application of invertible watermarking is multilevel access to watermarked images: depending on her clearance, the image user can ``clean'' the marks of more or less parts of the image, so as to gain in precision. Both applications make sense for precision-critical images (e.g. military, satellite, medical, quality control, reverse engineering images) whose copyright should still be protected to some extent.
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 Additional Information
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Index Terms- Invertible watermarking, copyright protection, precision-critical images, Selective release based on security clearance, Selective access to parts of a document
Citation:
Josep Domingo-Ferrer, Francesc Sebé,
"Invertible Spread-Spectrum Watermarking for Image Authentication and Multilevel Access to Precision-Critical Watermarked Images,"
itcc,
p. 0152,
International Conference on Information Technology: Coding and Computing,
2002
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