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Spread-spectrum watermarking, in which random noise is added to transform coefficients and detected with a correlation operator has become a preferred paradigm for many watermarking applications. This paper analyzes the performance of such a watermarking system when the underlying transform is a tight frame rather than a traditional orthonormal expansion. The analysis indicates that a tight frame offers no inherent performance advantage over an orthonormal transform in the watermark-detection process despite the well known ability of redundant transforms to accommodate greater amounts of added noise for a given distortion.
Multimedia and Expo, 2002. ICME '02. Proceedings. 2002 IEEE International Conference on (Volume:2 )
Date of Conference: 2002