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ICIP
2002
IEEE

Waterfilling: a connection between information theoretic and perceptually based watermarking

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Waterfilling: a connection between information theoretic and perceptually based watermarking
We present a hybrid approach to image watermarking that exploits results from both information theory and perceptual studies. Towards this purpose we use a waterfilling-type algorithm to establish a connection between information theoretic and perceptually based watermarking. Information theoretic capacity formula for a Gaussian signal over a Gaussian channel is used and some parameters of the corresponding waterfilling-type algorithm are chosen based on a perceptual criterion. Image sub-blocks to be watermarked are chosen based on local statistics of each sub-block and the embedded watermark strength for each of these sub-blocks are computed based on a perceptual criterion. Towards this end an iterative algorithm is proposed. Experimental results are presented to discuss the trade-off between information theoretic capacity, robustness and perceptual distortion.
Siva Somasundaram, Rajarathnam Chandramouli
Added 24 Oct 2009
Updated 24 Oct 2009
Type Conference
Year 2002
Where ICIP
Authors Siva Somasundaram, Rajarathnam Chandramouli
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