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- W2588508760 abstract "Reversible Image Watermarking is a technique to losslessly embed and retrieve information (in the form of a watermark) in a cover image. Prediction Error Expansion based schemes are currently the most efficient and widely used reversible image watermarking techniques. Estimation of the minimum achievable (optimum) distortion for a given payload and a given cover image, is an important problem for reversible watermarking schemes. In this paper, we first show that the bounded capacity distortion minimization problem for prediction error expansion based reversible watermarking schemes is NP-hard, and that the corresponding decision version of the problem is NP-complete. We then propose a low computational overhead heuristic to estimate the minimal distortion. Our estimation technique first estimates (for a given image) the prediction error distribution function without explicit use of any prediction scheme, and then minimizes the distortion for a given payload by solving a convex optimization problem to estimate an embedding threshold parameter. Experimental results for common benchmark images closely match the predictions from our technique, and thus verify the consistency of our approach." @default.
- W2588508760 created "2017-02-24" @default.
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- W2588508760 date "2017-01-01" @default.
- W2588508760 modified "2023-09-23" @default.
- W2588508760 title "Optimal Distortion Estimation for Prediction Error Expansion Based Reversible Watermarking" @default.
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- W2588508760 doi "https://doi.org/10.1007/978-3-319-53465-7_20" @default.
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