Analysis of ISB watermarking model: block based methods vs embedding repetition methods
Proceedings of the 9th International Conference on Advances in Mobile Computing and Multimedia
A highly robust two-stage Contourlet-based digital image watermarking method
Image Communication
Bayesian Segmentation Based Local Geometrically Invariant Image Watermarking
Fundamenta Informaticae
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High dynamic range (HDR) images represent the future format for digital images since they allow accurate rendering of a wider range of luminance values. However, today special types of preprocessing, collectively known as tone-mapping (TM) operators, are needed to adapt HDR images to currently existing displays. Tone-mapped images, although of reduced dynamic range, have nonetheless high quality and hence retain some commercial value. In this paper, we propose a solution to the problem of HDR image watermarking, e.g., for copyright embedding, that should survive TM. Therefore, the requirements imposed on the watermark encompass imperceptibility, a certain degree of security, and robustness to TM operators. The proposed watermarking system belongs to the blind, detectable category; it is based on the quantization index modulation (QIM) paradigm and employs higher order statistics as a feature. Experimental analysis shows positive results and demonstrates the system effectiveness with current state-of-art TM algorithms.