اشترك بالحزمة الذهبية واحصل على وصول غير محدود شمرا أكاديميا
تسجيل مستخدم جديدDouble Sided Watermark Embedding and Detection with Perceptual Analysis
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In our previous work, we introduced a double-sided technique that utilizes but not reject the host interference. Due to its nice property of utilizing but not rejecting the host interference, it has a big advantage over the host interference schemes in that the perceptual analysis can be easily implemented for our scheme to achieve the locally bounded maximum embedding strength. Thus, in this work, we detail how to implement the perceptual analysis in our double-sided schemes since the perceptual analysis is very important for improving the fidelity of watermarked contents. Through the extensive performance comparisons, we can further validate the performance advantage of our double-sided schemes.
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The embedder and the detector (or decoder) are the two most important components of the digital watermarking systems. Thus in this work, we discuss how to design a better embedder and detector (or decoder). I first give a summary of the prospective a
pplications of watermarking technology and major watermarking schemes in the literature. My review on the literature closely centers upon how the side information is exploited at both embedders and detectors. In Chapter 3, I explore the optimum detector or decoder according to a particular probability distribution of the host signals. We found that the performance of both multiplicative and additive spread spectrum schemes depends on the shape parameter of the host signals. For spread spectrum schemes, the performance of the detector or the decoder is reduced by the host interference. Thus I present a new host-interference rejection technique for the multiplicative spread spectrum schemes. Its embedding rule is tailored to the optimum detection or decoding rule. Though the host interference rejection schemes enjoy a big performance gain over the traditional spread spectrum schemes, their drawbacks that it is difficult for them to be implemented with the perceptual analysis to achieve the maximum allowable embedding level discourage their use in real scenarios. Thus, in the last chapters of this work, I introduce a double-sided technique to tackle this drawback. It differs from the host interference rejection schemes in that it utilizes but does not reject the host interference at its embedder. The perceptual analysis can be easily implemented in our scheme to achieve the maximum allowable level of embedding strength.
Recently, a self-embedding fragile watermark scheme based on reference-bits interleaving and adaptive selection of embedding mode was proposed. Reference bits are derived from the scrambled MSB bits of a cover image, and then are combined with authen
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Compressed videos constitute 70% of Internet traffic, and video upload growth rates far outpace compute and storage improvement trends. Past work in leveraging perceptual cues like saliency, i.e., regions where viewers focus their perceptual attentio
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