Results 131 to 140 of about 420 (176)
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High Capacity Reversible Watermarking
2006 International Conference on Image Processing, 2006This paper proposes a high capacity low cost reversible watermarking scheme. Image is partitioned in pairs of pixels. In order to satisfy a congruence equation, the pairs obeying some simple constraints are transformed. By adding some correction data, the not transformed pixel pairs are enforced to obey the same equation, too.
Dinu Coltuc, Jean-Marc Chassery
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Reversible Watermarking for Compressed Speech
2008 Eighth International Conference on Intelligent Systems Design and Applications, 2008Reversible watermarking for compressed speech is proposed. Two properties of parameter-based speech coding bitstream are pointed out. Based on the properties, unimportant parameters are further compressed by entropy coding and concatenated with the watermark payload.
Mingyu Li, Yuhua Jiao, Xiamu Niu
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A New Approach in Reversible Watermarking
2009A great number of reversible watermarking methods have been put forward in the last few years. After analysis of some recent methods, we offer a new simple transform to increase the capacity applying just one iteration. Another advantage of our method is its simplicity.
Ahmad Mahmoudi Aznaveh +2 more
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On Local Prediction Based Reversible Watermarking
IEEE Transactions on Image Processing, 2015The use of local prediction in difference expansion reversible watermarking provides very good results, but at the cost of computing for each pixel a least square predictor in a square block centered on the pixel. This correspondence investigates the reduction of the mathematical complexity by computing distinct predictors not for pixels, but for ...
Ioan-Catalin Dragoi, Dinu Coltuc
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Reversible Watermarking with Subliminal Channel
2008With some difficulty in making more redundant capacity, only a symmetrically encrypted hash code is embedded in some reversible watermarking schemes, which makes it possible that a dishonest verifier fabricates legal contents. This paper shows that for reversible watermarking, by exploiting a subliminal channel, only a capacity of several more bytes ...
Xianfeng Zhao, Ning Li
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Expansion Embedding Techniques for Reversible Watermarking
IEEE Transactions on Image Processing, 2007Reversible watermarking enables the embedding of useful information in a host signal without any loss of host information. Tian's difference-expansion technique is a high-capacity, reversible method for data embedding. However, the method suffers from undesirable distortion at low embedding capacities and lack of capacity control due to the need for ...
Diljith M. Thodi, Jeffrey J. RodrÃguez
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An adaptive reversible watermarking in IWT domain
Multimedia Tools and Applications, 2020An adaptive reversible watermarking in integer wavelet transform (IWT) domain was proposed in this paper. It could adaptively embed according to the size of the watermark, achieve blind extraction, and the extracted image was completely lossless. A new method of embedding watermark into diagonal components based on the relationship between adjacent ...
Lingzhuang Meng +3 more
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Improved Capacity Reversible Watermarking
2007 IEEE International Conference on Image Processing, 2007This paper continues our researches on high capacity reversible watermarking based on simple transforms. Image pixels obeying some simple constraints are transformed and then, data is embedded by simple additions. The transform induces a congruence equation.
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Reversible Watermarking Techniques
2021Digital content security gained immense attention over past two decades due rapid digitization of industries and government sectors, and providing security to digital content became a vital challenge. Digital watermarking is one prominent solution to protect digital content from tamper detection and content authentication. However, digital watermarking
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An improved mechanism for reversible watermarking of images
SPIE Proceedings, 2013Reversible watermarking algorithms allow extraction of the hidden information to ensure authenticity and restore original medium. Prediction-error expansion (PEE) methods give high payload with little or no visible distortion. In these methods performance of the algorithm relies heavily on predictor`s response.
Muhammad Ishtiaq +3 more
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