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Local-Prediction-Based Difference Expansion Reversible Watermarking
IEEE Transactions on Image Processing, 2014This paper investigates the use of local prediction in difference expansion reversible watermarking. For each pixel, a least square predictor is computed on a square block centered on the pixel and the corresponding prediction error is expanded. The same predictor is recovered at detection without any additional information.
Ioan-Catalin Dragoi, Dinu Coltuc
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An Improved Reversible Difference Expansion Watermarking Algorithm
2008In this paper, we propose an improved reversible watermarking algorithm by using the simplified location map. The proposed embedding method is based on the Alattar integer transform [3]. Here, we extend the case of using four pixels. Proposed simplified location map we propose just covers those necessary quads, the improved watermarking algorithm has a
Vasiliy Sachnev +3 more
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Reversible data embedding using a difference expansion
IEEE Transactions on Circuits and Systems for Video Technology, 2003Reversible data embedding has drawn lots of interest recently. Being reversible, the original digital content can be completely restored. We present a novel reversible data-embedding method for digital images. We explore the redundancy in digital images to achieve very high embedding capacity, and keep the distortion low.
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Reversible watermark using difference expansion of triplets
Proceedings 2003 International Conference on Image Processing (Cat. No.03CH37429), 2004A new reversible watermarking algorithm based on the difference expansion of colored images has been developed. Since the watermark is completely reversible, the original image can be recovered exactly. The algorithm uses spatial and spectral triplets of pixels to hide pairs of bits, which allows the algorithm to hide a large amount of data.
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Holonomic Difference Equations and Asymptotic Expansion
2011As we have seen in Chapter 1, the Γ-function is a solution of a first-order difference equation which can be uniquely determined by its asymptotic behavior at infinity. This fact can be generalized to the cases of several variables that contain a finite number of unknown meromorphic functions which satisfy a holonomic system of difference equations ...
Kazuhiko Aomoto, Michitake Kita
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Introduction: Difference: Its Expansion and Consequences
2016It is fitting that this volume, Learning from Difference, is characterized itself by great internal diversity. The nine national case studies that comprise the bulk of the content are as diverse as could be imagined, drawn from all parts of the world: Africa, Asia, Europe, the Americas and Australasia.
Aydin Bal, Joseph Lo Bianco
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The maxillary expansion with different devices
International Journal of Oral and Maxillofacial Surgery, 2015A. Kolk +5 more
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A Novel Reversible Data Hiding Algorithm Based on Enhanced Reduced Difference Expansion
Symmetry, 2022Phuoc-Hung Võ +2 more
exaly
Prevalence of different types of expansion appliance usage for maxillary expansion
International Journal of Pharmaceutical Research, 2020openaire +1 more source