Results 271 to 280 of about 602,393 (302)

Ideological Differences in the Expanse of Empathy

2016
The American political landscape of the 21st century has largely been characterized by culture wars between liberals and conservatives. On policy issues as diverse as economic regulation, defense spending, abortion, marriage equality, and health care, ideological differences have become increasingly pronounced, as reflected in political legislation ...
Adam Waytz, Ravi Iyer, Liane Young, Jesse Graham   +3 more
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Difference Expansion-Based Data Hiding Method by Changing Expansion Media

2016
In this era, protecting secret data has played an important role since such data may be transmitted over public networks or stored in public storages. One possible method to protect the data is by implementing steganography/data hiding algorithms, such as Difference Expansion (DE).
Tohari Ahmad, Diksy M. Firmansyah, Dwi S. Angreni   +2 more
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An extended difference expansion algorithm for reversible watermarking

Image and Vision Computing, 2008
In this paper, a very high-capacity reversible watermarking algorithm is proposed. The algorithm extends Tian's method by histogram shifting to form a new type of pixel pair, which is called the shiftable pixel pair. The shiftable pixel pairs can increase the embedding capacity of a digital image while keeping the distortion low.
Hsien-Wen Tseng, Chin-Chen Chang 0001
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A Revisit of Query Expansion with Different Semantic Levels

2009
Query expansion has received extensive attention in information retrieval community. Although semantic based query expansion appears to be promising in improving retrieval performance, previous research has shown that it cannot consistently improve retrieval performance.
Ce Zhang 0001, Bin Cui 0001, Gao Cong, Yu-Jing Wang   +3 more
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Reversible data embedding using a difference expansion

IEEE Transactions on Circuits and Systems for Video Technology, 2003
Reversible 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), 2004
A 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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An Improved Reversible Difference Expansion Watermarking Algorithm

2008
In 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, Hyoung-Joong Kim, Shijun Xiang, Jeho Nam   +3 more
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Quasi-projection operators with applications to differential-difference expansions

Applied Mathematics and Computation, 2019
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Danilo Costarelli, Aleksandr V. Krivoshein, Maria Skopina, Gianluca Vinti   +3 more
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Introduction: Difference: Its Expansion and Consequences

2016
It 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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Holonomic Difference Equations and Asymptotic Expansion

2011
As 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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