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1. |
Record Nr. |
UNINA9910299201903321 |
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Autore |
Liu Feng |
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Titolo |
Visual Cryptography for Image Processing and Security : Theory, Methods, and Applications / / by Feng Liu, Wei Qi Yan |
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Pubbl/distr/stampa |
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Cham : , : Springer International Publishing : , : Imprint : Springer, , 2015 |
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ISBN |
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Edizione |
[2nd ed. 2015.] |
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Descrizione fisica |
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1 online resource (XVI, 167 p. 65 illus., 14 illus. in color.) |
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Disciplina |
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Soggetti |
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Optical data processing |
Computer security |
Coding theory |
Information theory |
Image Processing and Computer Vision |
Systems and Data Security |
Coding and Information Theory |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Bibliographic Level Mode of Issuance: Monograph |
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Nota di bibliografia |
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Includes bibliographical references and index. |
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Nota di contenuto |
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Introduction -- Various Problems in Visual Cryptography -- Cheating Prevention of Visual Cryptography -- Various Visual Cryptography Schemes -- Various Color Schemes of Visual Cryptography -- Various Applications of Visual Cryptography. |
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Sommario/riassunto |
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This unique text/reference addresses the fundamental concepts in the theory and practice of visual cryptography, a secret sharing technique which allows the encryption of an image without requiring any complex computation or knowledge of cryptography. The design, construction, analysis, and application of visual cryptography schemes (VCSs) are discussed in detail. Original, cutting-edge research is presented on probabilistic, size invariant, threshold, concolorous, and cheating immune VCS. This updated second edition has also been expanded with new content on braille and 2D barcode authentication of visual cryptography shares. Topics and features: • Contains review exercises at the end of each chapter, as well as a helpful glossary (NEW) • Provides a thorough introduction to the field of visual cryptography • |
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Examines various common problems in visual cryptography, including the alignment, flipping, cheating, distortion, and thin line problems • Reviews a range of visual cryptography schemes, including XOR-based visual cryptography and security enriched VCS • Describes different methods for presenting color content using visual cryptographic techniques • Covers such applications of visual cryptography as watermarking, resolution variant VCS, and multiple resolution VCS This logically-structured and comprehensive work will serve as a helpful reference for all researchers and students interested in do. |
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2. |
Record Nr. |
UNINA9910437589003321 |
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Autore |
Zhang Haijun |
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Titolo |
4G Femtocells : Resource Allocation and Interference Management / / by Haijun Zhang, Xiaoli Chu, Xiangming Wen |
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Pubbl/distr/stampa |
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New York, NY : , : Springer New York : , : Imprint : Springer, , 2013 |
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ISBN |
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Edizione |
[1st ed. 2013.] |
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Descrizione fisica |
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1 online resource (85 p.) |
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Collana |
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SpringerBriefs in Computer Science, , 2191-5768 |
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Disciplina |
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Soggetti |
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Electrical engineering |
Computer networks |
Computer system failures |
Communications Engineering, Networks |
Computer Communication Networks |
System Performance and Evaluation |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di bibliografia |
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Includes bibliographical references. |
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Nota di contenuto |
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Introduction to 4G Femtocells -- Ant Colony Algorithm (ACA) based Downlink Resource Allocation in Femtocells -- Cross-Tier Interference Pricing based Uplink Resource Allocation in Two-Tier Networks -- Resource Allocation in Femtocells with Cross-Tier Interference Limits -- Energy Efficient Power Control in Femtocells with Interference Pricing -- Differentiated-Pricing based Power Allocation in Dense Femtocell Networks -- Conclusions and Future Works. |
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Sommario/riassunto |
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This brief examines resource allocation and interference management for 4G femtocells. It introduces 4G femtocells in the context of 4G mobile networks and discusses related technical challenges in resource allocation and interference management. Topics include ant colony algorithm based downlink resource allocation, intelligent scheduling and power control, uplink and downlink for two-tier networks, quality of service (QoS) constraints and the cross-tier interference constraint. The authors present algorithms to alleviate common femtocell-related problems such as subchannel power allocation. The complexity of the proposed resource allocation algorithms is analyzed, and the effectiveness of the proposed algorithms is verified by simulations. This concise and practical book directly addresses common problems relating to femtocells and resource management. It serves as a useful tool for researchers in the field. Advanced-level students or professionals interested in femtocells and networks will also find the content helpful. |
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