Improving Image Quality in Visual Cryptography (inbunden)
Format
Inbunden (Hardback)
Språk
Engelska
Antal sidor
120
Utgivningsdatum
2019-06-24
Upplaga
1st ed. 2020
Förlag
Springer Verlag, Singapore
Medarbetare
Xiang, Yong / Hua, Guang
Illustrationer
100 Tables, color; 13 Illustrations, color; 61 Illustrations, black and white; XVIII, 120 p. 74 illu
Dimensioner
234 x 156 x 10 mm
Vikt
377 g
Antal komponenter
1
Komponenter
1 Hardback
ISBN
9789811382888
Improving Image Quality in Visual Cryptography (inbunden)

Improving Image Quality in Visual Cryptography

Inbunden Engelska, 2019-06-24
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This book comprehensively covers the important efforts in improving the quality of images in visual cryptography (VC), with a focus on cases with gray scale images. It not only covers schemes in traditional VC and extended VC for binary secret images, but also the latest development in the analysis-by-synthesis approach. This book distinguishes itself from the existing literature in three ways. First, it not only reviews traditional VC for binary secret images, but also covers recent efforts in improving visual quality for gray scale secret images. Second, not only traditional quality measures are reviewed, but also measures that were not used for measuring perceptual quality of decrypted secret images, such as Radially Averaged Power Spectrum Density (RAPSD) and residual variance, are employed for evaluating and guiding the design of VC algorithms. Third, unlike most VC books following a mathematical formal style, this book tries to make a balance between engineering intuition and mathematical reasoning. All the targeted problems and corresponding solutions are fully motivated by practical applications and evaluated by experimental tests, while important security issues are presented as mathematical proof. Furthermore, important algorithms are summarized as pseudocodes, thus enabling the readers to reproduce the results in the book. Therefore, this book serves as a tutorial for readers with an engineering background as well as for experts in related areas to understand the basics and research frontiers in visual cryptography.
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Innehållsförteckning

Introduction.- Basic visual cryptography algorithms.- Improving the visual quality for binary secret images.- Digital Halftoning.- Improving visual quality for share images.- Improving visual quality for probabilistic and random grid schemes.- Improving visual quality for vector schemes.- Conclusion.