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988			_aSpringer_Engineering_2020
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020			_a9789811382895
024	7		_a10.1007/978-981-13-8289-5 _2doi
040			_aES-MaUEC _bspa _cES-MaUEC _dES-MaUEC
050		4	_aQA268 _b2020 EB
100	1		_aYan, Bin _eautor _9671603
245	1	0	_aImproving image quality in visual cryptography _cby Bin Yan, Yong Xiang, Guang Hua
250			_aFirst edition
264		1	_aSingapore _bSpringer Singapore _bImprint: Springer _c2020
300			_a1 recurso en línea (XVIII, 120 páginas) _b74 ilustraciones, 13 ilustraciones a color
336			_2rdacontent _aTexto _btxt
337			_2rdamedia _aelectrónico _bc
338			_2rdacarrier _arecurso electrónico _bcr
347			_atext file _bPDF
490	0		_aSignals and Communication Technology _x1860-4862
490	0		_aEngineering (Springer-11647)
505	0		_aIntroduction -- 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.
520	3		_aThis 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.
650		7	_2embne _aCriptografía _9413101
650		7	_2embne _aCodificación, Teoría de la _9666753
650		7	_2embne _9140864 _aÁlgebra
700	1		_aXiang, Yong _eautor _4aut _4http://id.loc.gov/vocabulary/relators/aut _9670284
700	1		_aHua, Guang _eautor _9677131
700	1		_aHua, Guang _eautor _4aut _4http://id.loc.gov/vocabulary/relators/aut _9677131
776	0	8	_iPrinted edition: _z9789811382888
776	0	8	_iPrinted edition: _z9789811382901
776	0	8	_iPrinted edition: _z9789811382918
856	4	0	_uhttps://go.openathens.net/redirector/universidadeuropea.es?url=https://doi.org/10.1007/978-981-13-8289-5 _zAcceso a este recurso digital (usuarios Universidad Europea de Madrid)
942			_2lcc _cLE
998			_dz _feng _ggw _h0 _b12/2019 _eel _zSI