Aspect ratio invariant visual cryptography by image filtering and resizing

In visual cryptographic scheme (VCS), each secret pixel is expanded to m subpixels in shadow images to encrypt a secret image. Apparently, we should put these m subpixels as a rectangle such that the blocks can be arranged compactly with each other. However, if the aspect ratio is viewed as importan...

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Veröffentlicht in:	Personal and ubiquitous computing 2013-06, Vol.17 (5), p.843-850
Hauptverfasser:	Yang, Ching-Nung, Chen, Pin-Wei, Shih, Hsiang-Wen, Kim, Cheonshik
Format:	Artikel
Sprache:	eng
Schlagworte:	Aspect ratio Computer engineering Computer Science Cryptography Filtering Filtration Invariants Mobile Computing Original Article Personal Computing Shadows User Interfaces and Human Computer Interaction Visual
Online-Zugang:	Volltext
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