Progressive visual cryptography with friendly and size invariant shares
Joint Authors
Hou, Young Chang
Quan, Zen Yu
Tsai, Chih Fong
Source
The International Arab Journal of Information Technology
Issue
Vol. 15, Issue 2 (31 Mar. 2018)10 p.
Publisher
Publication Date
2018-03-31
Country of Publication
Jordan
No. of Pages
10
Main Subjects
Information Technology and Computer Science
Abstract EN
Visual cryptography is an important data encoding method, where a secret image is encoded into n pieces of noise-like shares.
As long as there are over k shares stacked out of n shares, the secret image can be directly decoded by the human naked eye; this cannot be done if less than k shares are available.
This is called the (k, n)-threshold visual secret sharing scheme (VSS).
Progressive visual Cryptography (PVC) differs from the traditional VSS, in that the hidden image is gradually decoded by superimposing two or more shares.
As more and more shares are stacked, the outline of the hidden image becomes clearer.
In this study, we develop an image sharing method based on the theory of PVC, which utilizes meaningful non-expanded shares.
Using four elementary matrices (C0 - C3) as the building blocks, our dispatching matrices (M0 - M3) are designed to be expandable so that the contrast in both the shares and the restored image can be adjusted based on user needs.
In addition, the recovered pixels in the black region of the secret image are guaranteed to be black, which improves the display quality of the restored image.
The image content can thus be displayed more clearly than that by previous methods
American Psychological Association (APA)
Hou, Young Chang& Quan, Zen Yu& Tsai, Chih Fong. 2018. Progressive visual cryptography with friendly and size invariant shares. The International Arab Journal of Information Technology،Vol. 15, no. 2.
https://search.emarefa.net/detail/BIM-838614
Modern Language Association (MLA)
Hou, Young Chang…[et al.]. Progressive visual cryptography with friendly and size invariant shares. The International Arab Journal of Information Technology Vol. 15, no. 2 (Mar. 2018).
https://search.emarefa.net/detail/BIM-838614
American Medical Association (AMA)
Hou, Young Chang& Quan, Zen Yu& Tsai, Chih Fong. Progressive visual cryptography with friendly and size invariant shares. The International Arab Journal of Information Technology. 2018. Vol. 15, no. 2.
https://search.emarefa.net/detail/BIM-838614
Data Type
Journal Articles
Language
English
Notes
Includes appendix.
Record ID
BIM-838614