TIIS (한국인터넷정보학회)
Current Result Document :
| 한글제목(Korean Title) |
Improved Contrast for Threshold Random-grid-based Visual Cryptography |
| 영문제목(English Title) |
Improved Contrast for Threshold Random-grid-based Visual Cryptography |
| 저자(Author) |
Hao Hu
Gang Shen
Zhengxin Fu
Bin Yu
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| 원문수록처(Citation) |
VOL 12 NO. 07 PP. 3401 ~ 3420 (2018. 07) |
한글내용
(Korean Abstract) |
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영문내용
(English Abstract) |
Pixel expansion and contrast are two major performance parameters for visual cryptography scheme (VCS), which is a type of secret image sharing. Random Grid (RG) is an alternative approach to solve the pixel expansion problem. Chen and Tsao proposed the first (k, n) RG-based VCS, and then Guo et al., Wu et al., Shyu, and Yan et al. significantly improved the contrast in recent years. However, the investigations on improving the contrast of threshold RG-based VCS are not sufficient. In this paper, we develop a contrast-improved algorithm for (k, n) RG-based VCS. Theoretical analysis and experimental results demonstrate that the proposed algorithm outperformers the previous threshold algorithms with better visual quality and a higher accuracy of contrast.
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| 키워드(Keyword) |
Secret image sharing
visual cryptography
random grid
threshold
contrast
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| 파일첨부 |
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