Design of visual cryptographic methods with smoothlooking decoded images of invariant size for grey-level images

doi:10.1179/174313107X165290

淡江大學機構典藏 > 商管學院 > 資訊管理學系暨研究所 > 期刊論文 > Item 987654321/21052

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/21052

题名:	Design of visual cryptographic methods with smoothlooking decoded images of invariant size for grey-level images
作者:	Tu, S.-F.;Hou, Young-Chang
贡献者:	淡江大學資訊管理學系
关键词:	halftoning;VISUAL CRYPTOGRAPHY;VISUAL SECRET-SHARING SCHEME
日期:	2007-06-01
上传时间:	2009-11-30 13:12:11 (UTC+8)
出版者:	Leeds: Maney Publishing
摘要:	Most visual secret sharing (VSS) schemes need to encrypt a pixel of the secret image into m subpixels on the share; obviously, the shares are enlarged and so are the stacked images. A handful of studies try to solve the problem of pixel expansion, but little information is available on improving the visual effect of the stacked image. In addition, most of them do not mention how to deal with grey-level images. Since the secret is decoded by the human eye, the visual effect of the stacked image is an important issue in the study of the VSS scheme. This paper proposes two visual cryptographic methods to solve the problem of pixel expansion and to improve the visual effect of the stacked image at the same time. Unlike in previous studies, multiple pixels are simultaneously encoded each time. With the help of halftoning, the methods can be applied to encoding grey-level images. The experimental results show that these methods have a better visual effect on the stacked image compared with other researchers' methods. The methods are based on two basis matrices and hence can satisfy the security and contrast conditions required by the VSS scheme.
關聯:	Imaging Science Journal 55(2), pp.90-101
DOI:	10.1179/174313107X165290
显示于类别:	[資訊管理學系暨研究所] 期刊論文

文件中的档案:

档案	描述	大小	格式	浏览次数
		0Kb	Unknown	439	检视/开启
index.html		0Kb	HTML	252	检视/开启

在機構典藏中所有的数据项都受到原著作权保护.

TAIR相关文章

数据加载中.....