文章基本信息

标题：Impact of Error Filters on Shares in Halftone Visual Cryptography
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作者：Sunil Agrawal ; Anshul Sharma
期刊名称：Computer Science & Information Technology
电子版ISSN：2231-5403
出版年度：2012
卷号：2
期号：2
页码：139-148
DOI：10.5121/csit.2012.2215
出版社：Academy & Industry Research Collaboration Center (AIRCC)
摘要：Visual cryptography encodes a secret binary image (SI) into shares of random binary patterns. If the shares are xeroxed onto transparencies, the secret image can be visually decoded by superimposing a qualified subset of transparencies, but no secret information can be obtained from the superposition of a forbidden subset. The binary patterns of the shares, however, have no visual meaning and hinder the objectives of visu al cryptography. Halftone visual cryptography encodes a secret binary image into n halftone shares (images) carrying significant visual information. When secrecy is important factor rather than the quality of recovered image the shares must be of better visual quality. Different filters such as Flo yd-Steinberg, Jarvis, Stuki, Burkes, Sierra, and Stevenson's-Arce are used and their impact on visual quality of shares is seen. The simulation shows that error filters used in error diffusion lays a great impact on the visual quality of the shares.
关键词：Visual cryptography; error diffusion; halftone visual cryptography; secret sharing;.