Journal
PATTERN RECOGNITION
Volume 42, Issue 7, Pages 1582-1596Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.patcog.2008.08.023
Keywords
Image encryption; Random grid; Visual cryptogram; Visual cryptography; Visual secret sharing
Funding
- National Science Council of the Republic of China [NSC 97-2221-E-130-022-MY3]
Ask authors/readers for more resources
In this paper, we first give a formal definition to the visual cryptograms of n ( >= 2) random grids (VCRG-n) for encrypting an image. Specifically, a set of VCRG-n with respect to image P consists of n random grids printed on transparencies such that only when the n transparencies are superimposed altogether can P be recognized by human vision (without any computing device), while any group of less than n transparencies obtains no information about P. Then, we design novel VCRG-n encryption schemes for binary, gray-level and color images, validate the correctness by formal proofs and demonstrate the feasibility by computer simulations. Our schemes do not require any extra pixel expansion neither any encoding basis matrix, which are necessary and inevitable in the approaches of conventional visual cryptography. These attractive advantages make our schemes more informative in theoretical interests and much applicable in practical applications. (C) 2008 Elsevier Ltd. All rights reserved
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available