Format

Send to:

Choose Destination
See comment in PubMed Commons below
IEEE Trans Image Process. 2013 Oct;22(10):3830-41. doi: 10.1109/TIP.2013.2262290. Epub 2013 May 13.

Image size invariant visual cryptography for general access structures subject to display quality constraints.

Author information

  • 1Department of Computer Science and Information Engineering, Ming Chuan University, Taoyuan, Taiwan. khlee@mail.mcu.edu.tw

Abstract

Conventional visual cryptography (VC) suffers from a pixel-expansion problem, or an uncontrollable display quality problem for recovered images, and lacks a general approach to construct visual secret sharing schemes for general access structures. We propose a general and systematic approach to address these issues without sophisticated codebook design. This approach can be used for binary secret images in non-computer-aided decryption environments. To avoid pixel expansion, we design a set of column vectors to encrypt secret pixels rather than using the conventional VC-based approach. We begin by formulating a mathematic model for the VC construction problem to find the column vectors for the optimal VC construction, after which we develop a simulated-annealing-based algorithm to solve the problem. The experimental results show that the display quality of the recovered image is superior to that of previous papers.

PMID:
23674454
[PubMed]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for IEEE Engineering in Medicine and Biology Society
    Loading ...
    Write to the Help Desk