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Optical Engineering

Visual secret sharing scheme: prioritizing the secret pixels with different pixel expansions to enhance the image contrast
Author(s): Ching-Nung Yang; Tse-Shih Chen
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Paper Abstract

A visual secret sharing (VSS) scheme is a secret image sharing scheme that divides a secret pixel into several subpixels (the number of subpixels is called the pixel expansion). The secret image encrypted by the VSS technique can be visually revealed without additional computations. However, the contrast of recovered image is poor and thus the VSS framework is always a research issue and does not have practical applications. We introduce a new framework that prioritizes the pixels with different pixel expansions to enhance the image contrast for practical use. Also, by integrating the optical character recognition with the proposed VSS scheme we show a new visual authentication scheme.

Paper Details

Date Published: 1 September 2007
PDF: 19 pages
Opt. Eng. 46(9) 097005 doi: 10.1117/1.2786149
Published in: Optical Engineering Volume 46, Issue 9
Show Author Affiliations
Ching-Nung Yang, National Dong Hwa Univ. (Taiwan)
Tse-Shih Chen, National Dong Hwa Univ. (Taiwan)


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