Visual secret sharing scheme: prioritizing the secret pixels with different pixel expansions to enhance the image contrast

Ching-Nung Yang; Tse-Shih Chen

doi:10.1117/1.2786149

1 September 2007 Visual secret sharing scheme: prioritizing the secret pixels with different pixel expansions to enhance the image contrast

Ching-Nung Yang, Tse-Shih Chen

Author Affiliations +

Optical Engineering, Vol. 46, Issue 9, 097005 (September 2007). https://doi.org/10.1117/1.2786149

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.

©(2007) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Ching-Nung Yang and Tse-Shih Chen "Visual secret sharing scheme: prioritizing the secret pixels with different pixel expansions to enhance the image contrast," Optical Engineering 46(9), 097005 (1 September 2007). https://doi.org/10.1117/1.2786149

Published: 1 September 2007

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