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Optical Engineering

Sharing of multiple images: economically sized and fast-decoding approach based on modulus and Boolean operations
Author(s): Kun-Yuan Chao; Ja-Chen Lin
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Paper Abstract

Secret image sharing is a popular technology to secure digital images in storage and transmission. Traditionally, the technology transforms one secret image into several images called shadows or shares. Later, when the number of collected shadows reaches a specified threshold value, the decomposed image can be reconstructed. We propose a new sharing approach to transform n secret images into n shadows. Later, after gathering all the n shadows, all the n secret images can be retrieved error-free. No information in any secret image is revealed if one shadow is absent. The total size of n generated shadows is identical to the total size of n input secret images; hence, this approach does not waste storage space. Each pixel in each secret image is reconstructed using only one Boolean, one modulus, and two mathematical operations, so it is also a fast approach for reconstructing many secret images. Comparisons are included.

Paper Details

Date Published: 1 April 2010
PDF: 10 pages
Opt. Eng. 49(4) 047007 doi: 10.1117/1.3407067
Published in: Optical Engineering Volume 49, Issue 4
Show Author Affiliations
Kun-Yuan Chao, National Chiao Tung Univ. (Taiwan)
Ja-Chen Lin, National Chiao Tung Univ. (Taiwan)

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