Distortion-free secret image sharing method with two meaningful shadows

Ching-Chun Chang; Yanjun Liu; Hsiao-Ling Wu

Distortion-free secret image sharing method with two meaningful shadows

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Author(s): Ching-Chun Chang ¹ ; Yanjun Liu ² ; Hsiao-Ling Wu ²
- Affiliations: 1: Department of Computer Science, University of Warwick, Coventry CV4 7AL, UK ;
  2: Department of Information Engineering and Computer Science, Feng Chia University, Taichung 40724, Taiwan
Source: Volume 10, Issue 8, August 2016, p. 590 – 597
DOI: 10.1049/iet-ipr.2015.0568 , Print ISSN 1751-9659, Online ISSN 1751-9667

Received 07/09/2015, Accepted 05/03/2016, Revised 25/01/2016, Published 01/08/2016

In this study, the authors propose a novel (2, 2) secret image sharing scheme in which a control parameter ω is used to change the payload easily. Since the modification of the original cover pixel values can be limited within a small range according to the value of ω, the shadow images can achieve excellent visual quality. In the extracting process, the secret image and the cover image can be reconstructed correctly. Experimental results showed that the authors’ proposed scheme can enhance the embedding rate significantly, up to 3 bpp if ω is set to 6. In addition, the peak signal-to-noise ratio values of the shadow images are still satisfactory when the embedding rate approaches a very high value. Comparisons demonstrated that their proposed scheme outperforms other schemes that have been developed recently in terms of the embedding rate and the visual quality.

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Distortion-free secret image sharing method with two meaningful shadows

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