Journal
OPTICS AND LASERS IN ENGINEERING
Volume 114, Issue -, Pages 76-82Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.optlaseng.2018.10.014
Keywords
Image encryption and hiding; Ghost imaging; Digital image processing
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Funding
- National Natural Science Foundation of China (NSFC) [61775121, 61307003, 61405122, 11574311]
- Key R&D Program of Shandong Province [2018GGX101002]
- Natural Science Foundation of Shandong Province [ZR2016FM03]
- Fundamental Research Funds of Shandong University [2015GN031]
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An optical image watermarking method based on singular value decomposition ghost imaging (SVDGI) and a blind watermarking algorithm is proposed. The watermark image is first encrypted by an SVDGI system, then the encrypted watermark is embedded in the host image with the help of the watermark algorithm, which uses the block discrete cosine transform (DCT) and integer lifting wavelet transform (LWT). The proposed watermarking algorithm has good imperceptibility and robustness, and no original host image is needed when extracting the watermark. SVDGI provides a new reconstruction method in ghost imaging (GI) by modifying the measurement matrix with the help of singular value decomposition, which carries out the reconstruction process in less time and at higher quality. The measurement matrix composes a secret key, and only with this key can authorized users decrypt and reconstruct the original watermark image. Both optical experiments and numerical simulations validate the feasibility of the proposed method.
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