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Visual cryptography schemes with optimal pixel expansion
Theoretical Computer Science, 2006 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Alfredo De Santis +2 more
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Optimal pixel expansion of deterministic visual cryptography scheme
Multimedia Tools and Applications, 2013The optimal pixel expansion is an important parameter of deterministic visual cryptography scheme (DVCS). There are many researches have been done under different access structures and stacking operations. However, any necessary or sufficient condition has not been found about the optimal pixel expansion. In this paper, we give a necessary condition of
Zhengxin Fu, Bin Yu, Fu Zhengxin
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Graph access structures with optimal pixel expansion three
Information and Computation, 2013 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ak Nagar, Subramanian Arumugam
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An Insight into Pixel Value Ordering Prediction Based Prediction-error Expansion
IEEE Transactions on Information Forensics and Security, 2020As the core of prediction-error expansion technique, prediction method has a fundamental impact on performance of reversible data hiding. Pixel value ordering (PVO) prediction has been extensively investigated for its high accuracy. However, the correlation of pixels within block has not been fully exploited yet.
Zhanchuan Cai, Wenguang He
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Sub-pixel displacement measurement based on Taylor expansion theory
Journal of Computational Methods in Sciences and Engineering, 2021Traditional vision measurement algorithms have many shortcomings, such as complex process, multi-parameter adjustment and the integer pixel accuracy. To solve these problems, a sub-pixel displacement measurement algorithm based on Taylor expansion is proposed.
Chunli Zhu +3 more
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Minimizing Pixel Expansion in Visual Cryptographic Scheme for General Access Structures
IEEE Transactions on Circuits and Systems for Video Technology, 2015Given a secret image $S$ , a set $\mathscr {P}$ of $n$ participants and a strong access structure ( $\Gamma _{\mathrm {\mathbf {Qual}}}$ , $\Gamma _{\mathrm {\mathbf {Forb}}})$ , a visual cryptographic scheme (VCS) for general access structures (GVCS) encodes $S$ into $n$ shares of transparencies such that the ...
Shyong Jian Shyu
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Visual Secret Sharing Without Pixel Expansion
International Journal of Digital Crime and Forensics, 2015Visual Secret Sharing (VSS) is a powerful approach for protecting image sharing through unsecured computer network such as the Internet. Pixel expansion and bad image quality are the most common problems of this approach. Visual secret sharing technique is proposed for grayscale images to eliminate pixel expansion problem using image compression.
Ali Makki Sagheer, Laith Hamid Abed
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Efficient Reversible Watermarking Based on Adaptive Prediction-Error Expansion and Pixel Selection
IEEE Transactions on Image Processing, 2011Prediction-error expansion (PEE) is an important technique of reversible watermarking which can embed large payloads into digital images with low distortion. In this paper, the PEE technique is further investigated and an efficient reversible watermarking scheme is proposed, by incorporating in PEE two new strategies, namely, adaptive embedding and ...
Tieyong Zeng, Xiaolong Li
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An image expansion method by using sub-pixel information
2013 International Symposium on Intelligent Signal Processing and Communication Systems, 2013A novel scheme for digital image expansion without artifact is introduced, which utilizes sub-pixel information. The proposed method achieves accurate sub-pixel interpolation, and enlarges the original image by using convolution of Lanczos function. Thus, the resolution of the digital image is increased by the proposed interpolation. Simulation results
Keita Kobayashi +2 more
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Predictive pixel differencing expansion in data reversibility scheme
Proceedings of the 6th International Conference on Ubiquitous Information Management and Communication, 2012The differencing expansion (DE) scheme can lead to a lossless pixel after secret data exacting. However, despite achieving pixel reversibility based on concept of expanded differencing, DE scheme can cause enormous image distortion since the differencing is large.
Chi-Yao Weng +3 more
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