Results 261 to 270 of about 2,118,323 (299)

Image Hatching for Visual Cryptography

2009 13th International Machine Vision and Image Processing Conference, 2009
Image hatching (or non-photorealistic line-art) is a technique widely applied in the printing or engraving of currency. Diverse styles of brush strokes have previously been adopted for different areas of an image to create textures and shading. Because there is no continuous tone within these types of images, we propose a multi-level scheme, which uses
Jonathan Weir, Wei Qi Yan 0001
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Visual cryptography via halftoning

SPIE Proceedings, 2003
Visual cryptography encodes a secret binary image SI into n shares of random binary patterns. The secret image can be visually decoded by superimposing a qualified subset of shares, but no secret information can be obtained from the superposition of a forbidden subset. Such a scheme is mathematically secure, however, the binary patterns of the n shares
Gonzalo R. Arce, Zhi Zhou, Giovanni Di Crescenzo   +2 more
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Collaborative Visual Cryptography Schemes

IEEE Transactions on Circuits and Systems for Video Technology, 2018
A ( $k,n$ )-conventional visual cryptography (VC) scheme is designed to share one secret and each participant takes one share. When some common participants are involved in multiple VC schemes for multiple secrets, each needs to take multiple shares. This procedure needs more shares, which is inconvenient.
Xingxing Jia, Daoshun Wang, Daxin Nie, Chaoyang Zhang   +3 more
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Plane Transform Visual Cryptography

2011
Plane transformation visual cryptography takes a unique approach to some of the current shortcomings of current visual cryptography techniques. Typically, the direction and placement of the encrypted shares is critical when attempting to recover the secret. Many schemes are highly dependant on this stacking order.
Jonathan Weir, WeiQi Yan 0001
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A Weighted Threshold Visual Cryptography

2019
Over the past years, a visual secret sharing scheme gave each share the same ability to reconstruct the secret image. That means each participant had the same significance to reveal the secret. However, it is not realistic in real world for some applications.
Tai-Yuan Tu, Tzung-Her Chen, Ji-Min Yang, Chih-Hung Wang   +3 more
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Visual Cryptography in reversible style

Third International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIH-MSP 2007), 2007
We proposed in this paper a brand new type of visual cryptography (VC), namely, the VC in reversible style. For any two given secret images, two corresponding transparencies S1 and S2, also known as shares, can be produced. Both transparencies look noisy.
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Joint visual cryptography and watermarking

2004 IEEE International Conference on Multimedia and Expo (ICME) (IEEE Cat. No.04TH8763), 2005
In this paper, we discuss how to use the watermarking technique for visual cryptography. Both halftone watermarking and visual cryptography involve a hidden secret image. However, their concepts are different. For visual cryptography, a set of shared binary images is used to protect the content of the hidden image. The hidden image can only be revealed
Ming Sun Fu, Oscar C. Au
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A Verifiable Visual Cryptography Scheme

2011 Fifth International Conference on Genetic and Evolutionary Computing, 2011
Visual cryptography (VC) is widely used in secret communications without any computations. The past schemes rarely focused on the authentication issue before reconstructing the decrypted image. This paper provided an authentication mechanism for VC and the experiments confirmed its feasibility.
Yi-Hui Chen, Chi-Wei Lan, Chiao-Chih Huang   +2 more
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Visual cryptography on postage stamps

ACM SIGCAS Computers and Society, 2015
Some national post offices offer postage stamps showing an image chosen by the customer, but in at least one case, an image was refused for political reasons. Visual cryptography was used to get the post office to produce two stamps showing images which are closely related to the rejected image.
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Visual Cryptography Scheme with Autostereogram

2015
Visual cryptography scheme (VCS) is an encryption technique that utilizes the human visual system in recovering of the secret image and does not require any cryptographic computation. Autostereogram is a single two dimensional image which becomes a virtual three dimensional image when viewed with proper eye convergence or divergence.
Daoshun Wang, Feng Yi, Ching-Nung Yang
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