Results 181 to 190 of about 635 (199)

Aspect ratio invariant visual secret sharing schemes with minimum pixel expansion

Pattern Recognition Letters, 2005
Visual secret sharing (VSS) scheme is a perfect secure method to hide a secret image by breaking it into shadow images and one can decode it easily by the human visual system. We use m, the pixel expansion, subpixels to represent a pixel. Suppose the secret image is a circle and m is not a square value, i.e., the aspect ratio is changed.
Ching-Nung Yang, Tse-Shih Chen
openaire   +1 more source

An Improved Aspect Ratio Invariant Visual Cryptography Scheme with Flexible Pixel Expansion

2016
In traditional visual cryptography scheme (VCS), each pixel of secret image is encrypted into m(\( \geqslant 1 \)) subpixels in the share images. Unfortunately, recovered image will be distorted when the pixel expansion is not a square number. In order to reveal the information of the secret image faithfully, aspect ratio of the recovered image should ...
Wen Wang 0008, Feng Liu 0001, WeiQi Yan 0001, Gang Shen, Teng Guo 0005   +4 more
openaire   +1 more source

Optical information hiding system with pixel-free expansion visual cryptography

Journal of Optics
Abstract We propose an optical information hiding system with pixel-free expansion visual cryptography (PEVC). In the optical concealment process, initially, a PEVC scheme is utilized to encode the secret image. This approach generates visual keys of the same size as the secret image, addressing the pixel expansion issue inherent in ...
Ruize Liu, Chengzhe Wu, Changjun Ke, Yishi Shi   +3 more
openaire   +1 more source

Recursive Visual Cryptography Using Random Basis Column Pixel Expansion

10th International Conference on Information Technology (ICIT 2007), 2007
Thomas Monoth, Babu Anto P.
openaire   +1 more source

PVO-based reversible data hiding using bit plane segmentation and pixel expansion

Journal of Information Security and Applications, 2023
Erfu Wang
exaly  

High capacity data hiding based on multi-directional pixel value differencing and decreased difference expansion

Multimedia Tools and Applications, 2021
Imon Mukherjee, Mukherjee Imon
exaly  

Threshold Schemes with Minimum Pixel Expansion

2008
openaire   +1 more source

Threshold Schemes with Minimum Pixel Expansion

2006
openaire   +1 more source

Threshold Schemes with Minimum Pixel Expansion

2012
openaire   +1 more source

Meaningful Color Image Sharing without Pixel Expansion Problem

International Journal of Advancements in Computing Technology, 2012
KaiPing Wang -, ChiangLung Liu -, DerChyuan Lou -   +2 more
openaire   +1 more source