Results 221 to 230 of about 1,949,204 (276)

A Cheat-Prevention Visual Secret Sharing Scheme with Minimum Pixel Expansion

International Workshop on Digital Watermarking, 2014
A visual secret sharing (VSS) scheme with minimum pixel expansion is proposed to prevent malicious participants from deceiving an honest participant. A VSS scheme encrypts a secret image into pieces referred to as shares where each participant keeps a share so that stacking sufficient number of shares recovers the secret image.
Shenchuan Liu, Masaaki Fujiyoshi, Hitoshi Kiya   +2 more
openaire   +2 more sources

Public key based bidirectional shadow image authentication without pixel expansion in image secret sharing

Frontiers of Information Technology & Electronic Engineering, 2023
图像秘密分享（ISS）的研究越来越多，主要因为数字图像的重要性以及ISS可以广泛应用于云分布式存储和多方安全计算。影子图像认证日渐重要，通常包括影子图像真实性检测和识别。然而，传统处理者参与的方法主要是单向验证，即在解码阶段验证影子图像，存在像素扩张或额外辅助信息等不足。因此，分发（编码）阶段的影子图像认证对参与者来说也很重要。本文引入一种基于公钥的双向影子图像认证方法，实现(k, n)门限且无像素扩张。当处理者将每个影子图像分发给相应参与者时，参与者可以用其私钥验证接收到的影子图像。在解码阶段 ...
Xuehu Yan, Longlong Li, Jia Chen, Lei Sun   +3 more
semanticscholar   +1 more source

Reversible Data Hiding using Pixel-Value-Ordering and Difference Expansion in Digital Images

2022 IEEE International Conference on Communication, Networks and Satellite (COMNETSAT), 2022
Pixel value ordering (PVO) and difference expansion (DE) are promising methods for digital image steganography. PVO is a steganographic method of digital images that deals with pixel values sorting before the data embedding.
Ntivuguruzwa Jean de La Croix, C. Islamy, T. Ahmad   +2 more
semanticscholar   +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   +2 more sources

Sub-pixel displacement measurement based on Taylor expansion theory

Journal of Computational Methods in Sciences and Engineering, 2021
Traditional 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.
Zhu, Chunli, Lei, Xiujun, Guo, Jie, Shen, Yuan   +3 more
openaire   +1 more source

Predictive pixel differencing expansion in data reversibility scheme

Proceedings of the 6th International Conference on Ubiquitous Information Management and Communication, 2012
The 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, Chun-I Fan, Chin-Feng Lee, Shiu-Jeng Wang   +3 more
openaire   +1 more source

Pixel expansion-free grey-scale image sharing method

The Imaging Science Journal, 2013
In recent years, many visual secret sharing technologies have been proposed to protect the security of secret images (black and white, grey scale or colour images). In 2005, Lukac and Plataniotis used the concept of the Naor–Shamir method to propose a visual secret sharing technology for sharing secret grey-scale images based on bit-plane decomposition.
C-L Liu, K-P Wang, D-C Lou
openaire   +1 more source

Reversible Data Hiding Based on Three-Circular-Pixel Difference Expansion

Fundamenta Informaticae, 2009
This paper proposes a reversible data hiding scheme based on three-circular-pixel (TCP) difference expansion. To embed a message in an image, the image is divided into three-pixel blocks, each of which is, then, transformed into a TCP block with two differences.
Lin, Ching-Chiuan, Yang, Shun-Ping, Hsueh, Nien-Lin   +2 more
openaire   +1 more source

Optimum Pixel Expansions for Threshold Visual Secret Sharing Schemes

IEEE Transactions on Information Forensics and Security, 2011
The optimal pixel expansion of an (n, n) visual cryptographic scheme (VCS) was proven as 2n-1 in 1995; and that of a (2, n)-VCS was proposed in 2002. Yet, most existing best pixel expansions of (k, n)-VCSs for k ≥ 3 have not been improved since 1996. Whether they are already optimal, and if not how to find the optimums have never been explored. In this
null Shyong Jian Shyu, null Ming Chiang Chen   +1 more
openaire   +1 more source

An image expansion method by using sub-pixel information

2013 International Symposium on Intelligent Signal Processing and Communication Systems, 2013
A 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, Hiroyuki Tsuji, Tomoaki Kimura   +2 more
openaire   +1 more source