Next Article in Journal
An Improved A* Algorithm Based on Hesitant Fuzzy Set Theory for Multi-Criteria Arctic Route Planning
Next Article in Special Issue
Reusing Source Task Knowledge via Transfer Approximator in Reinforcement Transfer Learning
Previous Article in Journal
On the Electric-Magnetic Duality Symmetry: Quantum Anomaly, Optical Helicity, and Particle Creation
Previous Article in Special Issue
The Augmented Approach towards Equilibrated Nexus Era into the Wireless Rechargeable Sensor Network
Article Menu
Issue 12 (December) cover image

Export Article

Open AccessArticle
Symmetry 2018, 10(12), 764; https://doi.org/10.3390/sym10120764

Pixel-Value-Ordering based Reversible Information Hiding Scheme with Self-Adaptive Threshold Strategy

Department of Information Management, Chaoyang University of Technology, Taichung 41349, Taiwan
*
Author to whom correspondence should be addressed.
Received: 1 December 2018 / Revised: 11 December 2018 / Accepted: 12 December 2018 / Published: 17 December 2018
(This article belongs to the Special Issue Information Technology and Its Applications 2018)
Full-Text   |   PDF [8853 KB, uploaded 19 December 2018]   |  

Abstract

Pixel value ordering (PVO) hiding scheme is a kind of data embedding technique that hides a secret message in the difference of the largest and second largest pixels of a block. After that, the scholars improved PVO scheme by using a threshold to determine whether the block is smooth or complex. Only a smooth block can be used to hide information. The researchers analyzed all the possible thresholds to find the proper one for hiding secret message. However, it is time consuming. Some researchers decomposing the smooth block into four smaller blocks for hiding more messages to increase image quality. However, the complexity of the block is more important than block size. Hence, this study proposes an ameliorated method. The proposed scheme analyzes the variation of the region so as to judge the complexity of the block and applies quantification strategy to quantified the pixel for making sure the pixel is reversible. It adopts an adaptive threshold generation mechanism to find the proper threshold for different images. The results show that the image quality of the proposed scheme is higher than that of the other methods. The proposed scheme can also let the user adjust the hiding rate to achieve higher image quality or hiding capacity. View Full-Text
Keywords: reversible information hiding; pixel value ordering; PVO; quantification strategy reversible information hiding; pixel value ordering; PVO; quantification strategy
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Lu, T.-C.; Tseng, C.-Y.; Huang, S.-W.; Nhan Vo., T. Pixel-Value-Ordering based Reversible Information Hiding Scheme with Self-Adaptive Threshold Strategy. Symmetry 2018, 10, 764.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Symmetry EISSN 2073-8994 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top