A novel multi-group exploiting modification direction method based on switch map

Authors:
Xing-Tian Wang;Chin-Chen Chang;Chia-Chun Lin;Ming-Chu Li
Affiliations:
Department of Software, Dalian University of Technology, DaLian, China;Department of Information Engineering and Computer Science, Feng Chia University, Taichung City 407, Taiwan and Department of Biomedical Imaging and Radiological Science, Chinese Medical Universit ...;Department of Computer Science and Information Engineering, National Chung Cheng University, Chiayi 621, Taiwan;Department of Software, Dalian University of Technology, DaLian, China
Venue:
Signal Processing
Year:
2012

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Abstract

In this paper, we proposed a novel adjustable data hiding method. Our proposed method, which is based on exploiting modification direction (EMD) method, is called the ''multi-group exploiting modification direction'' method. In the multi-group method, we combine several pixel-groups to embed secret data according to the constructed switch map to simply avoid the conversion redundancy of the EMD method and the spatial redundancy of the section-wise strategy, as well as to efficiently increase the probability of achieving larger embedding capacity. According to the experimental results and mathematical justification, we verified that the multi-group method can achieve higher embedding payload and better visual quality of the image than the EMD method and section-wise strategy for simulated and real secret data.