Hierarchy-based reversible data hiding

► We propose an algorithm for reversible data hiding with hierarchical structure. ► Proposed algorithm considers advantages from two major branches in this field. ► Simulations present better results than conventional ones. In this paper, we propose a new method for reversible data hiding by employi...

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Bibliographic Details
Published in:Expert systems with applications 2013-01, Vol.40 (1), p.34-43
Main Authors: Huang, Hsiang-Cheh, Chang, Feng-Cheng
Format: Article
Language:English
Subjects:
Acceptability
Algorithms
Applied sciences
Artificial intelligence
Capacity
Computer science
control theory
systems
Computer simulation
Decoding
Exact sciences and technology
Expert systems
Hierarchical structure
Histogram
Image quality
Memory and file management (including protection and security)
Memory organisation. Data processing
Messages
Pattern recognition. Digital image processing. Computational geometry
Quad
Reversible data hiding
Software
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Summary:► We propose an algorithm for reversible data hiding with hierarchical structure. ► Proposed algorithm considers advantages from two major branches in this field. ► Simulations present better results than conventional ones. In this paper, we propose a new method for reversible data hiding by employing the hierarchical relationships of original images. There are many parameters for accessing the performances of reversible data hiding algorithms, including the output image quality, the hiding capacity, and the overhead for decoding. Considering the ease of implementation and the little overhead needed for decoding, we employ modification of difference values between pixels by using histogram-based scheme with extensions to pyramidal structure by utilizing inherent characteristics of original images. By doing so, global and local characteristics of original images can be utilized for hiding more capacity with acceptable quality of output image. With our method, better performances can be obtained with enhanced image quality, the more embedding capacity, and comparable amount of side information for decoding. More importantly, the reversibility of our method is guaranteed, meaning that original image and hidden message can both be perfectly recovered at the decoder. Simulation results demonstrate that proposed method in this paper outperforms those in conventional algorithms.
ISSN:0957-4174
1873-6793
DOI:10.1016/j.eswa.2012.07.010