Reversible Image Data Hiding with Contrast Enhancement

In this letter, a novel reversible data hiding (RDH) algorithm is proposed for digital images. Instead of trying to keep the PSNR value high, the proposed algorithm enhances the contrast of a host image to improve its visual quality. The highest two bins in the histogram are selected for data embedd...

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Bibliographic Details
Published in:IEEE signal processing letters 2015-01, Vol.22 (1), p.81-85
Main Authors: Hao-Tian Wu, Dugelay, Jean-Luc, Yun-Qing Shi
Format: Article
Language:English
Subjects:
Algorithms
Contrast enhancement
Data mining
Educational institutions
Electronic mail
histogram modification
Histograms
Image contrast
Image enhancement
Image quality
location map
Matlab
Messages
PSNR
reversible data hiding
Signal processing algorithms
Vision systems
Visual
visual quality
Visualization
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Summary:In this letter, a novel reversible data hiding (RDH) algorithm is proposed for digital images. Instead of trying to keep the PSNR value high, the proposed algorithm enhances the contrast of a host image to improve its visual quality. The highest two bins in the histogram are selected for data embedding so that histogram equalization can be performed by repeating the process. The side information is embedded along with the message bits into the host image so that the original image is completely recoverable. The proposed algorithm was implemented on two sets of images to demonstrate its efficiency. To our best knowledge, it is the first algorithm that achieves image contrast enhancement by RDH. Furthermore, the evaluation results show that the visual quality can be preserved after a considerable amount of message bits have been embedded into the contrast-enhanced images, even better than three specific MATLAB functions used for image contrast enhancement.
ISSN:1070-9908
1558-2361
DOI:10.1109/LSP.2014.2346989