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Open AccessArticle

A Robust Image Tampering Detection Method Based on Maximum Entropy Criteria

by Bo Zhao 1, Guihe Qin 1,2 and Pingping Liu 1,2,*
College of Computer Science and Technology, Jilin University, Changchun 130012, China
Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education, Jilin University, Changchun 130012, China
Author to whom correspondence should be addressed.
Academic Editors: Umberto Lucia and Giuseppe Grazzini
Entropy 2015, 17(12), 7948-7966;
Received: 12 August 2015 / Revised: 6 November 2015 / Accepted: 18 November 2015 / Published: 1 December 2015
This paper proposes a novel image watermarking method based on local energy and maximum entropy aiming to improve the robustness. First, the image feature distribution is extracted by employing the local energy model and then it is transformed as a digital watermark by employing a Discrete Cosine Transform (DCT). An offset image is thus obtained according to the difference between the extracted digital watermarking and the feature distribution of the watermarked image. The entropy of the pixel value distribution is computed first. The Lorenz curve is used to measure the polarization degree of the pixel value distribution. In the pixel location distribution flow, the maximum entropy criteria is applied in segmenting the offset image into potentially tampered regions and unchanged regions. All-connected graph and 2-D Gaussian probability are utilized to obtain the probability distribution of the pixel location. Finally, the factitious tampering probability value of a pending detected image is computed through combining the weighting factors of pixel value and pixel location distribution. Experimental results show that the proposed method is more robust against the commonly used image processing operations, such as Gaussian noise, impulse noise, etc. Simultaneously, the proposed method achieves high sensitivity against factitious tampering. View Full-Text
Keywords: image tampering detection; watermarking; maximum entropy; offset image image tampering detection; watermarking; maximum entropy; offset image
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Zhao, B.; Qin, G.; Liu, P. A Robust Image Tampering Detection Method Based on Maximum Entropy Criteria. Entropy 2015, 17, 7948-7966.

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