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Entropy 2014, 16(2), 990-1001; doi:10.3390/e16020990

Prediction Method for Image Coding Quality Based on Differential Information Entropy

1,* , 2
1 School of Electronic Information, Wuhan University, Wuhan 430072, China 2 The National Key Laboratory of Science & Technology on Multi-Spectral Information Processing, School of Automation, Huazhong University of Science and Technology, Wuhan 430074, China
* Author to whom correspondence should be addressed.
Received: 27 October 2013 / Revised: 19 December 2013 / Accepted: 26 January 2014 / Published: 17 February 2014
(This article belongs to the Special Issue Advances in Information Theory)
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For the requirement of quality-based image coding, an approach to predict the quality of image coding based on differential information entropy is proposed. First of all, some typical prediction approaches are introduced, and then the differential information entropy is reviewed. Taking JPEG2000 as an example, the relationship between differential information entropy and the objective assessment indicator PSNR at a fixed compression ratio is established via data fitting, and the constraint for fitting is to minimize the average error. Next, the relationship among differential information entropy, compression ratio and PSNR at various compression ratios is constructed and this relationship is used as an indicator to predict the image coding quality. Finally, the proposed approach is compared with some traditional approaches. From the experiments, it can be seen that the differential information entropy has a better linear relationship with image coding quality than that with the image activity. Therefore, the conclusion can be reached that the proposed approach is capable of predicting image coding quality at low compression ratios with small errors, and can be widely applied in a variety of real-time space image coding systems for its simplicity.
Keywords: image compression; quality prediction; differential information entropy image compression; quality prediction; differential information entropy
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Tian, X.; Li, T.; Tian, J.-W.; Li, S. Prediction Method for Image Coding Quality Based on Differential Information Entropy. Entropy 2014, 16, 990-1001.

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