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A novel evaluation standard combining gini-index and variation coefficient for double plateaus histogram equalization

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Abstract

Image contrast enhancement or boosting is normally referred to as one of the most crucial tasks in image processing, and histogram equalization (HE) is one of the most pervasive methods applied to address this task. HE and its variants have been proven a simple and effective technique. However, no one consistent image quality evaluation standard has been built for them, not to say other relevant approaches. In other words, it is lack of enough attention to image quality evaluation for contrast enhancement algorithms. The authors proposed a novel evaluation standard combining Gini-index and variation coefficient. They verified the effectiveness of the proposed evaluation standard especially for double plateaus histogram equalization (DPHE) algorithm. Their experimental results showed that when H and PSNR cannot clearly describe the image quality, the proposed objective standard could provide an additional objective basis for the quality evaluation of DPHE, which may be extended to pervasive image enhancement algorithms.

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Availability of data and materials

The database source for this paper is from http://www.cvl.isy.liu.se/en/research/datasets/ltir and http://dgp.toronto.edu/~nmorris/data, and nine infrared images are chosen, as shown in Fig. 2.

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Acknowledgements

The authors would like to thank anonymous reviewers for their kind and valuable comments.

Funding

This manuscript received July 02, 2023; accepted July 28, 2023. This work was supported in part by National Science Foundation of China under Grant 61072135, 81971702, the Fundamental Research Funds for the Central Universities under Grant 2042017gf0075, 2042019gf0072, and Natural Science Foundation of Hubei Province under Grant 2017CFB721. Asterisk indicates corresponding author.

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li weiming wrote the main manuscript text. All authors reviewed the manuscript.

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Correspondence to Xianyang Jiang.

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Li, W., Jiang, X. A novel evaluation standard combining gini-index and variation coefficient for double plateaus histogram equalization. SIViP 18, 3321–3328 (2024). https://doi.org/10.1007/s11760-024-02995-8

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