[1]WANG Keping,YANG Yi,FEI Shumin.Review of hazy image sharpening methods[J].CAAI Transactions on Intelligent Systems,2023,18(2):217-230.[doi:10.11992/tis.202110029]
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CAAI Transactions on Intelligent Systems[ISSN 1673-4785/CN 23-1538/TP] Volume:
18
Number of periods:
2023 2
Page number:
217-230
Column:
综述
Public date:
2023-05-05
- Title:
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Review of hazy image sharpening methods
- Author(s):
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WANG Keping1; YANG Yi1; FEI Shumin2
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1. School of Electrical Engineering and Automation, He’nan Polytechnic University, Jiaozuo 454003;
2. School of Automation, Southeast University, Nanjing 210096, China
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- Keywords:
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image sharpening; image dehazing; ill-posed problem; image degradation; atmospheric scattering model; deep learning; model-free; uneven hazy image
- CLC:
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TP391.41
- DOI:
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10.11992/tis.202110029
- Abstract:
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Hazy images not only induce visual effects but also easily introduce difficulties to subsequent high-level tasks, such as image recognition and understanding. Image dehazing is a typical ill-posed problem, and accurately modeling the imaging process is difficult. Therefore, eliminating the haze in the image faces enormous challenges. Researchers have proposed numerous methods to overcome the hazy image degradation caused by haze. First, this paper summarizes the image dehazing methods to understand and organize them. Whether the haze degradation process is supported by the model, the clarity algorithm is generally divided into a Retinex-based model, atmospheric scattering model defogging algorithm, and model-free image dehazing algorithm. The atmospheric scattering model is the typical model-based dehazing. The imaging mechanism of the model is comprehensively analyzed. However, addressing the non-uniform hazy image problem is difficult because the atmospheric scattering model is easily restricted to an assumption that the atmospheric concentration is distributed uniformly. The deep learning-based model-free dehazing algorithm not only deals with the non-uniform hazy image but also gains a considerable improvement in dehazing performance. Second, this paper summarizes the commonly used image dehazing data sets in recent years and compares the data sets from multiple dimensions, such as the scope of application, scale, and expandability. Moreover, the influence of a synthetic hazy data set and the data set of images shot in reality on the image dehazing algorithm is qualitatively and quantitatively discussed in accordance with the formation mode of hazy images.