Image defogging algorithm based on guided filtering and adaptive tolerance

Xianli JIN; Wei ZHANG; Linfeng LIU

doi:10.11959/j.issn.1000-436x.2020078

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Image defogging algorithm based on guided filtering and adaptive tolerance

Papers | 更新时间：2024-06-05

- Image defogging algorithm based on guided filtering and adaptive tolerance
- Journal on Communications Vol. 41, Issue 5, Pages: 27-36(2020)
- 作者机构：
  
  南京邮电大学计算机学院，江苏南京 210023
- 作者简介：
- 基金信息：
  
  The National Natural Science Foundation of China(61872191);Six Talents Peak Project of Jiangsu Province(2019-XYDXX-247)
- DOI：10.11959/j.issn.1000-436x.2020078
  CLC： TP391
- Online First：2020-05，
  
  Published：25 May 2020
- 稿件说明：
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Xianli JIN, Wei ZHANG, Linfeng LIU. Image defogging algorithm based on guided filtering and adaptive tolerance[J]. Journal on Communications, 2020, 41(5): 27-36.
DOI：

Xianli JIN, Wei ZHANG, Linfeng LIU. Image defogging algorithm based on guided filtering and adaptive tolerance[J]. Journal on Communications, 2020, 41(5): 27-36. DOI： 10.11959/j.issn.1000-436x.2020078.

摘要

针对暗通道算法在对天空区域去雾存在失真的问题，提出一种基于引导滤波和自适应容差机制的图像去雾算法。首先，计算出不同尺寸窗口的拟合透射率图；然后，通过引导滤波对透射率进行细化处理，再利用自适应容差机制对天空区域的透射率进行修正；最后，将复原图像从RGB空间转换到HSV空间，对图像的亮度和对比度进行色彩补偿。实验结果表明，所提算法复原图像具有较高的清晰度，在处理天空等明亮区域时也能取得较好的去雾效果。

Abstract

Aiming at the problem of distortion of dark channel algorithm in defogging the sky region

an improved image defogging algorithm based on the guided filtering and adaptive tolerance mechanism was proposed.Firstly

the fitted transmissivity graphs were calculated for the windows with different sizes.Then

the transmissivity was further refined by the guided filtering technique.After that

the transmissivity in sky area was revised by an adaptive tolerance mechanism.Finally

the restored image was converted from RGB space to HSV space

and thus the brightness and contrast of the images could be color compensated.Experimental results show that the proposed algorithm restores the images effectively and obtain preferable defogging results with regard to the processing of bright areas such as the sky areas.

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references

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Multi-scale guided filtering integrated with superpixel and patch shift

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