计算机工程

• 图形图像处理 • 上一篇    下一篇

单幅图像梯度域实时去雾算法

潘磊1,2,袁小珂1,周欢2   

  1. (1.中国民用航空飞行学院 计算机学院,四川 广汉 618307; 2.四川大学 计算机学院,成都 610065)
  • 收稿日期:2016-01-04 出版日期:2016-10-15 发布日期:2016-10-15
  • 作者简介:潘磊(1982—),男,讲师、博士研究生,主研方向为图像处理、计算机视觉;袁小珂,副教授;周欢,博士研究生。
  • 基金项目:
    四川省教育厅科研基金资助项目(16ZB0032);中国民航总局应用开发科技基金资助项目(MHRD20140212);中国民用航空飞行学院基金资助面上项目(J2012-40)。

Algorithm of Real-time Defogging in Gradient Domain for Single Image

PAN Lei 1,2,YUAN Xiaoke 1,ZHOU Huan 2   

  1. (1.College of Computer Science,Civil Aviation Flight University of China,Guanghan,Sichuan 618307,China; 2.College of Computer Science,Sichuan University,Chengdu 610065,China)
  • Received:2016-01-04 Online:2016-10-15 Published:2016-10-15

摘要: 针对现有去雾算法实时性不足的缺陷,同时为了改善目前梯度域去雾算法易产生误差、稳定性较弱的问题,提出一种单幅图像的梯度域实时去雾算法。该算法基于大气光散射模型,根据透射率的估计值直接计算雾天图像的梯度衰减系数,并进行梯度复原。对于图像边界位置上的像素点,先在空间域上进行去雾处理,然后将处理后的像素值作为边界条件,从梯度域重建出最终的复原图像。实验结果表明,该算法能获得较好的去雾效果,且实时性较高。

关键词: 图像去雾, 图像复原, 梯度域, 暗通道先验, 实时去雾

Abstract: In view of the real-time defects of existing defogging algorithms as well as the error and insufficient stability of gradient domain defogging algorithms,a gradient domain restoration algorithm for a single haze image is put forward in this paper.Based on the atmospheric light scattering model,gradient attenuation of haze image is directly calculated in accordance with the estimated value of transmission,and then gradient domain restoration is proceeded.For the pixels in the image boundary position,defogging is carried out in the space domain.At last,taking the processed value of boundary pixel as the initial condition,the ultimate restoration image is reconstructed from gradient domain.Experimental results show that this algorithm can get good defogging effect and it has high real-time performance.

Key words: image defogging, image restoration, gradient domain, dark channel prior, real-time defogging

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