Haze-Removal-Using-Dark-Channel-Prior

• This project is mainly based on the work of Kaiming He who is my favorite researcher.
  

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Contents

1. Environments
2. Packages
3. Methods
4. Usage
5. Results
6. References

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Environments

 Python 3.0.0 or newer

• I do suggest you use python 3 which is both stable and widely used nowadays.
• The code also works well with python 2 since I just use numpy and matplotlib.

Packages

 numpy

 matplotlib

• The requirement to the version of these packages is not strict, because we just use the basic function.
• The tools used to read image is matplotlib which is in the order of RGB while cv2 is in the order of BGR.
• I want to remind you that even the same operator can have different meanings between matrix and array in numpy.

Methods

•  Dark Channel Prior---CVPR 2009
  

  This method was mainly put forward by Kaiming He, and then it was published at CVPR 2009 which was rated as the best paper.

•  Guided Image Filtering---ECCV 2010
  

  This method help us get a fine haze removal image in a fast way with less cost compared with matting method.

•  Matting Laplacian Matrix---CVPR 2006
  

  From paper, we can see that the matting laplacian is the inspiration of guided image filter, they are both ingenious and attractive.

Usage

• I don't want to package the code so that you can see the details, and you are welcomed to give me suggestion.
• The variables used in my code are as same as these in official papers so that you can get it easily.
• The function haze_removal() contains each step used in image de-hazing, I wrote this just for convenience.

Results

• Tiananmen Square : the original image comes from Kaiming He's paper
  
  
  

• The Forbidden City : the original image comes from Kaiming He's paper
  
  
  

• New York : the original image comes from Kaiming He's paper
  
  
  

• HongKong : the original image comes from Kaiming He's paper
  
  
  

• Airport : the original image is downloaded from internet
  
  
  

• The Street : the original image is downloaded from internet
  
  
  

• A380 is taking off : the original image is downloaded from internet
  
  
  

References

Author : Kaiming He, Jian Sun, Xiaoou Tang

•  Single Image Haze Removal Using Dark Channel Prior----CVPR 2009
  

•  Guided Image Filtering----ECCV 2010
  
  

Author : Anat Levin, Dani Lischinski, Yair Weiss

•  A Closed Form Solution to Natural Image Matting----CVPR 2006