Method and system for removal of fog, mist, or haze from images and videos

  • US 9,197,789 B2
  • Filed: 02/02/2012
  • Issued: 11/24/2015
  • Est. Priority Date: 08/03/2011
  • Status: Active Grant
First Claim
Patent Images

1. A method for removing fog from images and/or videos comprising:

  • (a) carrying out a histogram equalization such that a foggy image is equalized to increase contrast;

    (b) estimating an airlight map by providing an initial airlight map A of the foggy image and/or video, the estimation is based on minimum intensity across red, green and blue channel of observed image intensity at pixel (x,y) and refining the airlight map A involving anisotropic diffusion or bilateral filtering;

    (c) restoring the foggy image based on the refined airlight map A by carrying out restoration of each color component of de-foggy image involving

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