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Visibility range estimation method and system

  • US 7,970,178 B2
  • Filed: 12/21/2007
  • Issued: 06/28/2011
  • Est. Priority Date: 12/21/2007
  • Status: Expired due to Fees
First Claim
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1. A method for determining a visibility range of an area, comprising:

  • obtaining at least one digital image of at least a portion of the area;

    selecting a first region of interest from the at least one digital image and calculating a visibility attenuation factor based on a contrast map and a distance map of the first region of interest;

    selecting a second region of interest from the at least one digital image and selecting pixels in the second region of interest based on the visibility attenuation factor; and

    finding a pixel representing the longest distance and having a contrast around or above 5%,wherein the visibility range is determined based on the distance of the pixel.

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