Daytime And Nighttime Image Recognizing Method And Apparatus

  • US 20080159623A1
  • Filed: 12/20/2007
  • Published: 07/03/2008
  • Est. Priority Date: 12/29/2006
  • Status: Active Grant
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First Claim
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1. A daytime and nighttime image recognizing method, comprising:

  • predefining an air region and a terrestrial region for an image captured by a camera apparatus;

    inputting an image captured by the camera apparatus;

    calculating a lightness value histogram for the air region of the input image; and

    determining a lighting condition of a photo environment of the camera apparatus based on the lightness value histogram for the air region of the input image.

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