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AUTOFOCUS TECHNIQUE UTILIZING GRADIENT HISTOGRAM DISTRIBUTION CHARACTERISTICS

  • US 20110109764A1
  • Filed: 09/24/2008
  • Published: 05/12/2011
  • Est. Priority Date: 09/24/2008
  • Status: Abandoned Application
First Claim
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1. A method for estimating if an optical assembly is focused on a scene, the method comprising the steps of:

  • capturing information for an image of the scene;

    determining an image gradient histogram distribution of at least a portion of the image;

    determining a Gaussian model gradient histogram distribution of at least a portion of the image; and

    comparing at least a portion of the image gradient histogram distribution to the Gaussian model gradient histogram distribution of the image to estimate if the image is in focus.

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