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METHOD AND APPARATUS FOR ESTIMATING POINT SPREAD FUNCTION

  • US 20110122266A1
  • Filed: 11/17/2010
  • Published: 05/26/2011
  • Est. Priority Date: 11/20/2009
  • Status: Active Grant
First Claim
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1. A method of estimating a point spread function (PSF), the method comprising:

  • estimating a global motion between a short-exposure image and a long-exposure image that are continuously captured using different exposure times, and compensating for the global motion;

    calculating a first resultant image by applying a band pass filter to the short-exposure image;

    calculating a second resultant image by applying the band pass filter to the long-exposure image;

    converting the first resultant image and the second resultant image into n-level images, where n is an odd natural number greater than or equal to 3, by deducing a first n-level resultant image and a second n-level resultant image from the first resultant image and the second resultant image, respectively;

    correlating the first n-level resultant image and the second n-level resultant image, and calculating a correlation map; and

    deducing the PSF from the correlation map.

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