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Image distortion correction

  • US 9,177,368 B2
  • Filed: 12/17/2007
  • Issued: 11/03/2015
  • Est. Priority Date: 12/17/2007
  • Status: Active Grant
First Claim
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1. A method of reducing image distortion, said method comprising:

  • determining distortion information associated with a lens system, wherein said distortion information is associated with distortion at a plurality of focal lengths, and wherein said distortion information is further associated with color distortion;

    storing said distortion information;

    processing a captured image taken with said lens system, wherein said processing is performed with reference to said distortion information; and

    generating a corrected image comprising reduced image distortion compared to said captured image, wherein a shader of a graphics processing unit (GPU) is configured to perform said generating by calculating a corrected pixel value for each pixel in said corrected image based on a correction value for each pixel, wherein said correction value is obtained from a calibration texture, wherein said calibration texture is operable to correct a distortion introduced by said lens system, and wherein said shader is operable to be programmed by a texturing engine to use said calibration texture to output each pixel in a proper location in said corrected image.

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