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Methods and systems for background color extrapolation

  • US 8,014,596 B2
  • Filed: 10/31/2007
  • Issued: 09/06/2011
  • Est. Priority Date: 10/30/2007
  • Status: Active Grant
First Claim
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1. A method for determining a background color at a pixel of interest in a digital image, said method comprising:

  • in an image-processing system, determining a pixel of interest in a digital image, wherein said pixel of interest is part of a first scan line with an associated first scan direction in said digital image;

    in said image-processing system, receiving a color value for said pixel of interest;

    in said image-processing system, receiving a control signal associated with said pixel of interest;

    in said image-processing system, receiving a first background color estimate, wherein said first background color estimate is associated with said first scan line;

    in said image-processing system, receiving a previous background color estimate, wherein said previous background color estimate is associated with a previous scan line in said digital image;

    in said image-processing system, calculating a first color difference between said color value for said pixel of interest and said first background color estimate;

    in said image-processing system, calculating a second color difference between said color value for said pixel of interest and said previous background color estimate; and

    in said image-processing system, determining a first-scan background color estimate for said pixel of interest based on said control signal, said first color difference and said second color difference.

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