Patent Document ID: 20090110320
Application ID: 11930500
Patent Status: 0

Claim One:
1. A method for glyph detection in a digital image, said method comprising: a. 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; b. receiving a first background color estimate for said pixel of interest; c. receiving a pixel-of-interest color value for said pixel of interest; d. receiving a color value for each pixel in a first plurality of pixels in a region proximate to said pixel of interest, thereby producing a first plurality of color values; e. calculating a first color difference between said pixel-of-interest color value and said first background color estimate; f. calculating a color difference between said first background color estimate and each color value in said first plurality of color values, thereby producing a first plurality of color differences; g. determining a dynamic threshold based on said first plurality of color differences; h. comparing said dynamic threshold with said first color difference; i. labeling said pixel of interest as a glyph pixel when said comparing meets a first condition; and j. labeling said pixel of interest as a non-glyph pixel when said comparing meets a second condition.