Use of correlation histograms for improved glyph decoding
AssigneeXerox Corporation
InventorsRichard G. Stearns, W. Glen Petrie, L. Noah Flores, David L. Hecht, David A. Jared
Life of this patent
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AssigneeXerox Corporation
InventorsRichard G. Stearns, W. Glen Petrie, L. Noah Flores, David L. Hecht, David A. Jared
Estimating the term…
A method of decoding a plurality of glyphs comprising the steps of scanning a group of glyphs to form image data for expected glyph locations, assigning for each location a first value indicative of the likelihood that location contains a glyph in a first state, assigning for each location a second value indicative of the likelihood that location contains a glyph in a second state, determining the difference between the first and second values for each potential glyph location, establishing a distribution analysis of the determined differences and using that distribution analysis at least in part to control decoding of the plurality of glyphs.
A method of decoding a plurality of glyphs comprising the steps of:
In a method for decoding a bitmap image space representation of a self-clocking glyph shape code composed of glyphs having shapes that encode digital values, the glyphs being spatially distributed in locations in the bitmap image space in substantial accordance with a spatial formatting rule, the decoding method including a filtering step for filtering the bitmap image space representation of glyphs using a plurality of correlation filters, each correlation filter being relatively strongly matched to one of the shapes, a digital value being assigned to a glyph shape based on glyph-by-glyph evaluation of correlation values produced by the filtering step when a correlation value exceeds a correlation threshold, the improvement comprising:
Dependencies are inferred from the claim text.