Method and apparatus for distinguishing bold face characters

Details Method and apparatus for distinguishing bold face characters Method and apparatus for distinguishing bold face characters

1998-02-13

2000-07-11

Mancuso, Joseph

Image analysis

Histogram processing

G06K 900

Patent

active

060884789

ABSTRACT:
A method and apparatus for classification of scanned symbols into equivalence classes as may be used for image data compression. The present invention performs run-length symbol extraction and classifies symbols based on both horizontal and vertical run length information. An equivalence class is represented by an exemplar. Feature-based classification criteria for matching an exemplar is defined by a corresponding exemplar template. The feature-based classification criteria all use quantities, which includes the stroke width of symbols, that can be readily computed from the run endpoints. Reducing the number of equivalence classes is achieved through a process called equivalence class consolidation. Equivalence class consolidation utilizes the symbol classifier to identify matched exemplars indicating equivalence classes which may be merged. For a consolidated equivalence class, the exemplar matching the most symbols is selected as the representative for the class.

REFERENCES:
patent: 5668891 (1997-09-01), Fan et al.
patent: 5778095 (1998-07-01), Davies

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