Word or character boundary-based scratch-out gesture...

Details Word or character boundary-based scratch-out gesture... Word or character boundary-based scratch-out gesture...

2005-03-17

2009-06-23

Mariam, Daniel G (Department: 2624)

Image analysis

Pattern recognition

Unconstrained handwriting

Reexamination Certificate

active

07551779

ABSTRACT:
Described is a computer-implemented system and method that detects and differentiates scratch-out gestures from other electronic ink, e.g., entered via a pen. The system and method compare boundary-based criteria to differentiate, which eliminates the need to have a specially-shaped scratch-out pattern, instead allowing a wide variety of scratch-out styles to be detected. Criteria includes boundary-based evaluations such as whether the potential scratch-out gesture intersects previously recognized words or characters, whether the scratch-out gesture has a width that is at least a threshold percentage of the width of a word or character bounding box, whether the electronic ink extends beyond the midpoint of the bounding box, and whether at least some portion of the scratch-out gesture is above a baseline of the word or character. Scratch-out gestures entered in freeform input writing areas and boxed input writing areas are supported.

REFERENCES:
patent: 5500937 (1996-03-01), Thompson-Rohrlich
patent: 5666139 (1997-09-01), Thielens et al.
patent: 5848187 (1998-12-01), Bricklin et al.
patent: 5991441 (1999-11-01), Jourjine
patent: 2003/0182630 (2003-09-01), Saund et al.

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