SYSTEMS AND METHODS FOR HANDWRITTEN DIGITAL PEN LEXICAL INFERENCE
First Claim
1. A method for recognizing handwriting on a paper form using a digital pen, the method comprising:
- accessing a stroke collection file comprising data corresponding to a set of pen strokes marked by a user on the paper form using the digital pen;
associating a field on the paper form with a predetermined lexical inference type;
determining a subset of pen strokes in the stroke collection file corresponding to the field;
based on the lexical inference type, dynamically updating an inference lexicon associated with the field; and
performing handwriting recognition on the subset of pen strokes based on the dynamically updated inference lexicon.
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Accused Products
Abstract
Systems and methods are provided for recognizing handwritten characters drawn on a paper form using a digital pen that records stroke coordinates corresponding to respective pen strokes. In one embodiment, a field on the paper form is assigned a lexical inference level. For example, the field may be assigned a word level, a word prefix level, and/or a word stem level. The assigned lexical inference level is used to recognize one or more stroke coordinates corresponding to pen strokes written in the field. Recognized characters are then used to create or modify an inference lexicon used to perform handwriting recognition for the entire field. In one embodiment, the inference lexicon is used for handwriting recognition in the same field on subsequently processed forms.
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Citations
23 Claims
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1. A method for recognizing handwriting on a paper form using a digital pen, the method comprising:
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accessing a stroke collection file comprising data corresponding to a set of pen strokes marked by a user on the paper form using the digital pen; associating a field on the paper form with a predetermined lexical inference type; determining a subset of pen strokes in the stroke collection file corresponding to the field; based on the lexical inference type, dynamically updating an inference lexicon associated with the field; and performing handwriting recognition on the subset of pen strokes based on the dynamically updated inference lexicon. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for recognizing handwriting, the system comprising:
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a digital pen configured to write pen strokes on a paper form and to store corresponding stroke coordinates associated with respective pen stroke locations on the paper form; and a processor configured to; associate a field on the paper form with a predetermined lexical inference type; determine that the stroke coordinates correspond to the field; based on the lexical inference type, dynamically update an inference lexicon associated with the field; and perform handwriting recognition on the pen strokes based on the dynamically updated inference lexicon. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A computer accessible medium comprising computer executable instructions for performing a method for recognizing handwriting on a paper form using a digital pen, the method comprising:
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accessing a stroke collection file comprising data corresponding to a set of pen strokes marked by a user on the paper form using the digital pen; associating a field on the paper form with a predetermined lexical inference type; determining a subset of pen strokes in the stroke collection file corresponding to the field; based on the lexical inference type, dynamically updating an inference lexicon associated with the field; and performing handwriting recognition on the subset of pen strokes based on the dynamically updated inference lexicon. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification