Method and apparatus for context-aided recognition
First Claim
1. A system for enhancing the recognition of characters, comprising:
- recognition means responsive to a sequence of character patterns for producing a sequence of character codes identifying said characters with respect to a predetermined plurality of categories;
coding means coupled to said recognition means for translating a plurality of said character codes to a plurality of reduced codes corresponding to a plurality of sets of said categories, the number of said sets being substantially smaller than the number of said categories;
first storage means responsive to said reduced codes for producing a context code representing one set of said categories;
second storage means for holding a plurality of confusion codes associated with a predetermined one of said character codes, each of said confusion codes identifying one of said categories; and
gating means responsive to said context code for selecting one of said confusion codes.
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Accused Products
Abstract
A character-recognition unit or other input device provides a sequence of input characters. A questionable identification of one of the input characters is resolved by considering surrounding characters by a modified N-gram technique. The context characters are each translated into one of a small number of reduced codes each representing a subset of the alphabet to be recognized. The reduced codes are combined to produce a context code which indicates a set of categories containing the correct identification for the questionable input character. A list of confusion codes specifies a number of possibly correct identifications for one of the input characters. One of the codes in the confusion list is selected by the context code as the correct identification for the questionable character.
59 Citations
8 Claims
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1. A system for enhancing the recognition of characters, comprising:
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recognition means responsive to a sequence of character patterns for producing a sequence of character codes identifying said characters with respect to a predetermined plurality of categories; coding means coupled to said recognition means for translating a plurality of said character codes to a plurality of reduced codes corresponding to a plurality of sets of said categories, the number of said sets being substantially smaller than the number of said categories; first storage means responsive to said reduced codes for producing a context code representing one set of said categories; second storage means for holding a plurality of confusion codes associated with a predetermined one of said character codes, each of said confusion codes identifying one of said categories; and gating means responsive to said context code for selecting one of said confusion codes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification