Computerized correction of numeric data

Details Computerized correction of numeric data Computerized correction of numeric data

1996-02-29

1999-02-16

Mai, Tan V.

Boots, shoes, and leggings

G06F 1100

Patent

active

058727302

ABSTRACT:
Apparatus and a method is described for correcting a set of stored digital representations of numbers having an estimable error probability distribution where there is at least one known arithmetic relation between the numbers which can be expressed as a sum, difference or equality. The invention finds particular, but not exclusive, application to the correction of optical character recognition (OCR) results. Hidden Markov Model optimization logic is employed for finding the most likely path through a set of states in accordance with probability functions recording the likelihood of transitions between the states giving rise to a set of event-related observations. The system is arranged so that the states are possible accumulated totals generated by adding or subtracting ones of the numbers to or from an initial accumulated total, addition or subtraction of the numbers to or from an accumulated total or equality of an accumulated total with the numbers are the events causing transitions from state to state, the digital representations are the event-related observations, and the error probability distributions are the probability functions, the apparatus comprising means to correct the digital representations in accordance with events giving rise to the most likely path through the states.

REFERENCES:
patent: 5276741 (1994-01-01), Aragon
patent: 5608841 (1997-03-01), Tsuboka
patent: 5617486 (1997-04-01), Chow et al.
patent: 5636291 (1997-06-01), Bellegarda et al.
patent: 5644652 (1997-07-01), Bellegarda et al.

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