Image analysis – Histogram processing – For setting a threshold
Patent
1992-03-18
1994-12-27
Moore, David K.
Image analysis
Histogram processing
For setting a threshold
382 36, 382 37, 382 39, 382 57, G06K 972
Patent
active
053772814
ABSTRACT:
Character string recognition and identification is accomplished with a combined, multi-phase top-down and bottom-up process. Characters in an applied signal are recognized with a process that employs a knowledge source which contains information both, about the basic elements in the signal and about strings of the basic elements in the signal. The knowledge source, which may be derived from a training corpus, includes word probabilities, word di-gram probabilities, statisitics that relate the likelihood of words with particular character prefixes, and rewrite suggestions and their costs. Higher level word n-grams, such as word tri-gram probabilities, can also be used. A mechanism is provided for accepting words that are not found in the knowledge base, as well as for rewrite suggestions that are not in the knowledge base.
REFERENCES:
patent: 3969700 (1976-07-01), Bollinger et al.
patent: 4058795 (1977-11-01), Balm
patent: 4654875 (1987-03-01), Srihari et al.
patent: 5133023 (1992-07-01), Bokser
patent: 5161245 (1992-11-01), Fenwick
J. J. Hull and S. N. Srihari, "Comparison of Two Contextual Post-Processing Algorithms for Text Recognition," IEEE, 1982, pp. 146-151.
J. J. Hull, S. N. Srihari and R. Choudhari, "An Integrated Algorithm for Text Recognition: Comparison with a Cascaded Algorithm," IEEE Transactions on Pattern Analysis and Machine Intelligence, vol. PAMI-5, No. 4, Jul. 1983, pp. 384-395.
S. N. Srihari, J. J. Hull and R. Choudhari, "Integrating Diverse Knowledge Sources in Text Recognition," ACM Transactions on Office Information Systems, vol. 1, No. 1, Jan. 1983, pp. 68-87.
S. N. Srihari, J. J. Hull and R. Choudhari, "Integration of bottom-up and top-down contextual knowledge in text error correction," National Computer Conference, 1982, pp. 501-508.
M. A. Jones, G. A. Story, B. W. Ballard, "Integrating Multiple Knowledge Sources in a Bayesian OCR Post-Processor," ICDAR-91 Conference Proceedings, St. Malo, France, Summer 1991, pp. 925-933.
Ballard Bruce W.
Jones Mark A.
Story Guy A.
AT&T Corp.
Brendzel Henry T.
Moore David K.
Tran Phuoc
LandOfFree
Knowledge-based character recognition does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Knowledge-based character recognition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Knowledge-based character recognition will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-924731