Character reader

Details Character reader Character reader

1984-07-20

1986-12-16

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 30, 382 34, G06K 956

Patent

active

046303081

ABSTRACT:
In the particular embodiment of the invention described in the specification, the identity of an unknown character is determined by comparing matrices representing the unknown character with matrices representing known characters and determining the deviation beween matrices for the unknown and each known character. To obtain the matrices to be compared, a transformation chain is expressed in terms of horizontal, vertical and diagonal vectors, permitting all types of transformation chains to be used. Two-dimensional memory units having superposed shift registers are used in comparing matrices to determine minimum deviation.

REFERENCES:
patent: 3104372 (1963-09-01), Rabinow et al.
patent: 3178688 (1965-04-01), Hill et al.
patent: 3576534 (1971-04-01), Steinberger
patent: 3601802 (1971-08-01), Nakagome et al.
patent: 3618016 (1971-11-01), Steenis
patent: 3713099 (1973-01-01), Hemstreet
patent: 3846754 (1974-11-01), Oka et al.
patent: 4027284 (1977-05-01), Hoshino et al.
patent: 4110737 (1978-08-01), Fahey
patent: 4162482 (1979-07-01), Su
patent: 4183013 (1980-01-01), Agrawala et al.
patent: 4288782 (1981-09-01), Bader et al.
patent: 4371865 (1983-02-01), Moulton
patent: 4398256 (1983-08-01), Nussmeier et al.
patent: 4556985 (1985-12-01), Hongo
"Automatic Visual Sorting Method of Compressors with Stamped Marks", by A. Komura & K. Edamatsu, 1980, IEEE, pp. 245-247.
"A Fast Interval Processor", by G. A. Shippey, R. J. H. Bayley, A. S. J. Farrow, D. R. Rutovitz and J. H. Tucker, MRC Clinical and Population Cytogenetics Unit, Edinburgh, U.K., Pattern Recognition vol. 14, Nos. 1-6, pp. 345-365, (1981).
"Portable Scanner Reads Handwritten Letters and Figures", by Douglas Glucroft, McGraw-Hill World News, Electronics/Apr. 7, 1981.
"Application of Random Pattern Recognition Technique to Quantative Evaluation of Automatic Visual Inspection Algorithms", by K. Edamatsu, A. Komuro and Y. Nitta, 1982, IEEE, pp. 139-143.
"Stamped Character Inspection Apparatus Based on the Bit Matrix Method", by Y. Hongo and A. Komuro, 1982, IEEE, pp. 448-450.
"Digital Pattern Recognition by Moments", in Optical Character Recognition, by F. L. Alt, edited by G. L. Fischer et al., Spartan Books, 1962, pp. 153-179.
"The RCA Multi-Font Reading Machine", pp. 3-14, by W. J. Hannan Radio Corporation of America, Defense Electronics Products.

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