Character recognition method and apparatus

Details Character recognition method and apparatus Character recognition method and apparatus

1990-05-14

1992-05-12

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 16, 382 25, G06K 946

Patent

active

051134535

ABSTRACT:
An image system (SPI) provides an image file which is recorded in a memory (3). A segmentation and framing module (M1) isolates each of the characters in the image file within individual matrices. A module (M2) finds primitive shapes in each character matrix by initially finding strokes therein and then substracting the strokes from the matrix. A module (M3) then makes a description of primitive shapes in the form of at least one partially ordered list of primitive shapes, and a module (M4) compares said description with standard description expressed in the same manner in a data base (M5). Character recognition, per se, is performed by determining the distances between the description of a character to be identified and the standard descriptions.

REFERENCES:
patent: 4712248 (1987-12-01), Hongo
patent: 4718090 (1988-01-01), Cooper, Jr.
patent: 4771474 (1988-09-01), Takashima et al.
Automatic Interpretation and Classification of Images, a NATO Advanced Study Institute, Edited by A. Grasselli, 1969, Academic Press, New York: J. R. Parks: "A Multi-Level System of Analysis for Mixedfont and Hand-Blocked Printed Characters Recognition", pp. 295-322.
Patent Abstracts of Japan, vol. 8, No. 6, p. 247, Jan. 12, 1984.
Pattern Recognition, vol. 3, 1971, pp. 345-361, Pergamon Press, GB, R. Narashimhan et al: "A syntax-aided recognition scheme for handprinted English letters".
The Marconi Review, vol. 32, Nos. 172-175, Jan.-Dec. 1969, pp. 82-104, Chelmsford, Essex, GB; J. Thompson et al: "Experimental multifont page reader".

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