Communications: electrical – Digital comparator systems
Patent
1974-12-27
1976-11-16
Boudreau, Leo H.
Communications: electrical
Digital comparator systems
3401463AC, G06K 912
Patent
active
039926974
ABSTRACT:
A character recognition system comprising means for scanning a character on a document field, the field being composed of plural features each of which lies in a respectively defined area on the character. A pair of video shift registers, one for positive video and one for negative video, are provided to shift the signals therethrough. Each video shift register includes a plurality of stages for serially storing and shifting a binary quantization of a character pattern sample within said field. Feature extraction logic circuitry is provided and includes a plurality of feature detecting means to provide signals indicative of the recognition of predetermined features as the character pattern is shifted through selected stages of the video shift register. The detecting means include plural mask matrices coupled to said video shift registers. The output of the matrices are provided to encoding means for encoding the signals from the matrices into plural, multi-bit binary codes, one of such codes for each of said geographic areas. Each code serves to indicate a feature detected within the geographic area. Plural shift registers are provided coupled to the encoding means to store said codes. Decoding means are coupled to the code storing shift registers to decode the signals therefrom and to provide signals indicating the recognition of a character having the features detected. Further encoding means are provided to encode the signal indicating the recognition of a character into a binary code for use by a central processor. In order to minimize the number of components to create the masks some high usage masks are gated together and provided as inputs to other masks and the first encoding means. In addition, delay means are provided associated with each mask to duplicate sub-features without necessitating the use of separate components of each sub-feature.
REFERENCES:
patent: 3273124 (1966-09-01), Greanias
patent: 3541511 (1970-11-01), Genchi et al.
patent: 3573730 (1971-04-01), Andrews et al.
patent: 3676847 (1972-07-01), Partin
patent: 3868635 (1975-02-01), Shah et al.
patent: 3873972 (1975-03-01), Levine
patent: 3930231 (1975-12-01), Henrichon et al.
Knab John L.
McIntyre John J.
Boudreau Leo H.
Scan-Data Corporation
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