System for encoding data in machine readable graphic form

Details System for encoding data in machine readable graphic form System for encoding data in machine readable graphic form

1991-01-18

1992-10-27

Gregory, Bernarr E.

Cryptography

Electric signal modification

Having production of printed copy

380 18, 379100, 358468, 358470, H04N 144

Patent

active

051596350

ABSTRACT:
A system for representing and recognizing data in machine readable graphic image form in which data to be encoded is entered into the system and a processor encodes the data into a two-dimensional pattern of graphic indicia and generates transfer drive signals representative of the indicia. A transferring device such as a printer transfers an image of the two-dimensional pattern of graphic indicia onto a carrier such as a card or paper document in response to the transfer drive signals. A recognition device converts the image on the carrier into electrical signals representative of the graphic indicia and decodes the signals into output signals representative of the data for further processing or use.

REFERENCES:
patent: 4641347 (1987-02-01), Clark et al.
patent: 4654718 (1987-03-01), Sueyoshi
patent: 4893333 (1990-01-01), Baran et al.
patent: 4908873 (1990-03-01), Philibert et al.
patent: 4975948 (1990-12-01), Andresen et al.

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