Two dimensional code for processing data

Details Two dimensional code for processing data Two dimensional code for processing data

1994-02-02

1996-04-16

Han, Frances

Printed matter

Having revealable concealed information, fraud preventer or...

Utilizing electromagnetic radiation

235494, 250568, G06K 1900, G06K 710

Patent

active

055075274

ABSTRACT:
A system for reading two-dimensional code marks on an article includes a camera for imaging the marks and signal processing means coupled to the camera for processing information contained in the marks. The article bears code marks in a fixed-size marking zone on the article surface. Each of the code marks has a pattern of light and dark areas. The code marks are arranged in a matrix patterned unit block; the matrix may be a single row or column as well as rectangular or truncated rectangular. The unit block includes at least one position code which in turn includes code marks denoting an address code, a start code, an end code, and a line feed code. The code marks are preferably each a block of four squares, with each square being bisected by a respective diagonal line to form two triangles. Each triangle in a square may be differently colored (light or dark).

REFERENCES:
patent: 3977007 (1976-08-01), Berry et al.
patent: 5414250 (1995-05-01), Swartz et al.

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