Formation method of two-dimensional code

Details Formation method of two-dimensional code Formation method of two-dimensional code

1999-06-10

2000-12-26

Pitts, Harold I.

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Particular code pattern

235456, G06K 1906

Patent

active

061645524

ABSTRACT:
A formation method of a two-dimensional code according to the present invention is characterized in that the method comprises the steps of: substituting a square unit cell, in which a plurality of dark round dots 6 are arranged in a matrix, for a dark unit cell from image data of a two-dimensional code 1 formed in a bright and dark pattern to transform the image data; burning these dark round dots 6 on a marking surface with a laser beam; and forming the two-dimensional code in a dark and bright pattern formed by combining dark unit cells 2A, formed with dark round dots 6, and bright unit cells 2b to which laser burning has not been performed.

REFERENCES:
patent: 4939354 (1990-07-01), Priddy et al.

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