Method of reading concavo-convex bar code

Details Method of reading concavo-convex bar code Method of reading concavo-convex bar code

1985-04-24

1987-08-18

Wan, Gene

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250571, 382 14, G06K 500, G01N 2186

Patent

active

046879420

ABSTRACT:
In a method of reading a concavo-convex bar code disposed on the surface of an article, the improvement comprising the steps of scanning the concavo-convex bar code by a displacement sensor to detect the concavo-convexity, determining the areas of the resulting concavo-convex waveforms, and comparing the area thus obtained with the reference areas of the thick and thin bars of the bar code to judge the pattern of the bar code.

REFERENCES:
patent: 4533825 (1985-08-01), Yamada

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