Method of identification of a product for the purpose of prevent

Details Method of identification of a product for the purpose of prevent Method of identification of a product for the purpose of prevent

1988-10-04

1991-03-26

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

283 73, 283 81, 380 28, 382 1, G06K 918

Patent

active

050036122

ABSTRACT:
This method consists in introducing a programmed defect at the writing level; the defect will be detected at the reading level by means of a key corresponding to the writing control algorithm which is known only to the user.

REFERENCES:
patent: 3709525 (1973-01-01), Frank
patent: 4263504 (1981-04-01), Thomas
patent: 4286146 (1981-08-01), Uno et al.
patent: 4458333 (1984-07-01), Smith
patent: 4545066 (1985-10-01), Gascuel et al.
patent: 4637051 (1987-01-01), Clark

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