Surface texture recognition using multi-directional scanning

Details Surface texture recognition using multi-directional scanning Surface texture recognition using multi-directional scanning

1985-12-26

1987-09-22

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250236, 382 60, G06K 930

Patent

active

046957219

ABSTRACT:
In the invention, a light beam is scanned along a surface bearing data, such as a serial number. Reflected light is measured and processed for character recognition. The invention wobbles or dithers the light beam during the scan, and takes reflectivity measurements several times within a region on the surface, the region being called a pixel. This procedure enhances the reflectivity signature of edges, thus improving the ability to recognize characters.

REFERENCES:
patent: 3396276 (1968-08-01), Hardin et al.
patent: 3483511 (1969-12-01), Rabinow
patent: 3668636 (1972-06-01), Blucher
patent: 4032888 (1977-06-01), Broyles

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