Laser velocimetric image scanning

Details Laser velocimetric image scanning Laser velocimetric image scanning

2005-11-08

2009-06-09

Labaze, Edwyn (Department: 2887)

Registers

Coded record sensors

Particular sensor structure

C235S462010

Reexamination Certificate

active

07543750

ABSTRACT:
A bar code scanner includes a self-mixing laser sensor. A frequency of the signal output by that sensor is used to determine scanner velocity relative to the bar code, and an amplitude of that signal is used to determine color of bar code bands. Using velocity and amplitude data collected at multiple times during a scan of the bar code, the widths of the bands are calculated. An imaging scanner includes a laser velocimeter that generates velocity data. Using that velocity data, relative displacement between image frames is determined.

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