Bar-code reader

Details Bar-code reader Bar-code reader

2006-07-18

2006-07-18

Frech, Karl D. (Department: 2876)

Registers

Coded record sensors

Particular sensor structure

C235S462010, C235S462080, C235S462180, C235S462190, C235S472010

Reexamination Certificate

active

07077322

ABSTRACT:
An extractor extracts a part that is apparently a bar-code signal from a signal that is subjected to opto-electric conversion. A narrow-band differential processor forms a waveform of an edge by differentiating by using a module frequency. The module point extractor extracts the module point from the waveform. The maximum likelihood judgment processor5fperforms ternarizing based on a maximum likelihood method by using broader information.

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