Electronic code enhancement for code readers

Details Electronic code enhancement for code readers Electronic code enhancement for code readers

1986-07-16

1989-02-21

Paschall, M. H.

Registers

Coded record sensors

Particular sensor structure

235463, 235471, 382 12, 250568, G06K 710

Patent

active

048067415

ABSTRACT:
An enhancement circuit for code readers of the variety employing a video input wherein transitions within each horizontal scan are detected and sampled for code correspondence. The enhancement develops a sequence of time spaced memory columns for each horizontal scan into which arithmetic values are submitted upon the occurrence of a transition and from which arithmetic values are decremented upon the failure of an occurrence of a transition. Thus, a statistical likelihood of occurrence of code component transitions is maintained in memory to electronically "stretch" the code components to enhance readability. Special cases are accommodated for for overrun and underrun conditions in the arithmetic adjustments which are carried out. A magnitude comparator functions to provide an output to the system representing an enhanced transition.

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