The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 21, 1989
Filed:
Jul. 16, 1986
John A Robertson, Chillicothe, OH (US);
Telesis Controls Corporation, Chillicothe, OH (US);
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.