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:
May. 10, 1983
Filed:
Sep. 26, 1980
Applicant:
Inventors:
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358280 ; 3401 / ; 358282 ; 382 65 ;
Abstract
An optical reader system includes a plurality of sensor elements for providing a picture signal. Before initiating an actual reading operation, a white background plate is scanned to obtain reference information. The white background plate data is reversed to obtain a reciprocal of the white level and the thus obtained reciprocal is memorized in a memory. In an actual reading operation, the picture signal derived from the sensor elements is multiplied by the reciprocal memorized in the memory to compensate for the nonuniformity of the sensor outputs.
Sasaki, Hiromu. (1983). Read-out level compensation in an optical reader system (U.S. Patent No. 4383275). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4383275
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile