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:
Jan. 11, 1977
Filed:
Mar. 24, 1975
Applicant:
Inventors:
Assignee:
Sharp Kabushiki Kaisha, Osaka, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
3401 / ;
Abstract
Optical information on a card is read by an image sensor and then converted to a video signal represented by a digital signal of several bits through the use of an amplifier and an A - D converter. A reference level is determined by scanning a reference portion which is preferably provided along one edge of the card. The video signal is quantized by comparing with three sliced levels corresponding to 0.5, 0.75 and 0.85 times the reference level. The quantized information is applied to a recognition station.
Sasaki, Hiromu. (1977). Level determination for optical character reader (U.S. Patent No. 4003021). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4003021
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile