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:
Mar. 20, 1990
Filed:
Apr. 18, 1988
Tetsuo Umeda, Tokyo, JP;
Shigenobu Kasuya, Tokyo, JP;
NEC Corporation, , JP;
Abstract
A video image of a region including characters recorded on a document is converted into electric signals. From the electric signals unit signals corresponding to subregions obtained by dividing the region is picked up. Horizontal, vertical and slanted stroke components included in each of the subregions are detected from the unit signals. The detected numbers of the horizontal, vertical and slanted stroke components are counted. The ratio of the counted numbers of the slanted stroke component to the total of the horizontal, vertical and slanted stroke components is calculated. The characters on the document is judged as handwritten ones and machine-printed ones if the ratio is above and not above a predetermined threshold, respectively. The threshold is preferably set at 0.2.