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:
Nov. 15, 1994
Filed:
Jun. 11, 1993
Applicant:
Inventor:
Michihiro Nagaishi, Nagano, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
382 41 ; 382 22 ;
Abstract
When an image is entered from an input means, a line extracting means extracts and smoothes the contour of that image to obtain a tangent line passing through a certain point on that contour. A region with the certain point as the origin is determined, where Hough transform of a straight line is carried out with the center point of that region as the origin. Hough transform is carried out for all the points adjacent to the origin to obtain an envelope. A tangent line is predicted by the obtained envelope.