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. 03, 1998
Filed:
Mar. 01, 1995
Mamoru Nakanishi, Isehara, JP;
Takeshi Ogura, Atsugi, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
An image processing apparatus for extracting lines from an image using the Hough transform. A processor element is assigned to each quantization point in a Hough space. Each processor element calculates, for each scanning line of the image, intersections of the scanning line and the line corresponding to this processor element once per scanning line. A black pixel (a Hough transform object point) on the scanning line is also obtained sequentially. The coordinate values of the intersection are compared with those of the Hough transform object point, and when they agree, voting to a ballot box memory of the processor element is performed. The voting results become Hough transform data. This makes it possible to implement a high speed Hough transform, and to reduce the size of the apparatus.