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:
Feb. 10, 2004
Filed:
Mar. 14, 2002
Shigetaka Ogawa, Tokyo, JP;
Koitiro Hirao, Tokyo, JP;
Takahiro Hongu, Tokyo, JP;
Tamotsu Kusaka, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A line segment detector includes a first weighted average section which calculates the weighted average of pixel values in a first detecting window. The detector also includes a second weighted average section which calculates the weighted average of pixel values in a second detection window. A differentiating section calculates the absolute value of a difference between the outputs of the first and second weighted average sections. A dot detecting section calculates the average of absolute differential values between pixels in a vertical line direction, a horizontal line direction, and diagonal directions set in a detection window in an area containing the target pixel. If the difference between outputs of the dot detecting section and the differentiating section is larger than a threshold, it is determined that a portion near the target pixel is a vertical line image, a horizontal line image, or a diagonal image,
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile