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:
Jul. 08, 2003
Filed:
Apr. 20, 1999
Denso Corporation, Kariya, JP;
Abstract
An image filter produces an emphasized output in response to a brightness change between a dark portion and a bright portion of a picked-up image, with a sign of the emphasized output reversing according to a transitional direction of the brightness change between the dark portion and the bright portion. An image filter produces an output representing an angular momentum of respective pixels about a central pixel in a predetermined processing zone set on the picked-up image. The angular momentum is defined by vectorial quantities of pixel values. An image filter produces an output representing an accumulative absolute value of the respective pixels in the predetermined processing zone. An output difference between the image filters and is obtained as an index representing a lane mark.