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:
Oct. 21, 2003
Filed:
Aug. 06, 1999
Ichiro Harada, Tochigi-ken, JP;
Naoya Ohta, Maebashi, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A given visual field is divided into a plurality of areas, and brightness information in the areas is detected at predetermined time intervals and stored as information of a mobile body in a memory of a motor vehicle monitoring apparatus on a motor vehicle. The bright information detected in the areas at different times is then read from the memory, and a motion of the brightness information between adjacent ones of the areas is detected as a one-dimensional optical flow. The detected one-dimensional optical flow is compared with a one-dimensional optical flow generated from a road due to the speed of the motor vehicle, for thereby detecting another motor vehicle which is moving toward the motor vehicle.