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. 01, 1994
Filed:
Apr. 29, 1991
Masao Takatou, Katsuta, JP;
Kazunori Takahashi, Hitachi, JP;
Nobuhiro Hamada, Hitachiota, JP;
Tadaaki Kitamura, Hitachi, JP;
Kuniyuki Kikuchi, Hitachiota, JP;
Hiroshi Takenaga, Tokai, JP;
Yasuo Morooka, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
This invention relates to a method an apparatus for measuring traffic flows or in other words, the flows of vehicles, inside and near a crossing, and is directed to provide method and apparatus capable of extracting vehicles with a high level of accuracy. Overlap of vehicles can be avoided by setting the field of a camera not to a range from the inflow portion to the vicinity of center of the crossing, but to a range from the center to the vicinity of the outflow portion (151) of the crossing. Accordingly, accuracy of traffic flow measurement can be improved.