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. 23, 2012
Filed:
Mar. 01, 2010
Masaya Itoh, Hitachinaka, JP;
Masanori Miyoshi, Mito, JP;
Masato Kazui, Sapporo, JP;
Hiromasa Fujii, Kawasaki, JP;
Shun'ichi Kaneko, Sapporo, JP;
Hidenori Takauji, Sapporo, JP;
Masaya Itoh, Hitachinaka, JP;
Masanori Miyoshi, Mito, JP;
Masato Kazui, Sapporo, JP;
Hiromasa Fujii, Kawasaki, JP;
Shun'ichi Kaneko, Sapporo, JP;
Hidenori Takauji, Sapporo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
This is a video image monitoring system which can effectively detect a mobile object appearing in a captured video image even if a background image and other camera condition change continuously. The video image monitoring system comprises: a video-image-capturing sectionfor putting out image data based on a video image signal obtained by using a camera; a mobile-object-candidate-area-detecting sectionfor extracting a candidate area of a mobile object from the image data; and a mobile-object-detecting sectionfor determining whether the candidate area is the mobile object. The mobile-object-candidate-area-detecting sectionquantizes a brightness gradient direction of the image data, and calculates a spatio-temporal histogram which represents the frequency of a direction code appearing in a predetermined spatio-temporal space. After that, the mobile-object-candidate-area-detecting sectioncalculates a statistical spatio-temporal space evaluation value of the spatio-temporal histogram. The mobile-object-detecting sectionuses the spatio-temporal space richness to determine whether the candidate area is the mobile object.