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:
Dec. 17, 2019
Filed:
Sep. 02, 2015
Kabushiki Kaisha Topcon, Itabashi-ku, JP;
You Sasaki, Itabashi-ku, JP;
Tadayuki Ito, Itabashi-ku, JP;
KABUSHIKI KAISHA TOPCON, Tokyo, JP;
Abstract
A technique for efficiently calibrating a camera is provided. Reference laser scan data is obtained by scanning a buildingby a laser scanner, which is fixed on a vehicleand has known exterior orientation parameters, while the vehicletravels. An image of the buildingis photographed at a predetermined timing by an onboard camera. Reference point cloud position data, in which the reference laser scan data is described in a coordinate system defined on the vehicleat the predetermined timing, is calculated based on the trajectory the vehiclehas traveled. Matching points are selected between feature points in the reference point cloud position data and in the image. Exterior orientation parameters of the cameraare calculated based on relative relationships between the reference point cloud position data and image coordinate values in the image of the matching points.