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. 03, 2026
Filed:
Nov. 25, 2022
Hitachi Astemo, Ltd., Hitachinaka, JP;
Kazuyoshi Yamazaki, Tokyo, JP;
HITACHI ASTEMO, LTD., Hitachinaka, JP;
Abstract
A camera calibration method for calibrating a camera that captures an image through a windshield includes acquiring a calibration image associated with a calibration object by imaging by the camera. A calibration object has a linear portion extending in one direction intersecting an optical axis of the camera through the windshield, and the calibration object is a wire or a bar. The method further includes extracting a first linear portion image corresponding to the linear portion from the calibration image. The method further includes correcting distortion of the calibration image by comparing the first linear portion image with a second linear portion image captured when the linear portion is imaged by the camera not through the windshield.