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:
Jun. 09, 2020
Filed:
Jun. 01, 2016
Xovis Ag, Zollikofen, CH;
Markus Herrli, Allmendingen, CH;
Adrian Pauli, Burgdorf, CH;
XOVIS AG, Zollikofen, CH;
Abstract
In a method for calibration of a stereo camera () comprising two cameras () arranged in a distance along a first direction (x) and mechanically attached to a common structure, rectification functions mapping raw image coordinates to rectified coordinates are provided. Recalibration is based on images of a scene captured by the stereo camera () affixed in an observation position, the recalibration yielding correction functions mapping rectified coordinates to corrected coordinates. Recalibration is based on matching objects comprised in images of the captured scene obtained by the two cameras (). The stereo camera () is affixed in a fixed relationship with a planar surface (), with a known distance and angle between the stereo camera () and the surface (), and objects are matched in the recalibration that belong to the surface (), wherein a disparity caused by the known distance is exploited when determining the correction functions. Exploiting the additional information with respect to the surface (), the determination of the correction functions may be greatly improved. In particular, the inventive method allows for employing general correction functions, and no modelling of the calibration errors is required.