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. 10, 2025
Filed:
Mar. 24, 2022
Black Sesame Technologies Inc., San Jose, CA (US);
Huiyan Li, Shanghai, CN;
Yangyang Li, Shanghai, CN;
Tao Zhang, Shanghai, CN;
Yicheng Zhang, Shanghai, CN;
Black Sesame Technologies Inc., San Jose, CA (US);
Abstract
An obtaining method for image coordinates of a position invisible to a camera, a calibration method and a system are disclosed. A first color image and corresponding depth image of a position to be measured invisible to a main camera are obtained from a depth camera. The depth camera is positioned so that the position to be measured is within a field of view of the depth camera. Three-dimensional coordinates of the position to be measured are extracted from the first color image and corresponding depth image. And the three-dimensional coordinates of the position to be measured are converted into the required image coordinates of the position to be measured by a translation matrix and a rotation matrix for converting a depth camera coordinate system into a main camera coordinate system. The translation matrix and the rotation matrix are determined by calibration between the main camera and the depth camera.