Method and system for automatic extrinsic calibration of SPAD LiDAR and camera pairs
US12154296B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2022 |
| Grant date | Nov 26, 2024 |
| Priority date | — |
| Expiry date | Jul 5, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30252
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of calibrating a camera sensor and a SPAD LiDAR includes extracting identified features in each of a selected camera image and an ambient-intensity (A-I) image, generating a set of keypoints based on the identified features extracted for each of the images to provide a set of 2D camera keypoint locations and a set of 2D A-I keypoint locations, determining matched keypoints based on the set of 2D A-I keypoint locations and the set of 2D camera keypoint locations to provide a set of 2D A-I matched pixel locations and a set of 2D camera matched pixel locations, interpolating a 3D point cloud data with the set of 2D A-I matched pixel locations to obtain a set of 3D LiDAR matched pixel locations, and determining and storing extrinsic parameters to transform the set of 3D LiDAR matched pixel locations with the set of 2D camera matched pixel locations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.