|
Title
|
|
|
|
Extrinsic camera calibration with line-laser projection
| |
|
Author
|
|
|
|
| |
|
Abstract
|
|
|
|
| Knowledge of precise camera poses is vital for multi-camera setups. Camera intrinsics can be obtained for each camera separately in lab conditions. For fixed multi-camera setups, the extrinsic calibration can only be done in situ. Usually, some markers are used, like checkerboards, requiring some level of overlap between cameras. In this work, we propose a method for cases with little or no overlap. Laser lines are projected on a plane (e.g., floor or wall) using a laser line projector. The pose of the plane and cameras is then optimized using bundle adjustment to match the lines seen by the cameras. To find the extrinsic calibration, only a partial overlap between the laser lines and the field of view of the cameras is needed. Real-world experiments were conducted both with and without overlapping fields of view, resulting in rotation errors below 0.5 degrees. We show that the accuracy is comparable to other state-of-the-art methods while offering a more practical procedure. The method can also be used in large-scale applications and can be fully automated. |
| |
|
Language
|
|
|
|
English
| |
|
Source (journal)
|
|
|
|
Sensors. - -
| |
|
Publication
|
|
|
|
2021
| |
|
ISSN
|
|
|
|
1424-8220
| |
|
DOI
|
|
|
|
10.3390/S21041091
| |
|
Volume/pages
|
|
|
|
21
:4
(2021)
, 15 p.
| |
|
Article Reference
|
|
|
|
1091
| |
|
ISI
|
|
|
|
000624680600001
| |
|
Pubmed ID
|
|
|
|
33562538
| |
|
Medium
|
|
|
|
E-only publicatie
| |
|
Full text (Publisher's DOI)
|
|
|
|
| |
|
Full text (open access)
|
|
|
|
| |
|