An extrinsic calibration method for 3D range surface sensors: an application in radiotherapy patient positioning

2007 ◽  
Author(s):  
Ruben Posada-Gomez ◽  
Giner Alor-Hernandez ◽  
Mario Alberto Garcia-Martinez ◽  
Juan Antonio Quintana-Silva
Keyword(s):  
Patient Positioning ◽  
Calibration Method ◽  
Extrinsic Calibration

scholarly journals A Robust Extrinsic Calibration Method for Non-Contact Gaze Tracking in the 3-D Space

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 48840-48849 ◽  
Author(s):  
Mun-Cheon Kang ◽  
Cheol-Hwan Yoo ◽  
Kwang-Hyun Uhm ◽  
Dae-Hong Lee ◽  
Sung-Jea Ko
Keyword(s):  
Calibration Method ◽  
Gaze Tracking ◽  
Extrinsic Calibration

scholarly journals Extrinsic LiDAR/Ground Calibration Method Using 3D Geometrical Plane-Based Estimation

Sensors ◽  
2020 ◽  
Vol 20 (10) ◽  
pp. 2841
Author(s):  
Mohammad Ali Zaiter ◽  
Régis Lherbier ◽  
Ghaleb Faour ◽  
Oussama Bazzi ◽  
Jean-Charles Noyer
Keyword(s):  
Ground Plane ◽  
Ground Surface ◽  
Real Data ◽  
Calibration Method ◽  
Parameters Estimation ◽  
Parameters Optimization ◽  
Method Performance ◽  
Extrinsic Calibration ◽  
Extrinsic Parameters ◽  
The Stability

This paper details a new extrinsic calibration method for scanning laser rangefinder that is precisely focused on the geometrical ground plane-based estimation. This method is also efficient in the challenging experimental configuration of a high angle of inclination of the LiDAR. In this configuration, the calibration of the LiDAR sensor is a key problem that can be be found in various domains and in particular to guarantee the efficiency of ground surface object detection. The proposed extrinsic calibration method can be summarized by the following procedure steps: fitting ground plane, extrinsic parameters estimation (3D orientation angles and altitude), and extrinsic parameters optimization. Finally, the results are presented in terms of precision and robustness against the variation of LiDAR’s orientation and range accuracy, respectively, showing the stability and the accuracy of the proposed extrinsic calibration method, which was validated through numerical simulation and real data to prove the method performance.

Point Laser Triangulation Probe Calibration for Coordinate Metrology

1999 ◽  
Vol 122 (3) ◽  
pp. 582-586 ◽  
Author(s):  
Kevin B. Smith ◽  
Yuan F. Zheng
Keyword(s):  
Contact Force ◽  
Calibration Method ◽  
New Method ◽  
Laser Triangulation ◽  
Coordinate Measuring Machines ◽  
Extrinsic Calibration ◽  
Coordinate Metrology ◽  
Probe Calibration ◽  
Calibration Parameters

Point Laser Triangulation (PLT) probes have significant advantages over traditional touch probes. These advantages include throughput and no contact force, which motivate use of PLT probes on Coordinate Measuring Machines (CMMs). This document addresses the problem of extrinsic calibration. We present a precise technique for calibrating a PLT probe to a CMM. This new method uses known information from a localized polyhedron and measurements taken on the polyhedron by the PLT probe to determine the calibration parameters. With increasing interest in applying PLT probes for point measurements in coordinate metrology, such a calibration method is needed. [S1087-1357(00)01703-2]

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