3D LIDAR-Camera Extrinsic Calibration Using an Arbitrary Trihedron

Sensors

Xiaojin Gong¹  Ying Lin² 

[1] Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China;

关键词: extrinsic calibration;    3D LIDAR-camera system;    sensor fusion;   

DOI  :  10.3390/s130201902

来源: mdpi

【 摘 要 】

This paper presents a novel way to address the extrinsic calibration problem for a system composed of a 3D LIDAR and a camera. The relative transformation between the two sensors is calibrated via a nonlinear least squares (NLS) problem, which is formulated in terms of the geometric constraints associated with a trihedral object. Precise initial estimates of NLS are obtained by dividing it into two sub-problems that are solved individually. With the precise initializations, the calibration parameters are further refined by iteratively optimizing the NLS problem. The algorithm is validated on both simulated and real data, as well as a 3D reconstruction application. Moreover, since the trihedral target used for calibration can be either orthogonal or not, it is very often present in structured environments, making the calibration convenient.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.