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Kalibr

Introduction

Kalibr is a toolbox that solves the following calibration problems:

Multi-Camera Calibration: Intrinsic and extrinsic calibration of a camera-systems with non-globally shared overlapping fields of view
Visual-Inertial Calibration (CAM-IMU): Spatial and temporal calibration of an IMU w.r.t a camera-system along with IMU intrinsic parameters
Multi-Inertial Calibration (IMU-IMU): Spatial and temporal calibration of an IMU w.r.t a base inertial sensor along with IMU intrinsic parameters (requires 1-aiding camera sensor).
Rolling Shutter Camera Calibration: Full intrinsic calibration (projection, distortion and shutter parameters) of rolling shutter cameras.

To make the calibration task more convenient and reproducible the following tools are available:

Camera Focus: Tool to set the camera focus in a reproducible way
Calibration Validator: Validation tool that computes the reprojection error statistics of the calibrated camera-system on live ROS image streams

For questions or comments, please open an issue on Github.

Tutorial: IMU-camera calibration

A video tutorial for the IMU-camera calibration can be found here:

(Credits: @indigomega)

Authors

Paul Furgale
Jérôme Maye
Jörn Rehder
Thomas Schneider (email)
Luc Oth
Timo Hinzmann (email)

References

The calibration approaches used in Kalibr are based on the following papers. Please cite the appropriate papers when using this toolbox or parts of it in an academic publication.

Joern Rehder, Janosch Nikolic, Thomas Schneider, Timo Hinzmann, Roland Siegwart (2016). Extending kalibr: Calibrating the extrinsics of multiple IMUs and of individual axes. In Proceedings of the IEEE International Conference on Robotics and Automation (ICRA), pp. 4304-4311, Stockholm, Sweden.
Paul Furgale, Joern Rehder, Roland Siegwart (2013). Unified Temporal and Spatial Calibration for Multi-Sensor Systems. In Proceedings of the IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), Tokyo, Japan.
Paul Furgale, T D Barfoot, G Sibley (2012). Continuous-Time Batch Estimation Using Temporal Basis Functions. In Proceedings of the IEEE International Conference on Robotics and Automation (ICRA), pp. 2088–2095, St. Paul, MN.
J. Maye, P. Furgale, R. Siegwart (2013). Self-supervised Calibration for Robotic Systems, In Proc. of the IEEE Intelligent Vehicles Symposium (IVS)
L. Oth, P. Furgale, L. Kneip, R. Siegwart (2013). Rolling Shutter Camera Calibration, In Proc. of the IEEE Computer Vision and Pattern Recognition (CVPR)

License (BSD)

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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Neither the name of the Autonomous Systems Lab and Skybotix AG nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

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