Our current method for multi-lidar calibration is targetless. We do not need any calibration target such as a checkerboard.
Data for lidar-to-lidar calibration: To calibrate your LiDAR sensors, capture one frame each from both the LiDAR sensors of the same scene.
Please keep a note of the following while collecting data:
Each frame captured from the two LiDAR sensors must overlap with each other.
The overlapping section must contain stationary and distinguishable objects for better performance and results.
Each calibration dataset supports only one pair of LiDAR sensors. To calibrate a new pair of LiDAR sensors, follow the above steps and create a new dataset.