Issue with Calibrating Three Overlapping Fisheye Cameras Using Kalibr

[fervh]

I am having trouble calibrating three fisheye cameras with overlapping horizontal fields of view. The setup includes:

• One camera at 0 degrees.
• Two cameras at ±105 degrees.
• Each camera has a 187° field of view.

I have recorded a bag file using an AprilTag calibration pattern of size A0. However, I am stuck while running the rosrun kalibr kalibr_calibrate_cameras command. I’m unsure if my process is correct or if there are specific adjustments or parameters I need to account for when working with fisheye cameras and the A0-sized pattern.

Any help or guidance on properly calibrating these cameras would be greatly appreciated!