In the camera_calibration code, the marker side length and separation between two separate markers is mentioned in meters. So, this should be measured when you print the board. Thus in README, the steps should be changed from:
./camera_calibration -d=16 -dp=../detector_params.yml -h=2 -w=4 -l=200 -s=100 ../../calibration_params.yml
TO
./camera_calibration -d=16 -dp=../detector_params.yml -h=2 -w=4 -l=\<measured length in meters> -s=\<measured length in meters> ../../calibration_params.yml
Thank you for pointing this out. Yes, you are correct. I guess I copied and pasted the arguments from the marker generation commands, and forgot to change that.
In the camera_calibration code, the marker side length and separation between two separate markers is mentioned in meters. So, this should be measured when you print the board. Thus in README, the steps should be changed from: ./camera_calibration -d=16 -dp=../detector_params.yml -h=2 -w=4 -l=200 -s=100 ../../calibration_params.yml
TO
./camera_calibration -d=16 -dp=../detector_params.yml -h=2 -w=4 -l=\<measured length in meters> -s=\<measured length in meters> ../../calibration_params.yml