camera calibration to obtain internal parameters
# get samples
python sample_frames.py
# calibration
python camcalib.py
[[1.42646251e+03 0.00000000e+00 9.31140420e+02]
[0.00000000e+00 1.43047112e+03 5.46476796e+02]
[0.00000000e+00 0.00000000e+00 1.00000000e+00]]