how to keep ppx/ppy constant

[leviome]

thanks a lot for sharing the nice work!

I want to keep ppx=960, ppy=540 after estimation, so what should I do?

Initial intrinsics:
fx = 1500.0, fy = 1500.0, ppx = 960.0, ppy = 540.0
Estimated intrinsics:
fx = 1459.80, fy = 1469.26, ppx = 957.78, ppy = 502.28

thank you very much!