Working with a camera with variable focal length
I'm using a camera for tracking and pose estimation.. I know that we need to calibrate the camera to estimate the pose then we're not supposed to change their parameters after that.. My question is if I use a camera which its focal length can be remotely changed, do I still need to re calibrate the camera every time I change its focal? Or there is another way to work with it like estimate the new parameters or something like that?
Normally you must calibrate your camera for all focals. But you can try to calibrate your camera using shortest focal( maximum of field of view) and longest focal . Try a linear interpolation of parameters. If it is not good add a medium focal.
What do you mean by all focals?