Working with a camera with variable focal length

asked 2017-10-27 07:05:37 -0500

ROSpioneer gravatar image

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?

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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.

LBerger gravatar imageLBerger ( 2017-10-27 08:30:20 -0500 )edit

What do you mean by all focals?

ROSpioneer gravatar imageROSpioneer ( 2017-11-02 08:51:56 -0500 )edit