Camera calibration and distortion parameters to OpenCV

Hi,
I am interesting in use calculated camera calibration and distortion parameters from RC in OpenCv. Have somebody experience with this? Main problem is convert principal points. In OpenCv principal points are defined in pixels from top left corner, but I don’t know how it is in RC.
Thanks
Peter

Hi, are you using XMPs to get the parameters of bundle.out ?

I don’t know XMP…I found that in bundle.out are only focal length and two radial distortion coefficients…
I set in RC constant calibration group and in Aligment Settings distortion model K + Brown3 with tangential2 and I wanted use after align images registration camera calibration and lens distortion parameters in OpenCv…