central_opencv raise error with --num_pyramid_levels = 4 about camera_calibration HOT 1 OPEN

The --num_pyramid_levels parameter is only intended for the generic camera models, because those are supposed to be optimized in a multi-resolution scheme in which their grid resolution is gradually increased. In the central_opencv model, there is no parameter grid, therefore this parameter does not apply and must always be set to 1.

A calibration with the central_generic model cannot be directly "converted" to a parametric model, however it is possible to fit a parametric model to the generic calibration result. But I don't remember whether there is an existing way to fit a (distortion-free) pinhole model to a calibration result with the program, or whether the code would need to be modified. As a start, there is existing code to fit a CentralThinPrismFisheyeModel to a calibration result with the --create_fitting_visualization flag, see here:

If you are mainly interested in parametric camera model parameters, perhaps a different calibration program could be better suited that focuses on these models.

from camera_calibration.