euratom-software/calcam

Fisheye model calibration not working

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It looks like calibration with the fisheye distortion model is not working, throwing various exceptions for reasons I'm not sure of.

This appears to basically be a consequence of this issue:

opencv/opencv#23962

For now I have "solved" it by setting the focal length initial guess differently depending on whether a fisheye or rectilinear distortion model is being used; and for the time being it seems to be working again. Also fixed some other bugs with the fisheye calibration in 2.14.