On Jan 5, 11:09 pm, Tom Sharpless <[email protected]> wrote: >.... > BTW one of the best treatments of lens calibration and correction I've > seen is this article, brought to my attention last year by Michel > Thoby:http://trs-new.jpl.nasa.gov/dspace/bitstream/2014/37251/1/03-0869.pdf. > It has a clear and thorough treatment of 'entrance pupil shift' and > describes a parameterized ideal angle-to-radius function more elegant > than mine. Needs serious study, but worth it. > > Cheers, Tom Sorry I don't have time to go digest all of this discussion; hopefully I will in the future. I just wanted to mention that two sources of widely-used lens calibration are from Jean-Yves Bouguet: http://www.vision.caltech.edu/bouguetj/calib_doc/ and OpenCV: http://opencv.willowgarage.com/documentation/camera_calibration_and_3d_reconstruction.html The Caltech link includes a bunch of references and related links, and IIRC justified using the even-power polynomials based on optic characteristics, as well as numerical stability.
I discovered that if you limit Hugin to the 'b' parameter, and the Caltech package to just the 'r^2' parameter, and scale the radial term appropriately, they do indeed get the same answer - Caltech from pictures of checkerboards, and Hugin from calibrating a 360 panorama. Encouraging.... Regards, Aron -- You received this message because you are subscribed to the Google Groups "Hugin and other free panoramic software" group. A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/hugin-ptx
