I wanted to "straighten out" (remove all perspective effects) the facade of a building foubnd in google street view, so that I could take measurements from it (photogrammetry).
Normally hugin can do this easily, at least on images I've photographed myself. Set a vertical CP-pair left and right, set a horizontal pair top and bottom, optimise all of YPR. Done. But this screen shot would simply not behave. CP errors were large. Eventually a memory scratched at me, and I added HFOV to the values to be optimised, but still no success. Oddly, HFOV was not changed at all, even to a "bad" value. I tried searching though HFOV values manually, and as I increased it (10 degrees at a time), it suddenly not only changed, but it optimised, as did YPR, and the result was a nigh perfectly rectilinear building (well, facade anyway). It appears that my fairly random initial HFOV value put the numbers in a bad solution the optimiser couldn't escape from. So 1) To others doing something similar - try manual altering HFOV 2) Does anyone know a rule of thumb or visual reference for estimating HFOV ? -- A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ --- You received this message because you are subscribed to the Google Groups "hugin and other free panoramic software" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/hugin-ptx/CAD1remZOaPAG057BBBBwGpko688rX41JWMEDnmah1eMNhQb%3D4w%40mail.gmail.com.
