Hi Oskar,
I tried the several-lines method for calibrating my lens, and it indeed worked quite nicely. Oskar Sander wrote: > > sorry for waking up an old thread. > > I'd like to use this method to calibrate a UW camera set-up. That is, > a camera in a housing with a wide angle lens attached on the housing. > Obviously this set-up is very much different from the camera on land > so I need to do it in the pool, so I need to plan the exercise in > beforehand. > > > The pool have a lot of natural lines to use in the tiles of the pool, > the question is if these would be good enough, or if I must make my > own lines using a little buoy with a weight and orange string to get > enough accuracy? My experience was that the lines from the spacings between tiles look nice until you start and use them for setting the control points. The exct placement gets a bit uncertain and thus you get a higher noise which falls back on the derived parameters unless you have many points. I.e., if you use them I'd make sure to take a lot of images with lines going through the FOV at different positions and in different angles. If I remember correct I was using something like 10 images, defining some 30 lines in there... Pit -- Dr. Peter "Pit" Suetterlin http://www.astro.su.se/~pit Institute for Solar Physics Tel.: +34 922 405 590 (Spain) p.suetter...@royac.iac.es +46 8 5537 8534 (Sweden) peter.suetter...@astro.su.se --~--~---------~--~----~------------~-------~--~----~ 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 hugin-ptx@googlegroups.com To unsubscribe from this group, send email to hugin-ptx-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/hugin-ptx -~----------~----~----~----~------~----~------~--~---
