Although it can be challenging, the absolute best target for lens calibration is the night sky - I can guarantee that you won't have any parallax problems with the stars! As with a chessboard, the control point finder will fail miserably so you have to set them manually; but once you've got them the results will be pretty much perfect. I know, as I did this with a six-shot series with a 16mm lens and ended up with an RMS error under 1 pixel and a maximum error just over 1 pixel.
Sent from my PDP-11/93 > On Dec 10, 2016, at 2:49 AM, hugin-ptx@googlegroups.com wrote: > > > hugin-ptx@googlegroups.com Google Groups > Topic digest > View all topics > Printed image for stitch calibration - 1 Update > Printed image for stitch calibration > Bruno Postle <brunopos...@googlemail.com>: Dec 09 10:24AM > > Hugin cpfind looks for features that are unique, so a chessboard > really confuses it. Also for calibration parallax is a big problem, so > it is much better to use a scene where the features are a long > physical distance from the camera, i.e. go outside and hold the rig > high above the ground. > > The fine-tune function in the Control Points tab uses different code > altogether, this is happiest with corners - when manually picking > control points you should always be looking for corners - in this case > chessboard-like features are ideal. > > -- > Bruno > > On 8 December 2016 at 23:47, Ben Knill wrote: > Back to top > You received this digest because you're subscribed to updates for this group. > You can change your settings on the group membership page. > To unsubscribe from this group and stop receiving emails from it send an > email to hugin-ptx+unsubscr...@googlegroups.com. -- 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 hugin-ptx+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/hugin-ptx/0FA7770E-9EE1-412F-83CD-82B5F8F22171%40gmail.com. For more options, visit https://groups.google.com/d/optout.
