Yes, the XYZ mosaic optimisation will resolve quite extreme parallax errors, but only for features on a single flat plane in the scene.
In this case your ground is close enough to being planar, so Hugin can fix parallax for all photos, not just the nadir. By default this plane needs to be opposite the panorama view, which is why you had to tilt the scene by 90°. This is a good solution, just render the panorama like this and then load the result into Hugin and tilt it back. A more advanced usage is to use the 'plane yaw' and 'plane pitch' parameters to move this plane to the nadir, but I suggest you only try this if you are feeling confident. -- Bruno On 5 September 2018 19:47:44 BST, 'Phanto B' wrote: >Hello everyone, > >This is the progress so far. Any help is welcome. > >Reminder/summary: > 360x180 pano >8mm fullframe fisheye lens (samyang), canon eos 700d, tripod (1.5 meter > >from the ground), without a panohead >4 horizon photos (landscape format), 1 zenith, 1 nadir (the nadir is >shot >handheld) > Hugin > >[image: six photos.jpg] <about:invalid#zClosurez> > >Symptoms: > Seams on the ground (the closest element to the camera) > >Track explored: >Ground parallax errors caused by the absence of panohead, and the fact >that the ground is not perfectly flat. > >But maybe this is not the cause: the following optimisation made a >perfect >nadir hemisphere: > >1) In the preview window, the nadir photo is moved to the center of the > >image (equirectangular projection, pitch to +90°) >2) In the custom optimiser tab, checked the following values > for the horizon's first photo (reference): nothing > for the nadir photo, everything: ypr, xyz, plane yaw, plane pitch, >camera translation > for the rest (horizon's three remaining photos + zenith): ypr xyz > >This has the side effect of eliminating from the panorama the zenith >hemisphere (maybe this is what this document is warning against >http://hugin.sourceforge.net/docs/manual/Hugin_Optimiser_tab.html ), >except >for the reference photo. But the important thing is that the nadir >hemisphere is absolutely seamless, so maybe there is no (or negligible) > >parallax errors for the ground. > >[image: seamless-nadir-hemisphere.jpg] <about:invalid#zClosurez> -- 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/949D6792-B78D-4327-82AC-28974A7231F7%40postle.net. For more options, visit https://groups.google.com/d/optout.
