Re: [PanoToolsNG] leveling/squaring blues
> http://www.sphericalpanoramas.com/crooked-regents.htmlI don't think there is any, except for having a perfect tripod and head
> What eludes me is an ironclad methodology to fix difficult rooms like this
without play and making sure the anchor shot is perfectly levelled..
Usually setting two vertical control point at a 90 degree distance works
for me. Sometimes I set three at 120 degrees distance.
Sometimes I get away with just rightclick dragging the image in the ptgui
editor until it looks straight enough to me.
The trouble is that you have to tell what points should be exactly above
other points. And in a crooked room that often is a bit of trial and
Mathematically there's no difference in optimizing verticals before
stitching and optimizing verticals on the equirectangular image.
Optimizing the equirectangular is just an extra remapping pass that will
effect in a bit more loss of detail. But it is usually easier to perform
the trial and error on the equirectangular than it is to perform on the
whole set of images.