PanoTools:
Need help stitching my helicopter panorama!
Edward Fink 2005-Jun-02 21:52:05
I could use some help if anyone has the time to try stitching
some aerial photos to see if I'm doing something wrong.
I shot my first panoramas from a helicopter Tuesday, but they
have so many stitching errors that I'm about to trash it all and reshoot
everything.
It was probably too windy that day. We even had to start over
once because we drifted a couple of blocks down the street between the
first shot and the second.
My client is trying to talk the pilot into a half price charge
for the retake, but at this point I can't be certain that I'm not doing
something wrong. I did shoot down at a -30 to -40 degree angle, trying
to use the good part of the lens more, and trying to get lots of overlap
for the nadir, which isn't normal for me, but I don't think that would
cause the problem.
It looks so bad that I haven't even tried to warp things into
place with Photoshop yet. I've been so spoiled by my Kaidan Quick Pan
III that I've never had to deal with anything this far out of whack
before, so I'm looking to see what I can do to improve it in PTGui
before using Photoshop. (Especially since I also shot panoramas over two
other cities, and those look just as bad as the first one.)
I was surprised to find that even with dozens of control points
per seam and control points on the horizon on all four pictures, the
horizon still got pretty screwed up. It was so bad that I finally
stopped optimizing and just typed in all the pitch and roll values to
level the horizon. I could get a really nice straight horizon that way,
but some buildings end up being misaligned so bad they're a block or two
away from where they should be. I've got twin towers where there should
only be one.
The four JPG's from my Nikon D70/Sigma 8mm are at:
http://www.new-eden.com/temp/Minneapolis.zip
The VR that I get from them, straight out of Enblend, is at:
http://www.new-eden.com/temp/MINNEAPOLISSKYTOUR.MOV
Ed
#removed#
http://www.new-eden.com/
No eternal reward will forgive us now for wasting the dawn.
-- Jim Morrison --
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