Getting straight and smooth horizons in navcam panoramas |
Getting straight and smooth horizons in navcam panoramas |
Oct 4 2006, 02:55 PM
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#1
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Member Group: Members Posts: 713 Joined: 30-March 05 Member No.: 223 |
Hi all,
I first thought that the problem of uneven horizons in navcam stitches must have been discussed a lot previously but to my surprise the forum search in the Tech&Imagery-board with key-word "horizon" did not yield that much relevant results ... So far, for autostich one "solution" seems to be to try-and-error estimate the correct "greek" orientation parameters (phi,psi,..) However I would like to know if there is a better and more deterministic way. I also played with PTGui/hugin and manual control points on the horizon but this seemed even more cumbersome than getting the right orientation in autostitch. The other problem ar the "edges"/"bumps" along the horizon exactly at the transition zones between individual panorama frames ... Now I am not that an expert in the stitching part of the image processing (jut use Autostitch which does a sufficiently good job, except for the horizon-problem ) so the question goes to the real "stitching Gurus (->Nico, Tman and others ??) how to cope with the horizon :-) Any recommendation for other pano programs that do better with flattening the horizon ? One idea qould be to use some JPL Metadata about the actual rover orientation. I understand that Micheal's MMB program does something like this but was unable to exploit this horizon-information for deriving orientation parameters for external panorama programs. Also, does anyone know if there is already a specification of the lens geometry of the MER navcam available in the form to be usable for a panorama program like hugin etc. ? this would certainly also help to yield undistorted horizons ... Maybe this thread could serve as a collection of useful tips & hints specifically with respect to the "horizon problem" |
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Oct 4 2006, 03:31 PM
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#2
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Senior Member Group: Moderator Posts: 4279 Joined: 19-April 05 From: .br at .es Member No.: 253 |
In addition, I remember to have posted something similar in the Autostitch thread on this same sub-forum about one year ago.
Link: http://www.unmannedspaceflight.com/index.p...ost&p=26418 (but using the first image instead of the second as reference). |
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Oct 4 2006, 03:38 PM
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#3
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Member Group: Members Posts: 713 Joined: 30-March 05 Member No.: 223 |
In addition, I remember to have posted something similar in the Autostitch thread on this same sub-forum. Link: http://www.unmannedspaceflight.com/index.p...ost&p=26418 thanks a lot Tesheiner, very useful information ! (strange that this did not turn up when I searched for "horizon straight" .. |
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