PanoTools mailing list archive

Mailinglist:PanoTools NG
Sender:Steinar Midtskogen steinar@...
Date/Time:2015-May-16 18:51:10
Subject:Why do I have to optimise g and t (sheer)?

Thread:


PanoTools NG: Why do I have to optimise g and t (sheer)? Steinar Midtskogen steinar@... 2015-May-16 18:51:10
Hello,

I'm using autooptimiser to map pixel positions to azimuth and altitude.
That is, I'm only using a single image plus a dummy 360x180 degree
equirectangular image (which has a direct mapping between az, alt and x,
y).  I do this by tracking stars, plate solving (star identification)
and use the results as control points.

The result is a .pto file like this: http://voksenlia.net/test/lens.pto

Running autooptimiser like this:

 autooptimiser -n lens.pto -o lens2.pto

gives me a reasonable result, which I've visualised here:

 http://voksenlia.net/test/grid.jpg

However, if I in the lens.pto file above comment out "v g0" and "v t0",
the result is always very bad:

 http://voksenlia.net/test/grid2.jpg

The lens is a (full frame) fisheye lens.  Do the g t parameters have a
special meaning in this case, and must be included in the optimisation?

-- 
Steinar Midtskogen


------------------------------------
Posted by: Steinar Midtskogen <#removed#>
------------------------------------

-- 
<*> Wiki: http://wiki.panotools.org
<*> User Guidelines: http://wiki.panotools.org/User_Guidelines
<*> Nabble (Web) http://panotoolsng.586017.n4.nabble.com/
<*> NG Member Map http://www.panomaps.com/ng
<*> Moderators/List Admins: #removed# 

------------------------------------

Yahoo Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/PanoToolsNG/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/PanoToolsNG/join
    (Yahoo! ID required)

<*> To change settings via email:
    #removed# 
    #removed#

<*> To unsubscribe from this group, send an email to:
    #removed#

<*> Your use of Yahoo Groups is subject to:
    https://info.yahoo.com/legal/us/yahoo/utos/terms/


Next thread:

Previous thread:

back to search page