PanoTools NG:
RE: FW: calibrating a lens/teleconverter combo using PTGui
Yoram Bernet 2007-Dec-31 19:31:53
Thanks all for your help...
So, Jim... I've followed your pointers here. I have the two images in the
control point tab. I entered three series of points:
5 points on one line (type set to 'line 3')
5 on another line (type set to 'line 4')
and 5 on the last line (type set to 'line 5').
I ran the optimizer and got the report that the average control point
distances are all '0' and that this is "too good to be true" :-). Also,
FoV=39.12, a=3.02, b=7.789 and c=1.411.
When I looked at the preview, my image was tiny, inverted and bore a strange
resemblance to the source, yet had all sorts of weird lines swapped. Those
lines that were identifiable were very straight.
Could it be that I am setting CPs wrong?
I set CPs by clicking in one pane, then accepting the PTGui suggestion for
the other pane. I do this for five points along what should be a straight
line, name them all 'line N', then move on to set the CPs for the next line.
I'm baffled...
Y
-----Original Message-----
From: Jim Watters [mailto:#removed#]
Sent: Friday, December 28, 2007 6:22 PM
To: Yoram Bernet
Subject: Re: FW: [PanoToolsNG] calibrating a lens/teleconverter combo using
PTGui
On the Control Point tab you should have the same image on both the left
and right.
in the CP type drop down list you should have the option to choose "New
Line (t3)"
It should show up in the list of points on the right side as Line 3, if
not right click on the type and correct using the pop-up menu.
You need to add at least 4 points to make a line.
To add points to a new line, change CP type to New Line (t4)
Shift lenses are a little different to calibrate compared to others.
The way panotools works you will end up will different values for
different shifts if you do not modify the size of the image.
One way to compensate for this is to create a canvas that is larger and
place the image into the correct spot.
See http://www.epaperpress.com/ptlens/ Shift lens
I am pretty sure there is an article in the wiki that I can not find
that has more up to date images.
Best of luck. Give it a another try. Continue to post to the group with
your questions.
Jim
Yoram Bernet wrote:
>
> Thanks Jim.
>
> I feel like I'm flying by the seat of my pants here. It may be that I
> just need to spend a weekend reading more of the related documents in
> further depth. In any case, here goes:
>
> In PTGui, menu - Tools | Options | Panotools
> Ensure PTStitcher / Nora / PTMender application is correct.
>
> */[/**/Yoram Bernet/**/] /*
>
> */It was blank. I gave it the path to ptstitcher.exe but not sure if
> this is right./*
>
>
> In PTGui on Optimizer tab, Optimize using : "Panorama Tools Optimizer"
>
> If this does not work send me the images directly so I can see.
>
> */[/**/Yoram Bernet/**/] Here are the 2 guis (the first is the one I
> have. The 2^nd is from the tutorial):/*
>
> *//*
>
> *//*
>
> I started out trying to derive the coefficients to calibrate a lens
> combo. As an interim step, I'm just trying to take an image and
> correct it based on a couple of known straight lines in the image. I'm
> trying to do so by following Erik's tutorial
> (http://erik-krause.de/index.htm?./verzeichnung/distort_en.htm).
>
> If I need to just do a lot more studying before bugging you for help -
> let me know. Regardles, I really appreciate your assistance. I'm about
> to log off for the w/e.
>
> Happy New Year!
>
> Yoram
>
> Jim
>
> Yoram Bernet wrote:
> > Erik and Jim Watters, thanks to you both.
> >
> >
> >
> > I'm still stuck. I am following the tutorial that Erik pointed me
> towards.
> > I've downloaded the latest pano12.dll that Jim pointed me towards
> and yet I
> > seem to have a substantially different version of the Gui than the
> one in
> > the tutorial. In particular, it does not allow me to designate control
> > points of type 'Line' (just vertical or horizontal line) and
> miscellaneous
> > other differences. Here's the gui that the tutorial shows:
> >
> >
> > and here's the gui that I have:
> >
> >
> > Obviously, I have a different version of (probably) PTGui. I'm running
> > version 7.5 (according to the 'Help/About'.
> >
> >
> > ANy suggestions on how I can get the straight line control points out of
> > this version of PTGui? Or alternatively - how do I get the version
> of PTGui
> > that supports the slcps?
> >
> >
> > Many thanks and my apologies for the noise on the list. Hopefully -
> this is
> > useful to others as well.
> >
> >
> >
> > Yoram
> >
> >
> >
>
> --
> Jim Watters
>
> Yahoo ID: j1vvy ymsgr:sendIM?j1vvy
> jwatters @ photocreations . ca
> http://photocreations.ca <http://photocreations.ca>
>
>
>
> ------------------------------------------------------------------------
>
>
--
Jim Watters
Yahoo ID: j1vvy ymsgr:sendIM?j1vvy
jwatters @ photocreations . ca
http://photocreations.ca
--
<*> Wiki: http://wiki.panotools.org
<*> User Guidelines: http://wiki.panotools.org/User_Guidelines
<*> Nabble (Web) http://www.nabble.com/PanoToolsNG-f15658.html
<*> 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:
mailto:#removed#
mailto:#removed#
<*> To unsubscribe from this group, send an email to:
#removed#
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/