sven,

E-mail me privately with a set of example photos, and i'll take a peek at them 
and see if there is a solution.

Dale





> Date: Thu, 25 Nov 2010 07:17:06 -0800
> Subject: [hugin-ptx] Re: Linear projection
> From: _...@yahoo.com
> To: hugin-ptx@googlegroups.com
> 
> 
> 
> On 24 Nov., 19:05, A319 <sven.steu...@googlemail.com> wrote:
> > We took about 150 pictures
> > along 10 parallel routes (10 series of pictures) out of the window.
> 
> Looking at your images, I notice that they are quite distorted. It
> looks as if you had actually taken them through a window, and probably
> a not very plane one. With starting material like that, the control
> point generators are having a very hard time. If you have to take
> aerial photogaphs through a window, make sure you always hold the
> camera as close to the pane as possible and set the camera to infinite
> distance (pocket cameras often have a little 'mountains' symbol for
> that). If there is a pane, though, and you try to photograph
> downwards, you hit the pane at a shallow angle, creating bad
> distortions. Ideally you'd have the camera pointing straight down
> without a pane in between; I realize this may not be feasible, but
> with a pane in between your images become very hard to process at all.
> What I don't understand about your images is why they are all
> different sizes. This confuses the optimizer, since it tries to create
> different fields of view etc. for every image. Best to leave them as
> you get them out of the camera - if there are any artifacts in them
> (plane's wings etc.) it's easy to exclude them using the masking
> feature.
> If at all possible, all the images should be taken with similar yaw
> and pitch, to allow initial optimization of X,Y and Z  inside the
> strips with the pitch and yaw set to estimated figures. So if you can,
> just mount the camera and leave it like that. If you have a camera
> that you can remote-control, you can mount it on the plane pointing
> straight down and control it from inside the plane. Try using short
> exposure times (if you can't set the exposure time, use a high ISO
> setting) to minimize distortions due to vibrations.
> Finally, you should take the images in regular time intervals and try
> to create sufficient overlap between them, I found your images don't
> always overlap sufficiently.
> 
> > As you can see, there are serval problems with the highway. What you
> > can not see are errors in the forest.
> 
> I see the biggest problem in the pictures. I doubt you'll find any
> tool to get a decent output from that batch. With a lot af handwork
> you'll approach a solution, but it will be far from optimal. I
> recommend you do another take.
> 
> with regards
> Kay
> 
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