Stitching images of objects on roller table

[Michael Waldegger]

I am shooting downward at a long object that is being moved along a roller table. Each of the 9 images have 30% overlap with the adjacent image. I am not able to generate a suitable stitched image.

I have cropped the images in PT Gui to prevent unwanted control points from forming outside of the object of choice (i.e. the table supporting the rolling object is always in the image).

Can I specify the overlap? Some softwares such as MS I.C.E allo the user to specify the overlap.

[PTGui Support]

Hi Michael,

Is the object flat? If not, then you cannot stitch those images due to
parallax.

If the object is flat and the camera is pointed perpendicular, you
should be able to get a good result by following 6.5:
https://ptgui.com/faq#6_5

If you can't get it to work, make your images available for download and
I'll be happy to take a look.

Kind regards,

Joost Nieuwenhuijse
www.ptgui.com

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[Michael Waldegger]

I had some success thanks to your instructions. But I won't be able to do this for every single series of images. I am hoping to be able to take advantage of the batch stitching.

If I can upload the images I would love it if you could see what you can do.

The images are of a drill core box. There are 8 images. The camera is above, looking down. The core box is moved along a roller table under the camera.

Despite my initial success, I wasn't able to recreate it a second time.

Mike.

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[PTGui Support]

Hi Michael,

You could try this:

- New project
- Load your images
- Click Advanced
- Go to Lens Settings and change the focal length to 1000mm
- Go to Optimizer and change this:
uncheck 'optimize lens focal length'
- File -> Save As Template, choose a suitable name for your template.

You can use the template as follows:
Load your images
File - Apply Template, and pick your template
Align Images

For batch stitching you can use Tools - Batch Builder and select your
template there. Keep in mind that batch stitching may fail if PTGui
fails to find control points for certain images; manual intervention
would be required.

Kind regards,

Joost Nieuwenhuijse
www.ptgui.com

On 1/20/26 18:39, Michael Waldegger wrote:
> I had some success thanks to your instructions. But I won't be able to
> do this for every single series of images. I am hoping to be able to
> take advantage of the batch stitching.
> If I can upload the images I would love it if you could see what you can do.
> The images are of a drill core box. There are 8 images. The camera is
> above, looking down. The core box is moved along a roller table under
> the camera.
>
> Despite my initial success, I wasn't able to recreate it a second time.
>
> Mike.
>
> On Mon, 19 Jan 2026 at 23:26, 'PTGui Support' via PTGui Support
> <pt...@googlegroups.com <mailto:pt...@googlegroups.com>> wrote:
>
> Hi Michael,
>
> Is the object flat? If not, then you cannot stitch those images due to
> parallax.
>
> If the object is flat and the camera is pointed perpendicular, you
> should be able to get a good result by following 6.5:

> https://ptgui.com/faq#6_5 <https://ptgui.com/faq#6_5>

>
> If you can't get it to work, make your images available for download
> and
> I'll be happy to take a look.
>
> Kind regards,
>
> Joost Nieuwenhuijse

> www.ptgui.com <http://www.ptgui.com>

>
> On 1/19/26 20:20, Michael Waldegger wrote:
> > I am shooting downward at a long object that is being moved along a
> > roller table. Each of the 9 images have 30% overlap with the
> adjacent
> > image. I am not able to generate a suitable stitched image.
> >
> > I have cropped the images in PT Gui to prevent unwanted control
> points
> > from forming outside of the object of choice (i.e. the table
> supporting
> > the rolling object is always in the image).
> >
> > Can I specify the overlap? Some softwares such as MS I.C.E allo
> the user
> > to specify the overlap.
> >
> > --
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[PTGui Support]

Michael, apologies, I confused your images with a set of images from
another user that I downloaded around the same time.

For your images I don't think there's a way to stitch these with PTGui
in an automated way. First of all there's depth in your subject, so you
will end up with inevitable stitching faults due to parallax errors.

Secondly PTGui by default attempts to place control points on the static
part of the scene next to the actual subject. You can avoid this by
adding masks.

But the bigger issue is that the control point generator isn't able to
find control points automatically, it just doesn't work for these grey
rock surfaces.

If you have an exact reproducing setup, you could try stitching one
project manually. Then apply it as a template for subsequent stitches
and just skip further alignment. Any difference in shooting conditions
will lead to stitching errors.

Kind regards,

Joost Nieuwenhuijse
www.ptgui.com

[Michael Waldegger]

And stitching manually? Is there a method or procedure for this in PT GUI?

Sent from Outlook for iOS

---

From: 'PTGui Support' via PTGui Support <pt...@googlegroups.com>
Sent: Wednesday, January 21, 2026 2:45:18 AM
To: pt...@googlegroups.com <pt...@googlegroups.com>
Subject: Re: [PTGui] Stitching images of objects on roller table

 

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[PTGui Support]

Hi Michael,

This would involve placing control points by hand on the object.

The problem is your subject is not flat. If you place control points at
different depth, there will be parallax and this will cause stitching
errors and probably a deformed stitch. Likely the resulting object will
not be straight.

Kind regards,

Joost Nieuwenhuijse
www.ptgui.com

On 1/21/26 15:03, Michael Waldegger wrote:
> And stitching manually? Is there a method or procedure for this in PT GUI?
>

> Sent from Outlook for iOS <https://aka.ms/o0ukef>
> ------------------------------------------------------------------------
> *From:* 'PTGui Support' via PTGui Support <pt...@googlegroups.com>
> *Sent:* Wednesday, January 21, 2026 2:45:18 AM
> *To:* pt...@googlegroups.com <pt...@googlegroups.com>
> *Subject:* Re: [PTGui] Stitching images of objects on roller table

> Michael, apologies, I confused your images with a set of images from
> another user that I downloaded around the same time.
>
> For your images I don't think there's a way to stitch these with PTGui
> in an automated way. First of all there's depth in your subject, so you
> will end up with inevitable stitching faults due to parallax errors.
>
> Secondly PTGui by default attempts to place control points on the static
> part of the scene next to the actual subject. You can avoid this by
> adding masks.
>
> But the bigger issue is that the control point generator isn't able to
> find control points automatically, it just doesn't work for these grey
> rock surfaces.
>
> If you have an exact reproducing setup, you could try stitching one
> project manually. Then apply it as a template for subsequent stitches
> and just skip further alignment. Any difference in shooting conditions
> will lead to stitching errors.
>
> Kind regards,
>
> Joost Nieuwenhuijse

> www.ptgui.com <http://www.ptgui.com>

>
> On 1/21/26 09:11, 'PTGui Support' via PTGui Support wrote:
>> Hi Michael,
>>
>> You could try this:
>>
>> - New project
>> - Load your images
>> - Click Advanced
>> - Go to Lens Settings and change the focal length to 1000mm
>> - Go to Optimizer and change this:
>>    uncheck 'optimize lens focal length'
>> - File -> Save As Template, choose a suitable name for your template.
>>
>> You can use the template as follows:
>> Load your images
>> File - Apply Template, and pick your template
>> Align Images
>>
>> For batch stitching you can use Tools - Batch Builder and select your
>> template there. Keep in mind that batch stitching may fail if PTGui
>> fails to find control points for certain images; manual intervention
>> would be required.
>>
>> Kind regards,
>>
>> Joost Nieuwenhuijse

>> www.ptgui.com <http://www.ptgui.com>

>>
>> On 1/20/26 18:39, Michael Waldegger wrote:
>>> I had some success thanks to your instructions. But I won't be able to
>>> do this for every single series of images. I am hoping to be able to
>>> take advantage of the batch stitching.
>>> If I can upload the images I would love it if you could see what you
>>> can do.
>>> The images are of a drill core box. There are 8 images. The camera is
>>> above, looking down. The core box is moved along a roller table under
>>> the camera.
>>>
>>> Despite my initial success, I wasn't able to recreate it a second time.
>>>
>>> Mike.
>>>
>>> On Mon, 19 Jan 2026 at 23:26, 'PTGui Support' via PTGui Support
>>> <pt...@googlegroups.com <mailto:pt...@googlegroups.com <mailto:pt...@googlegroups.com>>> wrote:
>>>
>>>     Hi Michael,
>>>
>>>     Is the object flat? If not, then you cannot stitch those images
>>> due to
>>>     parallax.
>>>
>>>     If the object is flat and the camera is pointed perpendicular, you
>>>     should be able to get a good result by following 6.5:

>>> https://ptgui.com/faq#6_5 <https://ptgui.com/faq#6_5> <https://

> ptgui.com/faq#6_5 <https://ptgui.com/faq#6_5>>
>>>
>>>     If you can't get it to work, make your images available for download
>>>     and
>>>     I'll be happy to take a look.
>>>
>>>     Kind regards,
>>>
>>>     Joost Nieuwenhuijse

>>> www.ptgui.com <http://www.ptgui.com> <http://www.ptgui.com <http://

>>>      > To view this discussion visit https://groups.google.com/d/msgid/ <https://groups.google.com/d/msgid/>
>>>     ptgui/ <https://groups.google.com/d/msgid/ptgui/ <https://groups.google.com/d/
> msgid/ptgui/>>
>>>      > de32df65-3945-40cd-92c4-b00797937472n%40googlegroups.com
>>>     <http://40googlegroups.com <http://40googlegroups.com>> <https://

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> msgid/ptgui/>

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>>
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