Re: [hugin-ptx] [Request]: Resolve confusion between "Distance" and "Correlation"

[Greg 'groggy' Lehey]

On Monday,  8 February 2021 at 21:28:45 -0600, dgjohnston wrote:
> Before I use hugin I usually use DxO PhotoLab to correct for lens
> and camera body distortion.

Yes, I do that too.

> Does anyone know if DxO uses the Brown-Conrady lens model for their
> routines or anything similar?

The DxO developers will know.  Why don't you ask a question of
support?

Greg
--
Sent from my desktop computer.
Finger groog...@gmail.com for PGP public key.
See complete headers for address and phone numbers.
This message is digitally signed.  If your Microsoft mail program
reports problems, please read http://lemis.com/broken-MUA

-- 
A list of frequently asked questions is available at: 
http://wiki.panotools.org/Hugin_FAQ
--- 
You received this message because you are subscribed to the Google Groups 
"hugin and other free panoramic software" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to hugin-ptx+unsubscr...@googlegroups.com.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/hugin-ptx/20210209041126.GE6168%40eureka.lemis.com.


signature.asc
Description: PGP signature

Re: [hugin-ptx] [Request]: Resolve confusion between "Distance" and "Correlation"

[dgjohnston]

Before I use hugin I usually use DxO PhotoLab to correct for lens and camera 
body distortion. Does anyone know if DxO uses the Brown-Conrady lens model for 
their routines or anything similar?

In the wikipedia entry for “Distortion” there is one comment about this:
DxO Labs ' Optics Pro can correct 
complex distortion, and takes into account the focus distance.

Optics Pro was renamed to PhotoLab in a previous release.

Also look at DxOMark the company that does the lens and camera testing to 
create the correction modules for lens-camera pairs.

Don J.

> On Feb 8, 2021, at 7:07 AM, Klaus Foehl  wrote:
> 
> On 31.01.21 19:15, 'ChameleonScales' via hugin and other free panoramic 
> software wrote:
> 
>> I assemble natural landscape panoramas which have to be stitched as 
>> precisely as possible.
> 
> Maybe you are aware that hugin implements only a small number of distortion 
> parameters from the Brown-Conrady lens model. Higher order physical lens 
> distortions are unaccounted for.
> 
> Does hugin so far satisfy your precision requirements?
> 
> Best regards
> 
> Klaus
> 
> -- 
> A list of frequently asked questions is available at: 
> http://wiki.panotools.org/Hugin_FAQ
> --- You received this message because you are subscribed to the Google Groups 
> "hugin and other free panoramic software" group.
> To unsubscribe from this group and stop receiving emails from it, send an 
> email to hugin-ptx+unsubscr...@googlegroups.com.
> To view this discussion on the web visit 
> https://groups.google.com/d/msgid/hugin-ptx/e1c1e6cc-366d-cfe7-0cbb-1d53d712f848%40gmail.com.

-- 
A list of frequently asked questions is available at: 
http://wiki.panotools.org/Hugin_FAQ
--- 
You received this message because you are subscribed to the Google Groups 
"hugin and other free panoramic software" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to hugin-ptx+unsubscr...@googlegroups.com.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/hugin-ptx/4D7759D3-60F7-4E9B-AB26-F9D3E2BB401A%40accesscomm.ca.

Re: [hugin-ptx] Re: [Request]: Resolve confusion between "Distance" and "Correlation"

['ChameleonScales' via hugin and other free panoramic software]

Or perhaps more simply vector arrows on each control point, with direction and 
magnitude.
I have a CGI brain so I thought "vector map" with colors but actually arrows 
would be much easier to program and work just fine.

-- 
A list of frequently asked questions is available at: 
http://wiki.panotools.org/Hugin_FAQ
--- 
You received this message because you are subscribed to the Google Groups 
"hugin and other free panoramic software" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to hugin-ptx+unsubscr...@googlegroups.com.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/hugin-ptx/WxZJhrqrSPwfMTMMPtnABQ1i6-znydBRoHQ1bw7jNRE65nvGq2fQ7y4AdtnK6fye_db4JFWVBztwK9uUFuzCAUMNsiMXs2G8HjoizEbBzXg%3D%40protonmail.com.

Re: [hugin-ptx] Re: [Request]: Resolve confusion between "Distance" and "Correlation"

['ChameleonScales' via hugin and other free panoramic software]

> Maybe you are aware that hugin implements only a small number of
distortion parameters from the Brown-Conrady lens model

Yes, I remember you told me here 
https://groups.google.com/g/hugin-ptx/c/ERSQCxkbxkw/m/hFZmxWOwAwAJ

> Does hugin so far satisfy your precision requirements?

At least if a panorama lacks precision it's due to either the wind or the 
camera not being properly calibrated so I don't think a more complete lens 
model would make much of a difference.

It's more a matter of manipulating control points efficiently.
Sometimes an iterative "optimize > select by distance > delete > optimize, 
etc..." converges towards the wrong objects and by the time I realize there is 
an issue I have to either restart by eliminating the right CPs from the 
beginning or just place some CPs manually.

I'm mostly looking for an efficient workflow to determine early on whether 
there is parallax or large moving/deforming objects.

Thinking of it, something that would be totally awesome is a vector map 
overlay, showing the distance between control points and the direction towards 
their corresponding one. This way you could immediately see from the first 
optimization if and which objects are moving relative to each other and decide 
what to do about that.

Does that seem like a good idea to you?

-- 
A list of frequently asked questions is available at: 
http://wiki.panotools.org/Hugin_FAQ
--- 
You received this message because you are subscribed to the Google Groups 
"hugin and other free panoramic software" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to hugin-ptx+unsubscr...@googlegroups.com.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/hugin-ptx/UQraqx2UIADm5fmSOcuYvktOLtOpSVq6qt8yUs1ejicraO3UUj17EsnN95A1gqWM4V0ps77J-myqx3EwbB7M-fE9RdDqYQKMNZRnkyyHBak%3D%40protonmail.com.

Re: [hugin-ptx] New release for mac?

[Bob Campbell]

When building exiv2.  Maybe because I have the build target set to 10.13?  I’m 
building exiv2-0.27.2 - haven’t checked if that’s the most recent release.


> On Feb 6, 2021, at 6:43 AM, Niklas Mischkulnig  wrote:
> 
> No, it works for me (just running build-all.sh). Does that happen when 
> building Hugin or exiv2?
> 

-- 
A list of frequently asked questions is available at: 
http://wiki.panotools.org/Hugin_FAQ
--- 
You received this message because you are subscribed to the Google Groups 
"hugin and other free panoramic software" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to hugin-ptx+unsubscr...@googlegroups.com.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/hugin-ptx/3CF491DC-4301-49DE-AF57-38B14613A7BF%40gmail.com.

Re: [hugin-ptx] Trying to use Hugin, and...

[Robert Krawitz]

On 2/8/21 8:13 AM, Monkey wrote:
> 
> Thanks for trying. That is about as good as I would have expected from the 
> input images. I had
> another go myself, starting from scratch and placing the images manually 
> before running optimise.
> 
> Once I'd run optimise, however, the images weren't displaying properly in the 
> preview again. Does
> anyone know why this happens? Is it an OpenGL problem?

They display properly in the "slow" preview (I've seen this for years).  It 
only seems to happen (to
me, at least) stitching images using a very wide angle lens; using a normal or 
moderately wide lens,
even with a very wide panorama, is fine.

> Some images turn into jagged strips, some don't appear at all (they do appear 
> in the little "sphere"
> preview to the left).

Yup, same symptoms.  It makes fine grained control over output challenging.

-- 
A list of frequently asked questions is available at: 
http://wiki.panotools.org/Hugin_FAQ
--- 
You received this message because you are subscribed to the Google Groups 
"hugin and other free panoramic software" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to hugin-ptx+unsubscr...@googlegroups.com.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/hugin-ptx/78ceb365-1b72-8e3f-6323-bb2e83047f18%40alum.mit.edu.

Re: [hugin-ptx] Trying to use Hugin, and...

[Monkey]

Thanks for trying. That is about as good as I would have expected from the 
input images. I had another go myself, starting from scratch and placing 
the images manually before running optimise.

Once I'd run optimise, however, the images weren't displaying properly in 
the preview again. Does anyone know why this happens? Is it an OpenGL 
problem?

Some images turn into jagged strips, some don't appear at all (they do 
appear in the little "sphere" preview to the left).


On Monday, 8 February 2021 at 06:48:03 UTC m.l...@up.ac.za wrote:

> Hallo Monkey,
>
> Sunday, February 7, 2021, 10:18:40 PM, you wrote:
>
> > The project is supposed to be a 360x180, with 7 images taken
> > horizontally, one up, and one down. I haven't bothered trying to
> > connect the sky image, but I've given the others a handful of
> > control points (I'm not bothered about getting a great alignment;
> > just a rough one is fine). Hugin seems to be insisting on putting
>
> I don't have experience in stitching very wide angle images. The few
> that I have tried has not worked at all. This is what I was able to
> produce, but left out the sky and feet image. I also rotated the
> images before stitching. This makes the placement of control points
> and alignments much easier.
>
> The overlap between the images are just not enough to get anything
> better, although some of the others on the group could correct me.
>
> Groetnis
> Marius 
> mailto:marius...@up.ac.za
> BMedSci (Hons) UP, PGCHE (UP) HCM (FPD)
>
> add some chaos to your life and put the world in order
> http://www.chaos.co.za/
>
> Hierdie boodskap en aanhangsels is aan 'n vrywaringsklousule 
> onderhewig. Volledige besonderhede is by 
> www.it.up.ac.za/documentation/governance/disclaimer/ 
> beskikbaar.
> -- 
> This message and attachments are subject to a disclaimer.
>
> Please refer to 
> http://upnet.up.ac.za/services/it/documentation/docs/004167.pdf 
>  for
> full 
> details.
>

-- 
A list of frequently asked questions is available at: 
http://wiki.panotools.org/Hugin_FAQ
--- 
You received this message because you are subscribed to the Google Groups 
"hugin and other free panoramic software" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to hugin-ptx+unsubscr...@googlegroups.com.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/hugin-ptx/70481e69-c098-485d-acff-034dd24ee8b6n%40googlegroups.com.

Re: [hugin-ptx] Re: [Request]: Resolve confusion between "Distance" and "Correlation"

[Klaus Foehl]

On 31.01.21 19:15, 'ChameleonScales' via hugin and other free panoramic 
software wrote:


I assemble natural landscape panoramas which have to be stitched as 
precisely as possible.


Maybe you are aware that hugin implements only a small number of 
distortion parameters from the Brown-Conrady lens model. Higher order 
physical lens distortions are unaccounted for.


Does hugin so far satisfy your precision requirements?

Best regards

Klaus

--
A list of frequently asked questions is available at: 
http://wiki.panotools.org/Hugin_FAQ
--- 
You received this message because you are subscribed to the Google Groups "hugin and other free panoramic software" group.

To unsubscribe from this group and stop receiving emails from it, send an email 
to hugin-ptx+unsubscr...@googlegroups.com.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/hugin-ptx/e1c1e6cc-366d-cfe7-0cbb-1d53d712f848%40gmail.com.