Thanks as always for the excellent help -- I got the images to align by
doing as you said: paying more attention to the CPs. align_image_stack was
finding bad matches, but I was getting fooled when I was checking the
points. Closer inspection revealed that they were bad. I ended up having to
Am 25.07.2018 um 23:09 schrieb Erik Krause:
What I can do is to take some photos while not flying. It will not be
a 360 degrees panoramic but more like 120 to 150 degs, however I can
control the nodal point to a few mm and typical objects are 100+
metres away.
That would certainly help.
...
Am 25.07.2018 um 22:47 schrieb klaus.fo...@gmail.com:
Thank you for looking into it. While I was sure the drone drifted
barely, and as the photos are taken from 100m height I cannot prove
that it is not parallax.
The parallax is clearly visible. See the roof of the house move against
the
Hi Erik,
Thank you for looking into it. While I was sure the drone drifted barely, and
as the photos are taken from 100m height I cannot prove that it is not parallax.
What I can do is to take some photos while not flying. It will not be a 360
degrees panoramic but more like 120 to 150 degs,
Re your sgn(r)*r**2 mapping function. You can realise with a small aperture,
then a lens with r^2 and r^3 terms which maps your incoming theta onto
sgn(theta)×theta^2 and last a lens converting direction to position.
It is doable, even on a turntable. But you'll get sizeable imaging errors as
Am 25.07.2018 um 15:05 schrieb klaus.fo...@gmail.com:
I am using a free service. Downside is that the 2.5 GB will expire there after
48 hours. Files from a Parrot Anafi drone flight are here:
https://mab.to/baXC9ntbt
It would have been easier if you included only the images that belong to
Why holomorphic?
Because a spherical lens surface parametrised as z(x,y) is holomorphic.
Then light refraction according to Snell's law also gives holomorphic funktions
for the rays. All this if course has a finite convergence radius.
Aspherical corrections are usually even polynomials and
Hallöchen!
klaus.fo...@gmail.com writes:
> [...]
>
> But polar corrdinates are slightly peculiar at vector-r=0, and to
> have them differentiable there the function in r must be odd.
> (More general, odd f(r) for f(r)*sin(2n*phi+phi0) and even f(r)
> for f(r)*sin((2n+1)*phi+phi0)
I agree that
Hallo,
Am Mittwoch, 25. Juli 2018 15:05:30 UTC+2 schrieb klaus...@gmail.com:
>
> Hello,
>
> I am using a free service. Downside is that the 2.5 GB will expire there
> after 48 hours. Files from a Parrot Anafi drone flight are here:
>
> https://mab.to/baXC9ntbt
>
A few observations:
1) On import
Hello Erik,
Am Mittwoch, 25. Juli 2018 17:15:19 UTC+2 schrieb Erik Krause:
>
> Am 25.07.2018 um 16:38 schrieb klaus...@gmail.com :
> > Please compute, in cartesian coordinates, the partial derivative
> d^2/dxdx
> > of the 2-dim mapping function with c=1 as parameter.
> > Hint: you'll
Hallo,
Am Dienstag, 24. Juli 2018 22:13:04 UTC+2 schrieb Erik Krause:
>
> Am 24.07.2018 um 21:01 schrieb klaus...@gmail.com :
>
> > I found an old thread on the panotools wiki.
> >
> > https://wiki.panotools.org/User:Klaus/Improving_Hugin
>
> There probably is one problem we didn't consider
Am 25.07.2018 um 16:38 schrieb klaus.fo...@gmail.com:
Please compute, in cartesian coordinates, the partial derivative d^2/dxdx
of the 2-dim mapping function with c=1 as parameter.
Hint: you'll encounter some x/abs(x) - like terms.
In the wiki discussion you write "sqrt() has a
Am Dienstag, 24. Juli 2018 22:37:35 UTC+2 schrieb Erik Krause:
>
> Am 23.07.2018 um 17:26 schrieb klaus...@gmail.com :
>
> > Non-zero parameters a and c introduce singularities at r=0, something a
> real lens does not have.
>
> Since the correction function itself doesn't have a singularity
Hallo,
Am Dienstag, 24. Juli 2018 21:56:16 UTC+2 schrieb Torsten Bronger:
>
> Hallöchen!
>
> klaus...@gmail.com writes:
>
> > I found an old thread on the panotools wiki.
> >
> > https://wiki.panotools.org/User:Klaus/Improving_Hugin
>
> I find the language hard to understand, sorry. Anyway
Hello,
I am using a free service. Downside is that the 2.5 GB will expire there after
48 hours. Files from a Parrot Anafi drone flight are here:
https://mab.to/baXC9ntbt
Feel free to upload some or all files to more permanent storage.
Best regards
Klaus
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