Re: [hugin-ptx] Re: Lens correction with Hugin

2018-06-12 Thread Robert Lounsberry 
I'm really comfortable making corrections with horizontal lines. Based on
Torsten's tutorial I translated to the new version of Hugin and where the
image jumps after you make a control point. In a horizontal image you just
know that you can click on both sides of the image just at the inside edges
and continue. That's where he says "you can just turn your brain off" in
the tutorial video. In an image where the subject is vertical or angled
lines, I'm not sure how that would work. The corrections I get from
multiple horizontal lines seem to work fine for everything, but I want to
understand how to use vertical or oblique lines.

Torsten, I emailed you a couple times. I'm looking to contribute by making
corrections for user submissions.

Thanks everyone for the assistance.

On Thu, May 17, 2018 at 5:13 PM, Frederic Da Vitoria 
wrote:

> 2018-05-17 22:45 GMT+02:00 Robert Lounsberry :
>
>> I was asking that if I had to also use vertical lines, how would I line
>> them up on top of each other like two portrait orientation images and match
>> a vertical line top to bottom. Since I don't have to use vertical lines and
>> can use only horizontal lines then it's a moot question. I just wasn't sure
>> how to, if I had to. Thank you.
>>
>> On Thu, May 17, 2018 at 4:38 PM, Torsten Bronger <
>> bron...@physik.rwth-aachen.de> wrote:
>>
>>> Hallöchen!
>>>
>>> Robert Lounsberry writes:
>>>
>>> > Just to make sure I understand correctly, you don't need to do
>>> > both vertical and horizontal lines to create a proper lens
>>> > distortion correction. You only need to use horizontal
>>> > linesright?
>>>
>>> Yes, because they are longer usually.
>>>
>>> > And if you do need to do vertical lines, how would you line them
>>> > up in Hugin since they wouldn't be touching like in horizontal
>>> > test images.
>>>
>>> I don't understand this.  You need to do vertical lines becasue you
>>> have a test image in portrait mode?  Or because the subject only had
>>> vertical lines?
>>>
>>> Tschö,
>>> Torsten.
>>>
>>> --
>>> Torsten Bronger
>>>
>>
> I may be wrong, but I believe you shouldn't set lines as horizontal or
> vertical in Hugin for calibration. Just declare them as "normal" lines, no
> matter if they are actually vertical or horizontal. I guess it could help
> calibration if you find vertical lines as well as horizontal. For that
> matter, you could use oblique lines too.
>
> --
> Frederic Da Vitoria
> (davitof)
>
> Membre de l'April - « promouvoir et défendre le logiciel libre » -
> http://www.april.org
>
> --
> A list of frequently asked questions is available at:
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Re: [hugin-ptx] Re: Lens correction with Hugin

2018-05-17 Thread Frederic Da Vitoria 
2018-05-17 22:45 GMT+02:00 Robert Lounsberry :

> I was asking that if I had to also use vertical lines, how would I line
> them up on top of each other like two portrait orientation images and match
> a vertical line top to bottom. Since I don't have to use vertical lines and
> can use only horizontal lines then it's a moot question. I just wasn't sure
> how to, if I had to. Thank you.
>
> On Thu, May 17, 2018 at 4:38 PM, Torsten Bronger <
> bron...@physik.rwth-aachen.de> wrote:
>
>> Hallöchen!
>>
>> Robert Lounsberry writes:
>>
>> > Just to make sure I understand correctly, you don't need to do
>> > both vertical and horizontal lines to create a proper lens
>> > distortion correction. You only need to use horizontal
>> > linesright?
>>
>> Yes, because they are longer usually.
>>
>> > And if you do need to do vertical lines, how would you line them
>> > up in Hugin since they wouldn't be touching like in horizontal
>> > test images.
>>
>> I don't understand this.  You need to do vertical lines becasue you
>> have a test image in portrait mode?  Or because the subject only had
>> vertical lines?
>>
>> Tschö,
>> Torsten.
>>
>> --
>> Torsten Bronger
>>
>
I may be wrong, but I believe you shouldn't set lines as horizontal or
vertical in Hugin for calibration. Just declare them as "normal" lines, no
matter if they are actually vertical or horizontal. I guess it could help
calibration if you find vertical lines as well as horizontal. For that
matter, you could use oblique lines too.

-- 
Frederic Da Vitoria
(davitof)

Membre de l'April - « promouvoir et défendre le logiciel libre » -
http://www.april.org

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Re: [hugin-ptx] Re: Lens correction with Hugin

2018-05-17 Thread Robert Lounsberry 
I was asking that if I had to also use vertical lines, how would I line
them up on top of each other like two portrait orientation images and match
a vertical line top to bottom. Since I don't have to use vertical lines and
can use only horizontal lines then it's a moot question. I just wasn't sure
how to, if I had to. Thank you.

On Thu, May 17, 2018 at 4:38 PM, Torsten Bronger <
bron...@physik.rwth-aachen.de> wrote:

> Hallöchen!
>
> Robert Lounsberry writes:
>
> > Just to make sure I understand correctly, you don't need to do
> > both vertical and horizontal lines to create a proper lens
> > distortion correction. You only need to use horizontal
> > linesright?
>
> Yes, because they are longer usually.
>
> > And if you do need to do vertical lines, how would you line them
> > up in Hugin since they wouldn't be touching like in horizontal
> > test images.
>
> I don't understand this.  You need to do vertical lines becasue you
> have a test image in portrait mode?  Or because the subject only had
> vertical lines?
>
> Tschö,
> Torsten.
>
> --
> Torsten Bronger
>
> --
> 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
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> msgid/hugin-ptx/87y3gi9fw6.fsf%40wilson.bronger.org.
> For more options, visit https://groups.google.com/d/optout.
>

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Re: [hugin-ptx] Re: Lens correction with Hugin

2018-05-16 Thread Robert Lounsberry 
Thank you very much. I was working toward what seems an impossible end.
Disregarding the difference in the numbers, I was finally able to arrive at
the proper corrections for the 16 and 20mm focal lengths for the zoom lens
I'm testing. Thank you very much for your help and kindness.

Best regards,
Robert Lounsberry

On Wed, May 16, 2018 at 4:10 PM, Torsten Bronger <
bron...@physik.rwth-aachen.de> wrote:

> Hallöchen!
>
> Robert Lounsberry writes:
>
> > [...] Is that a realistic goal? To be able to get close to those
> > numbers?
>
> Even without having looked at the video yet I can say: No.  Very
> different coefficients can yield rather similar functions in the
> respective interval.  The actual question is whether your
> coefficients lead to a good-looking correction.
>
> Tschö,
> Torsten.
>
> --
> Torsten Bronger
>
> --
> A list of frequently asked questions is available at:
> http://wiki.panotools.org/Hugin_FAQ
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