Re: [hugin-ptx] pto_gen on Debian

[Gerhard Killesreiter]

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Am 15.04.2015 um 16:49 schrieb Emiliano Burgos:
> Hello list, I'm trying to use hugin on a raspberry pi.

Just for fun or is there a use case behind that?

Just curious,
Gerhard


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Re: [hugin-ptx] improved philopod technique for handheld panorama shooting

[Gerhard Killesreiter]

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Am 23.09.2014 um 02:48 schrieb AKS-Gmail-IMAP:
> The idea that has been simmering on my back burner is a laser
> pointer plumb bob and an electronic target having a CdS photocell
> wired to a circuit that produces an audio sound that can indicate
> being on target and being at the same elevation. The idea is that
> one could keep their eyes on the subject while keeping their ears
> on the position.

Funny, I've had a similar idea once!

> On Sep 22, 2014, at 2:58 PM, Bruno Postle 
> wrote:
> 
>> On 22 September 2014 15:17:00 BST, João Carlos Lima wrote:
 
 A Laser solve the problem? Attaching a little laser to the
 lens. Has anyone tried?
>> 
>> I remembered this 'hapala' gadget, but haven't tried it myself:
>> http://panotool.com/panotool/pages/hapalas.html
>> 

Interesting gadget. I think if both lasers were used at the same time
so that they both illuminate the same point below the NPP with an
angle between them _and_ if you can keep the camera itself parallel to
the ground, you could keep the distance to the ground from changing.

Cheers,
Gerhard


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Re: [hugin-ptx] CHDK

[Gerhard Killesreiter]

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Am 14.01.2013 11:39, schrieb paul womack:
> JohnPW wrote:
>> It sounds like it works as advertised, but doesn't alleviate the 
>> usability curse of P&S's — the lack of physical controls makes
>> the UI a deep nest of menus and a bottle neck for changing
>> things. Still, the features you point out, plus being able to use
>> a script to bracket and, most of all, getting RAW file output
>> from a camera that doesn't (normally) have RAW file capability,
>> that sounds pretty good.
>> 
> 
> I used a CHDK script to implement *focus* bracketing (eat your
> heart out, DSLR users)

Is that script available anywhere? I assume you used some additional
setup?

> and got this proof of concept shot:
> 
> http://www.photomacrography.net/forum/viewtopic.php?t=9473&highlight=

Did
> 
you ever make other images?

BTW, when I tried to use CHDK back in 2009, I found that it did drain
a the battery quite fast. That issue is apparently solved now.

Cheers,
Gerhard
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Re: [hugin-ptx] Calibrating lens vignetting

[Gerhard Killesreiter]

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Am 11.10.2012 10:02, schrieb Torsten Bronger:
> Hallöchen!
> 
> I fiddled around with Hugin to generate vignetting calibration
> information, according to 
> .
> It worked, but it was very tedious and difficult to check.  Now, I
> know that it was inaccurate, too.
> 
> I found a much better way now, see 
> .  It doesn't use Hugin
> anymore, but of course the results can be used in Hugin so that it
> can concentrate on fewer parameters.  I calibrated two zoom lenses
> and two primes in half an hour!  Plus you can check the results in
> Gnuplot (Gnuplot scripts are automatically generated).  Have fun
> with it, and please submit your results to the Lensfun project.
> 

That all sounds very intriguing but could you extend the Howto part of
the python script a bit?

Thanks,
Gerhard

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Re: [hugin-ptx] Re: Attitude in EXIF?

[Gerhard Killesreiter]

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Am 09.01.2012 12:26, schrieb Geoff G8DHE:
> Well its never going to be accurate enough to act as a final template, 
> that's to be sure!  The current sensors will give a ±5° which is sufficient 
> to place the image in the rough location, ready for aligning.  But if we 
> don't start he ball rolling then there will never be demand for cheaper 
> more accurate sensors to be provided or used !


I am really wondering if this is worth the effort (regardless whether it
is +- 5% or +- 1%): Won't it be easier to implement that sort of
matching in software based on the image data?

Cheers,
Gerhard
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Re: [hugin-ptx] Re: Problems finding CPs on fisheye photos

[Gerhard Killesreiter]

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Am 03.01.2012 15:04, schrieb Carlos Eduardo G. Carvalho (Cartola):
> Hi,
> 
> well, maybe someone else can help with the automated CPs finding,
> because I really dont use it. I usually put them manually as I also
> has never liked the automated results.
> 
> What I can see is that I have reduced the biggest CP distance to 14
> doing a "everything without translation" optimization. After looking
> to the CPs table (the buttom beside the preview one) and listing CPs
> in order of distance I looked at CP #1, which has the biggest
> distance. The image really looks like having some little parallax
> problem, but I don't really know how does it affects the auto CP
> finding. I usually also don't like CPs over trees and sky, as they
> can move from one shoot to the other. I guess there is a way to
> filter CPs in the sky (celeste) but don't know about automatically
> remove them from trees.

Thanks!

I've re-developed the images from RAW-files and did fix the light
values a bit. After that I got better results (although the CPs were
still only in the bushy area).

> I with we could have an option to specify regions where we would
> like CPs.  Maybe with this an automation would be easier. I am
> almost sure many people do panoramas automatically. In my short
> experience, even when I generated CPs automatically and used them, I
> had to manually remove some, so the automation would not be
> possible. That's why I still do CPs manually.

I can live with removing some points but adding them is too fiddly for
my liking.

> After writing up to this point I decided to try another thing: remove the
> CPs you added manually (20, 21, 22) and reset the project to execute the
> optimization I usually do. I got better results, so, if you have obtained
> the points 1-19 automatically then you can automate it :)

These were indeed obtained automatically.

> I usually do optimizations progressively. I first do a Position (y,
> p, r), and after this I do a (y, p, r, v) and to finish I do an
> "everything without translation". Doing this in your project gave me
> a max distance of 5 pixels and a good final image. I put the project
> attached.

Thanks, with the above optimisation (develop from raw) I got it down
to 2 pts and a reasonable fit. Unfortunately the other images didn't
get aligned. I need to practise taking more photos.

I am now blaming the fact that the CPs aren't in the foreground on
parallax and maybe some blurring. 1/45 should work fine but the
inbuilt pentax share reduction may not have lked the short focal
length.

Cheers,
Gerhard
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Re: [hugin-ptx] 2011.4.0 non generating panorama?!?

[Gerhard Killesreiter]

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Am 03.01.2012 22:08, schrieb paolobenve:
> Hi guys! I'm trying to use hugin 2011.4.0 to generate a panorama.
> 
> In the assistent tab, I load the images, I align them, and then I
> press the "create panorama" button: hugin asks me the project file
> name, then the output prefix, and then nothing happens!
> 
> With previous hugin versions the create panorama button actually
> created the panorama!
> 
> The only thing I see is a pto.mk file in the directory where I
> intended to save the panorama.
> 
> What am I missing?

I don't know your setup, but I've had the same problem. In my case it
was a forgotten version of PTBatcherGUI in /usr/local/bin that didn't
match the libraries I had installed later.

Cheers,
Gerhard
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Re: [hugin-ptx] Re: Problems finding CPs on fisheye photos

[Gerhard Killesreiter]

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Am 03.01.2012 12:27, schrieb kfj:
> On 3 Jan., 12:08, Gerhard Killesreiter 
> wrote:
> 
>> I've tried adding CPs manually but the matching process wasn't really
>> working.
> 
> Do you mean that you had difficulties placing the control points, or
> that the optimizer failed to produce a useful result?

The optimizer did add usefull CPs after some changing of parameters, but
these are clustered in the mid-section of the images. In order to get a
working pano I needed to add additional CPs in the foreground manually.

The optimiser was usually not able to find the point I had added in the
other image and I had to add it manually there too.

After omtimizing the optimizer mostly complained that the distance was
too big.

I even got hugin to crash once...

I was able to stitch in the end, but I don't think it worked out very well.

I suspect that I may have a bit too much parallax error...

It is possible that there's an issue with the exif data too, since my
camera doesn't write the correct data.

I then enter the data manually:
Focal lenght: 6.75
crop factor: 1.5

(that mask could use some explanation which focal length is needed: the
real one or the 35mm equivalent. I think it's the latter).

>> My concern is that I either used the wrong technique to take the
>> photos, my workflow is somehow wrong, or the lens has a defect.
> 
> I suppose there's little you can do wrong taking the images, and I
> also think a lens defect isn't very likely. Leaves your workflow ;-)

Yeah, my suspicion too.

>> Also, I really want to automate this as much as possible as I plan to
>> take lots of panos.
> 
> If you can put your images and PTO online somewhere, I'll have a look
> if I can see what's going wrong.

That'd be great! I'll send you a link in private.

Note that the images are just test images, the idea is not to make a
nice pano from them, the idea is to understand why I don't get CPs in
the front automatically and what I can do to change that.

In this case I have added the CPs 20-22 manually.


Cheers,
Gerhard
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[hugin-ptx] Re: Problems finding CPs on fisheye photos

[Gerhard Killesreiter]

On Jan 2, 7:51 pm, "Carlos Eduardo G. Carvalho (Cartola)"
 wrote:
> Well, I don't know how to fix the CP so you get good CPs, but here I prefer
> to put them manually. If you choose to try this I suggest that you can do
> only 2 CPs between each pair. Try to put them far from each other. I
> usually try to choose one on the bottom and one on the top of the images
> and sometimes I use 3 or 4 CPs. As you have a good hfov you probably will
> have very few image pairs and this wont take too much time. I usually do
> this in 10 images (Opteka 6.5mm in a 1.6 crop censor).

Thanks, Carlos, for your reply.

I've tried adding CPs manually but the matching process wasn't really
working.

My concern is that I either used the wrong technique to take the
photos, my workflow is somehow wrong, or the lens has a defect.

Also, I really want to automate this as much as possible as I plan to
take lots of panos.

Cheers,
Gerhard

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[hugin-ptx] Re: open source close range photogrammetry

[Gerhard Killesreiter]

On 27 Nov., 03:24, luca vascon  wrote:
> http://insight3d.sourceforge.net/
>
> I would invite this guy to join us!!!
>

Where can one join? The website only gived the mail address of the
author.

Also, did anybody get this to run? I managed to compile it on Linux
after some tinkering, but only got a segfault after trying to match
images.

Cheers,
Gerhard

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Re: [hugin-ptx] Can Hugin stitch this?

[Gerhard Killesreiter]

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Gerry Patterson schrieb:

> Here  is
> what I was able to come up with.

That looks pretty good to me!

Thanks a lot for spending that much time with my pics.

>1. loaded the images into hugin and created some (3 or 4) control points
>manually

Ok, I think I understand this.

>2. optimized for positions and XYZ

and that.

>3. checked the "remapped" images under normal and started the stitch

Could I get more explanation here?

>4. I then loaded the images as layers in GIMP and masked in the flower

And here? Especially how you create the mask.

(I am obviously rather new at image processing)

> I tried using the enfuse options for focus stacking, but was
> unsuccessful on the first try.  There might have been options I
> could have fiddled with, but this seems simple to mask in instead.

The pictures weren't taken with stacking/merging in mind, that is
probably why anything automatic won't work.

Only when I looked at the images, I thought that some merging could be
done.

Cheers,
Gerhard
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[hugin-ptx] Can Hugin stitch this?

[Gerhard Killesreiter]

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Hi there,

I've come across two photos that I took and was wondering if Hugin would
be the right tool to "merge" them into one.

The photos have been taken with a small but noticable change in viewing
direction. Due to this and a very shallow DOF there are almost no points
which are sharp in both pictures.

I am mainly interested in getting one picture with both the flower and
the stem of the cactus being sharp, the rest is less interesting.

I've tried using stacking applications (both ALE and CombineZP) without
success. However, I am no pro with either application.

The photos are at:

http://www.freiburger-kakteenfreunde.de/imgp2783.jpg
http://www.freiburger-kakteenfreunde.de/imgp2784.jpg

Cheers,
Gerhard
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