Impossible to stitch panorama  

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igvk
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Impossible to stitch panorama

by igvk » Sun Sep 06, 2015 2:50 pm

Hello,
I tried Autopano to make a circular panorama, but somehow it became impossible to stitch it correctly.
Each image has links to neighboring ones, but the result of optimization is very strange - it wraps the panorama twice around the circle, and all the images become overlapped.
I have uploaded part of it with 46 images recompressed to make the size smaller:
http://www.mediafire.com/download/moucv ... meskoe.zip
K.jpg

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Re: Impossible to stitch panorama

by marzipano » Sun Sep 06, 2015 3:37 pm

I just downloaded your images and it stitched OK to a 360 pano of 67833 x 9639 pixels and did not do the double-wrapping that was in your example. I used APG 4.2

I did notice that 00436 and 00437 link wasn't spotted by APG and had to be added manually

I also noticed that your overlap was much much too big (100% in 406 and 407) and this can lead to stitching problems. IIdeally it should be about 20%

best
Martin

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Re: Impossible to stitch panorama

by igvk » Sun Sep 06, 2015 3:46 pm

Ok, I see. Thank you for the experiment - I didn't do it, sorry!
Did you try to open the .pano project?
Actually, I made it from a larger panorama by deleting images when trying to fix the problem.
I noticed that the images I uploaded indeed stitch well from scratch.
But is it possible to fix the current project or do I need to start again? What is the reason of optimization not working when you already edit this project?

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Re: Impossible to stitch panorama

by marzipano » Sun Sep 06, 2015 7:40 pm

When I used your pano control file I got the same overlapping result and a RMS of 5.5

However, if you just select only the images that give a reasonable overlap and not all the duplicates you end up with 29 images instead of 46 and this gives a RMSM of 2.6 and a good 360 degree image

So I think it's the fact you had too many duplicates with almost 100% overlap in you image set and also the duplicates contained quite a lot of movement of people in them (makes the job harder for APG) so you ended up just confusing APG

The screen shots of my 29 images are below - I used your samples and your pano file

best
Martin
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apg2.jpg
apg1.jpg

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Re: Impossible to stitch panorama

by igvk » Sun Sep 06, 2015 8:00 pm

Thank you for your answer, marzipano!
I actually ended up restarting the whole panorama from scratch, because I couldn't fix the problem.
I threw away known bad images, but left lots of overlapping ones (I actually need them to remove objects/people).
With some extra work, I got a good stitched panorama, without this double-wrapping effect.
It seems to me that APG couldn't recover from some state the project was in, but it in fact behaved very good with stitching lots of almost fully overlapping images with moving objects.

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Re: Impossible to stitch panorama

by mediavets » Sun Sep 06, 2015 8:34 pm

igvk wrote:I threw away known bad images, but left lots of overlapping ones (I actually need them to remove objects/people).


???????????????

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Re: Impossible to stitch panorama

by igvk » Sun Sep 06, 2015 8:46 pm

I'll try to explain:
Some images have parts of moving objects that I don't want to keep.
Some images have people in them that are too close to the camera, and I want to remove them.
And I want to keep interesting objects not obstructed with people or objects.
To have more freedom in removing all of these, I choose to have more redundant images in panorama.

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Re: Impossible to stitch panorama

by marzipano » Sun Sep 06, 2015 8:59 pm

yes I understand I think - you take the same or almost the same image several times hoping to get all the background exposed that you want to keep in the overall aggregate

Very "pot luck" though if the results are random in that you may get people in the same place each time - and a nightmare in masking !

Martin

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Re: Impossible to stitch panorama

by igvk » Sun Sep 06, 2015 9:13 pm

It all depends on density of people per square meter, so to speak.
Actually, I don't want to get rid of them altogether, just to not have them close to the camera and obstructing too much of view.
In this case, on next pass I just made shots of surroundings that were almost free of people.
The result depends on luck, but on practice it's more than ok.

Here is the resulting panorama (quality reduced to fit here):
Kolomenskoe-Pano.jpg

The sky is poorly stitched on the left, I didn't manually edit it.
Hope it's appropriate to post the result here.

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Re: Impossible to stitch panorama

by gkaefer » Fri Sep 11, 2015 2:14 pm

why not using ND filter... one image 10seconds up to a muinute or so... no single person or other moving objects...
... no post selection of images nor postghosthandling needed....
Georg

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Re: Impossible to stitch panorama

by igvk » Fri Sep 11, 2015 2:25 pm

There was no aim to totally get rid of people or moving objects in the picture.
And, some of them were present in mostly one place for more than a minute.
Still, this solution could be used in some circumstances and when there is plenty of time to shoot and the lighting doesn't change much from start to end. But I doubt that I could easily use it for this panorama.


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