Forum : Photosynth Lounge

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Topic: Weirdest panorama

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Memoryoke (Over 1 year ago)
Whats the weirdest pano you have seen on Photosynth???

This weird forest is enhanced by the freaky stitching... the trees are coming to get you:
http://photosynth.net/view.aspx?cid=dc9fbe78-267c-47be-ac1d-fd5c8459d672

and...

What is going on between the girders of the Vortex - a twitch in the matrix maybe???

http://photosynth.net/view.aspx?cid=8c06e9f6-5f2e-427a-97fa-c7a392a9749b
amn.hodge (Over 1 year ago)
Wow... Panoramas.... Just- wow. Whatever happened to the REAL photosynth? The one where you could make 3d models from pictures?
Nathanael (Over 1 year ago)
Hi, again, amn.hodge, 

Real Photosynth is still here. Here's the feed of the latest: 
http://photosynth.net/explore.aspx?filter=DateDescending&type=Synth

As far as panoramas go, I know how you feel, but here are a couple of thoughts: 
1: When the majority of newbies try Photosynth for Windows, they only shoot panoramas and then upload them as synths, which doesn't make a good pano or a good synth.
2: A lot more panos are coming in these days because the Photosynth mobile app only makes panoramas. (Phones don't have the RAM to do proper synthing yet.)
3: Panoramas aren't necessarily opposed to photosynths. A panorama is essentially one image. What the Photosynth team is working on is being able to transition among multiple panoramas like we've done between multiple photos in proper Photosynth. Keep track of their progress here: http://bit.ly/readwriteworld
Nathanael (Over 1 year ago)
Memoryoke, sorry to hijack your thread. 

I'm glad you can find an upside to panorama stitching errors, but if you'd like to avoid (or at least minimize) these sorts of stitching error in the future, here are a few basic concepts: 

Panorama stitching is 2D stitching: 
When panorama stitching applications line up photos to form a sphere of photography, their first assumption is that all the photos have been taken from the same exact point in space. 

What I mean is that if you are standing in the forest and you have a tree trunk close to you or an overhanging branch, if you lean back and forth the close tree trunk will line up with different parts of the background. Panorama stitchers don't understand this. When they try to line up all the different things seen in the photos, they will finally have to either choose the edge of the close tree or the trees behind it. Either one will leave rips in the stitching.
Nathanael (Over 1 year ago)
Another way to think about it is that when taking individual shots to stitch into a panorama, you are basically taking a scan of the environment. 

Imagine putting a photo or a document in a scanner and then moving the photo or document around on the scanner bed while the scanner attempts to complete its scan. The result would come out broken and torn. Similarly, moving the camera lens around between input shots for a panorama will result in a error-filled panorama.

Here are a couple of videos which stress the importance of pivoting the camera's lens in place for good panorama results: 
http://www.youtube.com/watch?v=6XYSJPbwBT4&hd=1 http://www.youtube.com/watch?v=svVq7dx_pDY&hd=1

There's also the same point made in the 'bloopers' section of this web log entry: http://styleisviolence.com/photosynth-app/

The reason that amn.hodge is upset is that Photosynth on Windows does 3D stitching, so panos are a step back.

Again, I'm sorry to take your discussion off topic.
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