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The new Photosynth

photosynth.net

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Re: The new Photosynth

#72
post #6

Also very impressed here. However, it appears to have a huge limitation over the previous implementation: You can only move in a linear fashion though the scene. Gone is the ability to jump around in a 3D environment. At least from the first handful of examples I looked at. Does anyone see an environment in this new version that still allows freedom of movement?

This isn't really about 3D reconstruction (there exists better solutions for that already, see http://vimeo.com/61625715) rather it seems that it's more about stitching consecutive photos together. If you press C in the demo you'll see that it appears to create different 3D geometry for every photo. This approach allows movement in the scene.

Re: The new Photosynth

#73

WTF, Microsoft: "Your password can't be longer than 16 characters."

same on Office 365 (if you don't use SAML)

Geez, Google, you've limited my passwords to 200 characters. What gives? Microsoft allows passphrases with SAML... though at that point (>200) it might be pass-paragraphs.

Re: The new Photosynth

#74
my college fraternity chapter house is getting demolished and rebuilt this summer. it hit me like a ton of bricks because I have so many college memories there and was saddened I couldn't walk through it in another 20 years. I think i'll have to take a shit ton of pictures so I build a photosynth reconstruction of it :)

Re: The new Photosynth

#75
I don't get what's really cool. Viewport angle and camera path is fixed, than what's really better than just a video? Can let me know the point of this tech?

I tried pressing `c`, but it showed only some cracked images, doesn't seem really meaningful.

Re: The new Photosynth

#76
post #75

I don't get what's really cool. Viewport angle and camera path is fixed, than what's really better than just a video? Can let me know the point of this tech? I tried pressing `c`, but it showed only some cracked images, doesn't seem really meaningful.

Try and take a sequence of ~20 photos (you can see how many photos were taken by counting the dots after you hit `m`), and stitch those into a smooth video to simulate this effect.

The smooth transitioning between the stills is the tech here.

Re: The new Photosynth

#77

A friend wanted to know the nitty gritty details of how this new Photosynth works. I don't work on it, but I saw a talk on it this summer and I've worked on similar projects, so I wrote up all that I know/can speculate. http://kaflurbaleen.blogspot.com/2014/01/whats-up-with-photo...

Cool, I remember it.

Is it possible to release the source code of some of the older projects like the PhotoTour Viewer?

http://phototour.cs.washington.edu/

Re: The new Photosynth

#78
post #65

Another bit of code in this space is libmv: https://github.com/libmv/libmv . libmv's codebase seems to be forked, with an earlier version at goggle code: http://code.google.com/p/libmv/ which also contains an interesting summary of other libraries in the 3D reconstruction space. Blender also has its own fork, which it uses for matchmoving, which is the integration of animated objects into a real world scene. In turn,…

A good place to start is the Photogammmetry forum, there you find info about photosync, bundler, PMS, etc:

http://pgrammetry.com

Re: The new Photosynth

#79
post #70
post #65

Another bit of code in this space is libmv: https://github.com/libmv/libmv . libmv's codebase seems to be forked, with an earlier version at goggle code: http://code.google.com/p/libmv/ which also contains an interesting summary of other libraries in the 3D reconstruction space. Blender also has its own fork, which it uses for matchmoving, which is the integration of animated objects into a real world scene. In turn,…

Sure! My lab focuses on SLAM and 3D reconstruction, especially for robotic applications. We've developed a BSD-licensed C++ (w/ MATLAB wrapper) library with specific applications towards 3D reconstruction problems such as SLAM and structure from motion. It's called GTSAM [1] We actively maintain and release new features as they are published. While we don't provide a full out of the box pipeline (yet!), there are ple…

do you think it would be possible and/or worth it to reconstruct a automotive road course? this is something i've always wanted to do. there's a ton of video online (though usually shot from inside the car.)

the one i spend the most time at is pretty flat, though. i suspect the green hills are hard to get a match on? here is an example: http://www.youtube.com/watch?v=EyZcERAlBeE

Re: The new Photosynth

#80
What's the difference between this and a video.

Given that most cameras nowadays record video this seems rather pointless. Only advantage I can think of is that you can normally record higher quality images with stills vs video.

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