Topic: Solid Point-cloud view or Allow csv DL

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Fracture (Over 1 year ago)
I'd love to see one of the developers experiment with different ways of presenting the point-cloud.

For example: for every three points are within some given proximity, turn them into a triangle. Mesh the triangles and display them as a surface. Use vertex color blending on the triangle faces. In other words, present the point cloud as a colorized 3d solid surface.

For programmers out there, it would be neat to be able to download the point-clouds as an X/Y/Z coordinate array in XML or CSV. Who knows what someone could come up with.

Could you automatically extract textures from the limited photographs supplied to turn the point-cloud into a reasonably textured 3D model rather than just a somewhat-colourized one? Who knows. I'd love to see what someone could come up with given the data.
Nathanael.Lawrence (Over 1 year ago)
Fracture, you can rest assured that the Photosynth team is continually experimenting with variations of presentation within synths.


-Blaise shows off experimentation, projecting the photos in a synth onto the point cloud, rather than flat geometric planes: (13:55 onward for example):
2007 November 7th:

-Blaise shows off experimentation, using stereo vision algorithms on photos after the initial position approximation is uploaded to generate *dense* point clouds. (49:00 - 51:00)
2009 May 22nd:
(Original point cloud here: )

Re: point cloud -> polygonal mesh question, it's come up a number of times. I'll look up some links for you later tonight.

Re: downloading the point cloud in XML or CSV, I too wish it were that simple. There are hacks to do so.
Fracture (Over 1 year ago)
Thanks for the excellent and detailed reply!
Nathanael (Over 1 year ago)
Fracture, if you haven't already found this elsewhere, I happened to bump into this topic again tonight and thought you'd like to know that one of our fellow synthers, Christoph Hausner, has build a pointcloud downloader which you can download here:

Also relevant to your interests are: 
1) the ARC3D service, located here:

2) research from the University of Washington where Photo Tourism was born:

3) the ability to apply this process to your own photo collections via the relatively new site run out of UW: PhotoCity. Uploading is temporarily shut down until 2010 April 30, and the process of getting started it a little more complex than Photosynth, but the beauty is that you can continue adding photos to a synth and growing it as you please, as well as seeing a dense model.