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Basic information about point clouds
Hey,
I was looking for some sort of documentation explaining what exactly point clouds are and why some are coloured while others are just white.
I figure that they are the 3D model the system generates ... onto which the images are slapped on. Regarding the colours, I saw that the denser clouds contain the "real" colour of the environment, but some sparse areas have inaccurate colours (blue for leaves on trees in the background) ...
I really enjoy viewing the synth in their Point Cloud form, but is there any other "use" of the point cloud? Am I missing some greater point here? Don't get me wrong; I love photosynth and browse it every day (and am telling everyone I know about it!)
Can you point me to some information about the basics of photosynth (terms, definitions, "how it works" etc). Academic papers will work too!
Thanks.
I was looking for some sort of documentation explaining what exactly point clouds are and why some are coloured while others are just white.
I figure that they are the 3D model the system generates ... onto which the images are slapped on. Regarding the colours, I saw that the denser clouds contain the "real" colour of the environment, but some sparse areas have inaccurate colours (blue for leaves on trees in the background) ...
I really enjoy viewing the synth in their Point Cloud form, but is there any other "use" of the point cloud? Am I missing some greater point here? Don't get me wrong; I love photosynth and browse it every day (and am telling everyone I know about it!)
Can you point me to some information about the basics of photosynth (terms, definitions, "how it works" etc). Academic papers will work too!
Thanks.
I’m eager to learn
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Inappropriate?Oh! I just found out that point clouds are not something specific to photosynth! http://en.wikipedia.org/wiki/Point_cloud
Wow, can you tell im not from this field? :P
I am still interested in any documentation that might be available regarding the basics of photosynth... (photosynth for dummies)
Thanks.
I’m a conspicuous newbie
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Inappropriate?The real matched points are actually little tiles containing texture information, the points would be the average colour and guessed location where lots of tiles match up.
I would guess the positions are rendered as a point cloud because that's the most efficient way to draw them using Direct3D, and they make a neat tool for exploring the image set.
If you want to understand the algorithms used when creating the synth, there's whitepapers on the University of Washington website-
http://phototour.cs.washington.edu/
