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you can do it yourself on a 7 year old laptop in real time http://www.robots.ox.ac.uk/~gk/PTAM/

Its a bit hilarious that Microsoft hired PTAM author just to put him in ... MSN software group :D

What's also impressive to me is that Google's solution seems robust, meaning it does a good job in the face of outliers like lens flare, exposure changes, and the like. I see a lot of research with canned results where they optimize for the 6 or so clips they test with, but it's an order of magnitude harder to make it robust enough to release it as GA to the general public.

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