Thursday, November 13, 2008

Photosynth Point Clouds -> Topography?

Using the work of BinaryMillenium I grabbed the bin files that were used to generate the photosynth for one of the Easter Island projects (a series of blimp photographs taken along the slope of Rano Rarku, the statue quarry. That synth can be found here: Rano Raraku - Interior Using the python script, I converted the point cloud data into XYZ data and then used Surfer to generate a surface from those points. My goal was to see how well photosynth might be used to generate topographic maps of landscapes. I had to cut out areas where there were spurious points and areas that were not well covered by the photos. Interestingly, the result is pretty good, though Ill have to do more analysis to compare these results with those from other topographic data generation techniques. Very promising! Best of all, photosynth seems to work best the greater the topographic structure -- cases that are tough (and expensive) to map by transit.

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