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A comment on PointerPointer: points to your cursor.

Re:PointerPointer: points to your cursor by shashashasha on Monday June 11, 2012 @03:50PM (#4096548)
A faster (older) version of this by the same people, with camera flashes: http://flitser.org/
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Re:PointerPointer: points to your cursor by timmaxw on Monday June 11, 2012 @03:57PM (#4096583)
Warning: at least one of the images is not "family-friendly". Are the images automatically collected?
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Re:PointerPointer: points to your cursor by hoprocker on Monday June 11, 2012 @05:17PM (#4097074)
It's probably easier to automate the picture harvesting here via an intensity filter. I'm still stumped about how the finger-recognition was accomplished in the OP.
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