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Optical Flow (updated to Processing 2.0x)

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This is a technical update of "Optical Flow" by Hidetoshi Shimodaira tweaked to run in Processing 2.0x I only commented out the MovieMaker calls and added a video.start() call. This will not run in javascript because the processing video library does not yet have an HTML5 or pure javascript method for accessing a web camera. To try this, you'll have to download the code and run it in the Processing 2.0 ide. This will not run in Processing 1.x for Processing 1.x the original works well: http://www.openprocessing.org/sketch/10435
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