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CamBall

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Published on 6 Dec 2008

CamBall is an experiment I developed that allows the user to interact with a virtual ball, using only moderate hardware, a cheap webcam, several computer vision-techniques and a simple physics simulation. To set it up, a reference human-free image is first captured in its calibration phase. After that, the application processes the live images from the webcam at a steady 30 fps. Each frame is compared to the reference image, marking pixels that are different. After some additional cleanup image processing techniques, the result was thresholded and used as a binary 2D image input to a physics simulator to simulate the ball. The ball is then rendered on top of the live feed. The Windows application was written in C++ and used the OpenCV library. See http://www.decarpentier.nl/camball for downloads and more info.

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