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Motion Detection as Interaction Technique for Games & Applications on Mobile DevicesIn Pervasive Mobile Interaction Devices (PERMID 2005) Workshop at the Pervasive 2005 (11 May 2005)
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Notes for this articleThe authors describe "projection shift analysis" -- an algorithm for estimating direction of motion in camera phones. PSA is compared to other techniques (block matching, edge tracking, object tracking) and the authors claim PSA to be faster. Also, they note that PSA performs poorly under certain conditions -- particularly in the presence of repeated patterns, on camera phones with low frame rates and so on.
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AbstractMobile devices become smaller and more powerful with each generation distributed. Because of the tiny enclosures the interaction with such devices offers limited input capabilities. In contrast there are hardly any mobile phones purchasable that do not have a built-in camera. We developed a concept of an intuitive interaction technique using optical inertial tracking on mobile phones. The key of this concept is the user moving the mobile device which results in a moving video stream of the camera. The direction of the movement can be calculated with a suitable algorithm. This paper outlines the algorithm Projection Shift Analysis developed to run on mobile phones.
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