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5 October 2006 Single camera 3D measuring for finger pointing in virtual space
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A 3D mouse system is described that can specify the position and movement of the fingertip in a 3D space. When a mouse-moved event occurs to control the 2D object on the screen and the 3D object within the display, a touch panel on the screen can detect the movement of the fingertip. On the other hand, it is necessary to track the fingertip in a space for interaction to the 3D floating object as the touching image appears out in front of the display, serving as a virtual touch panel in the air. A 3D position is generally detected and measured using a stereo viewing. A series of two or more stereo images allows us to obtain the 3D information about the object. However, it is possible to estimate the position of a fingertip using a single image without stereo images. This paper proposes the measuring method of the position of a fingertip using a single camera image. This measuring system can provide 3D information to control 3D virtual objects. The system finds out the tip point and the width of a finger on the image, and approximately calculates the 3D position of a fingertip.
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Hironobu Nakayama and Kunio Sakamoto "Single camera 3D measuring for finger pointing in virtual space", Proc. SPIE 6395, Electro-Optical and Infrared Systems: Technology and Applications III, 639511 (5 October 2006);

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