Single camera system for gesture-based input and target indication
A camera and pointing technology, applied in the input/output process of data processing, instruments, electrical digital data processing, etc., can solve the problems of random starting position and need for feedback, etc.
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[0016] best practice
[0017] see Figure 1A , 1B and 1C, a camera 150 is provided on the platform 110 behind the screen 135 and the aperture 155. Camera 150 may be aimed at a scene in front of the screen so that camera 150 views the scene through aperture 155 . The camera 150 is aimed so that the edge 170 of the aperture 155 is visible in its image. Therefore, the field of view of the camera 150 is slightly omitted by the aperture 155 . Note that in device 200, the purpose of screen 135 is to present four indicia in the form of corners 261-264 of aperture 155, and any means effective for that purpose will suffice. For example, a clear glass with markings or a wire frame object. The addition of lines at the corners, as provided by the rectangular aperture 155 or a wiring frame, is beneficial in terms of sensing, they allow the use of interpolation to identify the coordinates of the four corners and thus increase the coordinate measurement relative to direct measurement of t...
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