| 摘要 |
A pointing device having a moveable 3-D shape form 1 with bold visual features 2 is imaged by a television camera 3 to obtain a 2-D electronic image. The electronic image is evaluated by means of computer software in order to extract the visual features and measure their spatial dispositions within the 2-D image. This information enables six degrees of movement of the device to be determined. The movement so determined is applied to a 2-D graphical representation of a virtual 3-D image displayed on a viewing screen of a computer monitor 5, or used to provide pointing information. The shape form 1 may be a cube, sphere (fig 4) or polyhedron (fig 3) with different coloured regions or LED's, or merely an assembly of LED's or the users hand; may be mounted on a base (figs 5-7); or enclosed by a transparent mouse type cover. A second camera (fig 8) may be provided for eclipsed or awkwardly lit features 2.
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