APPARATUS AND METHOD FOR DETECTING A POINTER RELATIVE TO A TOUCH SURFACE

摘要

An apparatus (50) for detecting a pointer relative to a touch surface (54, 254, 354) includes at least two spaced imaging assemblies (58) having overlapping fields of view encompassing the touch surface. The imaging assemblies see the touch surface in three-dimensions as a perspective view. The imaging assemblies acquire overlapping images from different locations. A processor (60) receives and processes image data generated by at least one o f the imaging assemblies to determine the location of the pointer relative to the touch surface.