Interactive system with successively activated illumination sources

摘要

An illumination assembly for an interactive input system (20), comprises at least one imaging device (60) capturing image frames of a region of interest; a plurality of illumination sources (84a, 84b, 84c) associated with the imaging device and being located at different positions relative to the imaging device, the illumination sources providing illumination to the region of interest; and a controller (72) communicating with the illumination sources, the controller conditioning the illumination sources so that the illumination sources provide illumination to the region of interest in succession, the timing of image frame capture by the imaging device being coordinated with the illumination pattern of the illumination sources.

主权项

1. An illumination assembly for an interactive input system, comprising:
at least one imaging device capturing image frames of a region of interest; a plurality of illumination sources associated with said imaging device and being located at different positions relative to said imaging device, said illumination sources providing illumination to said region of interest, wherein one illumination source of said plurality is generally vertically aligned with the imaging device and wherein other illumination sources of said plurality are positioned on opposites sides of the imaging device; and a controller communicating with said illumination sources, said controller conditioning said illumination sources so that the illumination sources provide illumination to said region of interest in succession, the timing of image frame capture by said imaging device being coordinated with the illumination pattern of said illumination sources so that during an image sensor exposure cycle, one image frame is captured by the imaging device with only the one illumination source that is vertically aligned with the image device being on, another image frame is captured with all of the illumination sources being off, another image frame is captured with only each other illumination source that is positioned on one side of the imaging device being on and another image frame is captured with only each other illumination source that is positioned on the other side of the imaging device being on.