Patent ID: 8269750

Claim:
An optical input system for detecting one or more input positions within an active touch area, comprising: at least three imager modules peripherally positioned around the active touch area, each imager module capturing images of at least one pointing object within the active touch area; and a processor for determining each of one or more input positions, relative to the active touch area, based upon the captured images, wherein the processor triangulating the one or more input positions based upon images captured by a pair of adjacent image modules, and then determining the one or more input positions as being commonly determined from each pair of adjacent imager modules, and wherein the step of determining the positions comprises: determining an X coordinate and a Y coordinate of each position for each pair of images at the position; selecting one of the X-coordinates based upon a highest X-resolution at the position; and selecting one of the Y-coordinates based upon a highest Y-resolution at the position.