TOUCH SYSTEM AND POINTER COORDINATE DETECTION METHOD THEREFOR

摘要

A pointer coordinate detection method for a touch system includes the steps of: capturing an image window looking across a plate surface with at least one image sensor; identifying a height coordinate of a pointer relative to the touch system according to a variation of each column of pixels in the image window; and calculating a plane coordinate of the pointer relative to the touch system according to an image position of the pointer in the image window. The present invention further provides a touch system.