MULTI-TOUCH SYSTEM, TOUCH COORDINATE PAIR DETERMINATION METHOD AND TOUCH COORDINATE PAIR DETERMINATION PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a multi-touch system capable of correctly determining a pair of present and previous multi-touch coordinates even with low sampling rate.SOLUTION: When determining a touch coordinate pair of a touch coordinate which is presently detected and a previously detected touch coordinate based on plural touch coordinates which are presently and previously detected by a touch sensor 11 at a predetermined sampling rate, a controller 12 of a touch device 1 determines a pair of the present touch coordinate and the previous touch coordinate based on the total sum of the distance between the touch coordinates. The touch coordinate pair is determined by calculating a barycentric coordinate among plural touch coordinates which are detected at every sampling time to cancel the present barycentric coordinate and the previous barycentric coordinate. Thus, the touch coordinate pair is correctly determined.