A Design of Low Cost Infrared Multi-touch System

This paper discusses a implementing scheme of infrared multi-touch system. In this scheme, we first employ a preprocessing which combined mean-median filter with weighted recursive filter. And then the algorithm of mass center is adopted to get the precise position where users touched. Afterwards, we discuss a gesture identification method for multi-touch which is suitable for infrared touch panels. At last, we set up a experiment platform based on C8051F340 to implement and test this algorithm. The result shows that, a infrared multi-touch system is achieved which has the advantage of simple, accurate coordinates, and smooth moving.