MULTI-POINT RECOGNITION METHOD AND SYSTEM FOR INFRARED TOUCH SCREEN

摘要

The present invention relates to a multi-point recognition method and system for an infrared touch screen.The present invention first generates an optical path image corresponding to an optical path of the infrared touch screen during one recognition process; then extracts touch point information from the optical path image.Preferably, whether or not there is a touch point on the infrared touch screen is first judged according to optical path data during one recognition process; if there is no touch point, then no recognition processing will be performed during this recognition process.Preferably, if there is a touch point, then the area where the touch point exists is judged continuously according to the optical path data, an optical path image corresponding to the optical path in the area is generated for the area where the touch point exists; subsequently the touch point information is extracted from the optical path image.Proposed in the present invention are a completely new multi-point recognition method and system for an infrared touch screen based on image processing which are suitable for the recognition of an arbitrary plurality of touch points. The accuracy rate of the recognition is high, and there is no ghost point or there are few ghost points (Figure 2).