交互式红外电子白板的新型定位算法  

A NOVEL POSITIONING ALGORITHM FOR INTERACTIVE INFRARED ELECTRON WHITEBOARD

作　　者：刘良均[1] 孙力[1] 鲍健[2] 

机构地区：[1]安徽农业大学信息与计算机学院,安徽合肥230036 [2]中国科学院安徽光学精密机械研究所,安徽合肥230031

出　　处：《计算机应用与软件》2014年第1期239-241,共3页Computer Applications and Software

摘　　要：针对红外电子白板定位方法存在的程序计算复杂、可操作性差等缺陷,提出一种新型的定位细化算法。算法中使用"相对强度值"概念实现红外信号变化值的量化,并将相对强度值"归一化"为16个等级,最后采用"重心"公式,获取细化的实体触摸点坐标,即实体的精确位置。试验结果表明:该算法程序简单,实现容易,定位精度高,取得了较好的效果。满足红外电子白板实际应用需求,在提高系统分辨率的同时也提高了响应实时性。As for the defects of program calculation complexity and poor operability that exist in infrared electron whiteboard positioning method, a novel positioning refined method is put forward in the essay. In the algorithm the concept of “relative intensity value” is used to achieve the quantization of infrared signal varying value. The relative intensity value is “normalized” into 16 levels. At last “center of gravi- ty”formula is applied to acquire refined entity＇s touch point coordinate, i.e. entity＇s precise position. Experiments show that the algorithm is simple at programming, easy at implementation, preeise at positioning, and achieves better results. It not only meets the practical require- ments for infrared electron whiteboard, but also improves both the system resolution and the real-time responsiveness.

关 键 词：电子白板定位细化算法 相对强度值 “重心”公式 定位精度 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]