基于视觉的多点触摸基本技术实现方法  

A Recognition and Tracking Method in Vision-Based Multi-touch Technique

作　　者：齐婷[1,2] 王锋[1] 

机构地区：[1]昆明理工大学云南省计算机技术应用重点实验室,云南昆明650051 [2]昆明理工大学信息工程与自动化学院,云南昆明650051

出　　处：《计算机技术与发展》2009年第10期138-140,144,共4页Computer Technology and Development

摘　　要：高性能的图像处理技术是基于视觉的多点触摸技术的关键,对于特征点的检测和跟踪是完成多点触摸系统的基础。文中主要介绍了几种算法用来解决特征点的识别和跟踪的问题。首先,图像轮廓变换算法用来分析手指与屏幕的接触区域,以及在此基础上采用中心计算算法确定特征点的中心坐标;再次,最小距离优先(MDF)算法对在两个相邻图像中的相应的特征点进行识别和跟踪,为随后的事件检测和手势识别提供了前提条件。实验结果表明,算法的性能满足多点触摸系统的实时要求。The fundamental technique of vision - based multi - touch technique is the high performance image processing, the basic of the multi - touch system is the blob recngnition and tracking. In this paper, several algorithms are introduced to resolve the problerns of hloh recognition and tracking. Image contour transformation algorithm is adopted to analyze the existence of finger contact area and a centroid calculation algorithm is used to calculate the coordinate value of center point of the blob; Minimum Distance First （MDF） algorithm is designed to identify and track the corresponding bloh in two sequential images and prepares for touch events and gcsture recognition. The experiment result shows that the performanee of the algorithms fully meets the requirement of real time multi - touch system.

关 键 词：基于视觉 多点触摸 特征点识别 特征点跟踪 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]