基于多目视觉技术的多点触摸屏系统的实现方法

Implementation Method of Multi-Touch Screen System Based on Multi-vision Technology

摘要:

设计了一种基于多目视觉技术的多点触摸屏系统;系统使用3个摄像机分别置于显示屏的左右两端和前方,利用计算机图像处理技术使普通显示屏具备触摸功能;为了有效减少图像处理时间,提高指尖坐标精度,提出了基于卡尔曼滤波器的指尖跟踪算法,通过卡尔曼滤波器预测指尖位置并以预测指尖点为中心划出矩形感兴趣区域进行指尖检测算法处理;实验证明,该系统能实时运行在嵌入式平台,并可实现较高的点击成功率,对于实现基于计算机视觉的触摸屏技术有着重要的研究意义。

Abstract:

This paper designed a multi-touch screen system based on multi-purpose vision technology.The system placed three cameras in front of the display and the left and right ends, and enabled ordinary display with touch functionality using computer image processing technology. In order to effectively reduce the image processing time and improve the accuracy of the coordinates of the fingertip, fingertip tracking algorithm was proposed based on the Kalman filter. The fingertip as the center point of ROI (Region of Interest) was predicted by Kalman filter. Experimental results show that the system can effectively run in the real-time embedded platform and achieve the instant detection of finger clicking actions, and it has important significance for the computer vision-based touch-screen technology.