Computer Engineering and Applications ›› 2011, Vol. 47 ›› Issue (32): 71-74.

• 研发、设计、测试 • Previous Articles     Next Articles

Design of non-contact touch screen system

XIANG Binbin,JIANG Xiangdong,WANG Jimin,LI Jianguo   

  1. School of Optoelectronic Information,University Of Electronic Science and Technology of China,Chengdou 610054,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-11-11 Published:2011-11-11

非接触式触摸屏系统的设计

向斌宾,蒋向东,王继岷,李建国   

  1. 电子科技大学 光电信息学院,成都 610054

Abstract: When the current touch screen must be contacted control,it proposes a new touch screen system based on the image processing technology.The system introduces Microsoft VX-6000 USB2.0 camera as its image sensor,gathers image sequences,identifies and positions the laser spot,and responds with users’ pointing information.It describes the architecture of the system,a software for ?positioning,and uses image processing algorithm based on OpenCV(open source computer vision library) to help developing its software system.It proposes an image secondary correction method based on edge-restoration.By training samples,it finds that the system has excellent accuracy.The experimental results indicate that the system can realize the non-contact requirement and provide an effective thought for the study of non-contact large screen wall touch screen system.

Key words: touch screen, non-contact, position the laser spot, image correction

摘要: 针对目前触摸屏必须接触式控制的缺陷,提出了一种基于图像处理技术的新型触摸屏系统。该系统以微软VX—6000USB2.0摄像头为图像传感器,由PC机采集图像序列,识别和跟踪定位激光光斑,并对用户的指点控制信息做出相应反应。阐述了该系统结构及定位原理,使用基于OpenCV(open source computer vision library)的图像处理算法辅助开发其软件系统。提出一种基于边界修复的图像二次校正法,通过对训练样本的测量发现,系统拥有很好的指点精度。实验结果表明,所设计触摸屏系统能够初步实现非接触式指点的要求,为大屏幕挂壁式非接触式触摸屏系统的研究提供了有效的思路。

关键词: 触摸屏, 非接触式, 激光光斑定位, 图像校正