基于USB HID的电子白板的多点触控技术开发  

MULTI-TOUCH TECHNOLOGY DEVELOPMENT FOR WHITEBOARD BASED ON USB HID

作　　者：刘森[1] 周祖微[1] 王忆文[1] 李辉[1] 

机构地区：[1]电子科技大学电子薄膜与集成器件国家重点实验室,四川成都610054

出　　处：《计算机应用与软件》2013年第8期109-112,共4页Computer Applications and Software

基　　金：广东省教育部产学研合作项目(201013090400345)

摘　　要：针对基于视觉的电子白板,提出一种能去除伪点干扰的两点识别算法,并开发了基于USB的多点触控技术。在开发过程中,白板系统通过HID(Human Interface Device)规范实现了与Windows7操作系统的无缝对接,免去了复杂的系统驱动程序开发工作,简便地实现了单点和两点触控。开发的多点触控技术已经通过实验进行了验证,提升了电子白板的用户体验。For visual-based whiteboard, in this article we propose a two-point recognition algorithm which can remove the interference of the pseudo-point, and develop a USB-based multi-touch technology. In development process, the whiteboard system achieves the seamless connection with Windows 7 operating system by following the HID specification, which eliminates the need of complex system driver development and easily achieves single touch and two-point touch. The development of multi-touch technology had been validated through the experiment, and it improves the user experience of whiteboard as well.

关 键 词：USB 多点触控 ARM Cotex-M3 HID 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]