GAO Xiang, ZHANG Xiao-jing
(College of Electrical Engineering and Automation, Shandong University of Science and Technology, Qingdao 266590, China )
Abstract： The paper puts forward a method of virtual keyboard key positioning based on infrared laser reflection and image processing technology. In this paper, the positioning principle is introduced first. And the experimental system is established based on image acquisition, image transformation, threshold selection and binarization processing and identification of key placement. Tested in the indoor environment, the method can achieve characters input efficiently and accurately. And the key positioning has high accuracy, validity and reliability. So the method which has a high practical value provides a good theoretical basis for design of virtual keyboard application.
Key words： key positioning; laser virtual keyboard; image processing; infrared laser reflection; threshold; binarization
CLD number： TP334.2 Document code： A
Article ID： 1674-8042(2014)02-0027-04 doi： 10.3969/j.issn.1674-8042.2014.02.005
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一种基于激光虚拟键盘按键定位的方法
高翔， 张晓静
(山东科技大学 电气与自动化工程学院， 山东 青岛 266590)
摘要:本文提出一种基于红外激光反射和图像处理技术的虚拟键盘按键定位方法。 首先介绍了按键定位的原理， 并从图像采集、 图像转换、 阈值选择与二值化处理、 按键位置识别等几个方面建立了试验系统。 然后在室内环境下测试， 发现该方法能实现高效准确的字符输入， 故按键定位有很高的准确性、 有效性以及可靠性。 该方法为虚拟键盘的应用设计提供了很好的理论依据， 具有较高的实用价值。
关键词:按键定位； 激光虚拟键盘； 图像处理； 红外激光反射； 阈值； 二值化
引用格式：GAO Xiang, ZHANG Xiao-jing. A method of key positioning based on laser virtual keyboard. Journal of Measurement Science and Instrumentation, 2014, 5(2): 27-30. [doi:10.3969/j.issn.1674-8042.2014.02.005]
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