The design of infrared touch screen based on MCU

Author

Wei, Zheng ; Liu, Wei ; He, Qing ; Wei, Ning ; Wang, Chenxi ; Yan, Tingfang ; Hu, Chao ; Meng, Max Q -H

Author_Institution

Shenzhen Institutes of Adv. Technol., Chinese Acad. of Sci., Shenzhen, China

fYear

2011

fDate

6-8 June 2011

Firstpage

485

Lastpage

489

Abstract

This paper introduces a touch screen technology based on infrared optical. This technology has apparent advantages in the large-size applications, which is simple, low cost, high feasibility. In the system, the detection of ambient light and the adaptive control of IR LED can effectively enhance the adaptability of the touch screen in complex light environment via the MCU. In image processing, the image of foreground and background are segmented by Otsu´s method with a coefficient. Integral projection is adopted to recognize the contact area. The result shows that the performance of the system fully meets the requirements of real time and accuracy.

Keywords

image segmentation; infrared imaging; light emitting diodes; microcontrollers; touch sensitive screens; IR LED; MCU; Otsu method; adaptive control; image processing; infrared optical; infrared touch screen design; integral projection; Cameras; Control systems; Image segmentation; Light emitting diodes; Noise; Pixel; HCI; Integral projection; MCU; optics-based;

fLanguage

English

Publisher

ieee

Conference_Titel

Information and Automation (ICIA), 2011 IEEE International Conference on

Conference_Location

Shenzhen

Print_ISBN

978-1-4577-0268-6

Electronic_ISBN

978-1-4577-0269-3

Type

conf

DOI

10.1109/ICINFA.2011.5949041

Filename

5949041