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Wireless Communications and Mobile Computing
Volume 2017 (2017), Article ID 7385052, 10 pages
Research Article

A Crowdsensing-Based Real-Time System for Finger Interactions in Intelligent Transport System

1Guangdong Provincial Key Laboratory of Robotics and Intelligent System, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
2The Chinese University of Hong Kong, Shatin, Hong Kong

Correspondence should be addressed to Jun Cheng

Received 3 July 2017; Revised 8 August 2017; Accepted 7 September 2017; Published 12 October 2017

Academic Editor: Zhaolong Ning

Copyright © 2017 Chengqun Song et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Crowdsensing leverages human intelligence/experience from the general public and social interactions to create participatory sensor networks, where context-aware and semantically complex information is gathered, processed, and shared to collaboratively solve specific problems. This paper proposes a real-time projector-camera finger system based on the crowdsensing, in which user can interact with a computer by bare hand touching on arbitrary surfaces. The interaction process of the system can be completely carried out automatically, and it can be used as an intelligent device in intelligent transport system where the driver can watch and interact with the display information while driving, without causing visual distractions. A single camera is used in the system to recover 3D information of fingertip for hand touch detection. A linear-scanning method is used in the system to determine the touch for increasing the users’ collaboration and operationality. Experiments are performed to show the feasibility of the proposed system. The system is robust to different lighting conditions. The average percentage of correct hand touch detection of the system is 92.0% and the average time of processing one video frame is 30 milliseconds.