Next Article in Journal
Programmable Low-Power Low-Noise Capacitance to Voltage Converter for MEMS Accelerometers
Next Article in Special Issue
A Novel Secure IoT-Based Smart Home Automation System Using a Wireless Sensor Network
Previous Article in Journal
Matched Field Processing Based on Least Squares with a Small Aperture Hydrophone Array
Previous Article in Special Issue
Compound Event Barrier Coverage in Wireless Sensor Networks under Multi-Constraint Conditions
Article Menu
Issue 1 (January) cover image

Export Article

Open AccessArticle
Sensors 2017, 17(1), 64;

Novel Visual Sensor Coverage and Deployment in Time Aware PTZ Wireless Visual Sensor Networks

Center for General Education, Chang Gung University, Taoyuan 333, Taiwan
Department of Information Management, Shih Hsin University, Taipei 116, Taiwan
Author to whom correspondence should be addressed.
Academic Editors: Subhas Chandra Mukhopadhyay, Hemant Ghayvat and Nagender Kumar Suryadevara
Received: 11 November 2016 / Revised: 26 December 2016 / Accepted: 28 December 2016 / Published: 30 December 2016
(This article belongs to the Special Issue Sensors for Home Automation and Security)
Full-Text   |   PDF [3189 KB, uploaded 30 December 2016]   |  


In this paper, we consider the visual sensor deployment algorithm in Pan-Tilt-Zoom (PTZ) Wireless Visual Sensor Networks (WVSNs). With PTZ capability, a sensor’s visual coverage can be extended to reduce the number of visual sensors that need to be deployed. The coverage zone of a visual sensor in PTZ WVSN is composed of two regions, a Direct Coverage Region (DCR) and a PTZ Coverage Region (PTZCR). In the PTZCR, a visual sensor needs a mechanical pan-tilt-zoom operation to cover an object. This mechanical operation can take seconds, so the sensor might not be able to adjust the camera in time to capture the visual data. In this paper, for the first time, we study this PTZ time-aware PTZ WVSN deployment problem. We formulate this PTZ time-aware PTZ WVSN deployment problem as an optimization problem where the objective is to minimize the total visual sensor deployment cost so that each area is either covered in the DCR or in the PTZCR while considering the PTZ time constraint. The proposed Time Aware Coverage Zone (TACZ) model successfully captures the PTZ visual sensor coverage in terms of camera focal range, angle span zone coverage and camera PTZ time. Then a novel heuristic, called Time Aware Deployment with PTZ camera (TADPTZ) algorithm, is proposed to solve the problem. From our computational experiments, we found out that TACZ model outperforms the existing M coverage model under all network scenarios. In addition, as compared to the optimal solutions, the TACZ model is scalable and adaptable to the different PTZ time requirements when deploying large PTZ WVSNs. View Full-Text
Keywords: PTZ visual sensor; PTZ time constraint; visual sensor deployment; wireless visual sensor networks PTZ visual sensor; PTZ time constraint; visual sensor deployment; wireless visual sensor networks

Figure 1

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 (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Yap, F.G.H.; Yen, H.-H. Novel Visual Sensor Coverage and Deployment in Time Aware PTZ Wireless Visual Sensor Networks. Sensors 2017, 17, 64.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top