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Journal of Electrical and Computer Engineering
Volume 2016, Article ID 9312439, 14 pages
http://dx.doi.org/10.1155/2016/9312439
Research Article

Assessing Availability in Wireless Visual Sensor Networks Based on Targets’ Perimeters Coverage

1State University of Feira de Santana, Feira de Santana, BA, Brazil
2University of the Bío-Bío, Concepción, Chile

Received 2 July 2016; Accepted 20 September 2016

Academic Editor: Stefano Basagni

Copyright © 2016 Daniel G. Costa and Cristian Duran-Faundez. 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.

Abstract

Availability in wireless visual sensor networks is a major design issue that is directly related to applications monitoring quality. For targets monitoring, visual sensors may be deployed to cover most or all of targets, and monitoring quality may be focused on how well a set of targets are being covered. However, targets may have different dimensions and it is expected that large targets may be only partially viewed by source nodes, which may affect coverage quality and lead to a state of unavailability. In this context, this article analyzes the effect of target’s size on effective coverage in wireless visual sensor networks. A new coverage metric, the Effective Target Viewing (ETV), is proposed to measure monitoring quality over a set of targets, which is exploited as a fundamental parameter for availability assessment. Results show that ETV can be used as a practical coverage metric when assessing availability in wireless visual sensor networks.