enter search term and/or author name
Collaborative localization in visual sensor networks
Mahmut Karakaya, Hairong Qi
Article No.: 18
Collaboration in visual sensor networks is essential not only to compensate for the limitations of each sensor node but also to tolerate inaccurate information generated by faulty sensors. This article focuses on the design of a collaborative...
Distributed data association in smart camera networks using belief propagation
Jiuqing Wan, Li Liu
Article No.: 19
One of the fundamental requirements for visual surveillance with smart camera networks is the correct association of camera's observations with the tracks of objects under tracking. Most of the current systems work in a centralized manner in that...
Socio-economic vision graph generation and handover in distributed smart camera networks
Lukas Esterle, Peter R. Lewis, Xin Yao, Bernhard Rinner
Article No.: 20
In this article we present an approach to object tracking handover in a network of smart cameras, based on self-interested autonomous agents, which exchange responsibility for tracking objects in a market mechanism, in order to maximise their own...
Progressively refined wyner-ziv video coding for visual sensors
Nikos Deligiannis, Frederik Verbist, Jürgen Slowack, Rik van de Walle, Peter Schelkens, Adrian Munteanu
Article No.: 21
Wyner-Ziv video coding constitutes an alluring paradigm for visual sensor networks, offering efficient video compression with low complexity encoding characteristics. This work presents a novel hash-driven Wyner-Ziv video coding architecture for...
A predictive duty cycle adaptation framework using augmented sensing for wireless camera networks
Paul J. Shin, Johnny Park, Avinash C. Kak
Article No.: 22
Energy efficiency dominates practically every aspect of the design of a wireless sensor network and duty cycling is an important tool for achieving high energy efficiencies. Duty cycling for wireless camera networks meant for tracking objects is...
Camera selection for tracking in distributed smart camera networks
Linda Tessens, Marleen Morbee, Hamid Aghajan, Wilfried Philips
Article No.: 23
Tracking persons with multiple cameras with overlapping fields of view instead of with one camera leads to more robust decisions. However, operating multiple cameras instead of one requires more processing power and communication bandwidth, which...
Low-complexity scalable distributed multicamera tracking of humans
Sebastian Gruenwedel, Vedran Jelaca, Jorge Oswaldo Nino-Castaneda, Peter van Hese, Dimitri van Cauwelaert, Dirk van Haerenborgh, Peter Veelaert, Wilfried Philips
Article No.: 24
Real-time tracking of people has many applications in computer vision, especially in the domain of surveillance. Typically, a network of cameras is used to solve this task. However, real-time tracking remains challenging due to frequent occlusions...
Online control of active camera networks for computer vision tasks
Adrian Ilie, Greg Welch
Article No.: 25
Large networks of cameras have been increasingly employed to capture dynamic events for tasks such as surveillance and training. When using active cameras to capture events distributed throughout a large area, human control becomes impractical and...
Calibrating a wide-area camera network with non-overlapping views using mobile devices
Thomas Kuo, Zefeng Ni, Santhoshkumar Sunderrajan, B. S. Manjunath
Article No.: 26
In a wide-area camera network, cameras are often placed such that their views do not overlap. Collaborative tasks such as tracking and activity analysis still require discovering the network topology including the extrinsic calibration of the...
Multicamera video summarization and anomaly detection from activity motifs
Carter de Leo, B. S. Manjunath
Article No.: 27
Camera network systems generate large volumes of potentially useful data, but extracting value from multiple, related videos can be a daunting task for a human reviewer. Multicamera video summarization seeks to make this task more tractable by...
Adaptive instantiation of the protocol interference model in wireless networked sensing and control
Hongwei Zhang, Xin Che, Xiaohui Liu, Xi Ju
Article No.: 28
Interference model is the basis of MAC protocol design in wireless networked sensing and control, and it directly affects the efficiency and predictability of wireless messaging. To exploit the strengths of both the physical and the protocol...
Optimal nonuniform deployment of sensors for distributed detection in wireless sensor networks
Vibhav Kapnadak, Edward J. Coyle
Article No.: 29
We determine the optimal nonuniform spatial density of nodes in a single-hop Wireless Sensor Network (WSN) whose task is the distributed detection of a target within its sensing field. The optimization approach accounts for such factors as the...
Maximum likelihood analysis of conflicting observations in social sensing
Dong Wang, Lance Kaplan, Tarek F. Abdelzaher
Article No.: 30
This article addresses the challenge of truth discovery from noisy social sensing data. The work is motivated by the emergence of social sensing as a data collection paradigm of growing interest, where humans perform sensory data collection tasks....
Troubleshooting interactive complexity bugs in wireless sensor networks using data mining techniques
Mohammad Maifi Hasan Khan, Hieu Khac Le, Hossein Ahmadi, Tarek F. Abdelzaher, Jiawei Han
Article No.: 31
This article presents a tool for uncovering bugs due to interactive complexity in networked sensing applications. Such bugs are not localized to one component that is faulty, but rather result from complex and unexpected interactions between...
Radio diversity for reliable communication in sensor networks
Branislav Kusy, David Abbott, Christian Richter, Cong Huynh, Mikhail Afanasyev, Wen Hu, Michael Brünig, Diethelm Ostry, Raja Jurdak
Article No.: 32
Radio connectivity in wireless sensor networks is highly intermittent due to unpredictable and time-varying noise and interference patterns in the environment. Because link qualities are not predictable prior to deployment, current deterministic...
Coverage quality and smoothness criteria for online view selection in a multi-camera network
Aaron Mavrinac, Xiang Chen, Yonghong Tan
Article No.: 33
The problem of online selection of monocular view sequences for an arbitrary task in a calibrated multi-camera network is investigated. An objective function for the quality of a view sequence is derived from a novel task-oriented, model-based...
On detection and tracking of variant phenomena clouds
My T. Thai, Ravi Tiwari, Raja Bose, Abdelsalam Helal
Article No.: 34
Phenomena clouds are characterized by nondeterministic, dynamic variations of shapes, sizes, direction, and speed of motion along multiple axes. The phenomena detection and tracking should not be limited to some traditional applications such as...
Failure detection in wireless sensor networks: A sequence-based dynamic approach
Abu Raihan M. Kamal, Chris J. Bleakley, Simon Dobson
Article No.: 35
Wireless Sensor Network (WSN) technology has recently moved out of controlled laboratory settings to real-world deployments. Many of these deployments experience high rates of failure. Common types of failure include node failure, link failure,...
Analysis of a prioritized contention model for multimedia wireless sensor networks
Mehmet Yunus Donmez, Sinan Isik, Cem Ersoy
Article No.: 36
Emerging multimedia applications for sensor networks require the co-existence of different types of traffic with different QoS provisions in terms of latency and throughput. Prioritization-based service differentiation mechanisms are applied in...
Data-driven link quality prediction using link features
Tao Liu, Alberto E. Cerpa
Article No.: 37
As an integral part of reliable communication in wireless networks, effective link estimation is essential for routing protocols. However, due to the dynamic nature of wireless channels, accurate link quality estimation remains a challenging task....