By Li-minn Ang, Kah Phooi Seng, Li Wern Chew, Lee Seng Yeong, Wai Chong Chia
Traditional instant sensor networks (WSNs) trap scalar information akin to temperature, vibration, strain, or humidity. inspired through the luck of WSNs and in addition with the emergence of recent know-how within the kind of reasonably cheap photograph sensors, researchers have proposed combining photograph and audio sensors with WSNs to shape instant multimedia sensor networks (WMSNs). This introduces useful and study demanding situations, simply because multimedia sensors, rather photograph sensors, generate large quantities of information to be processed and allotted in the community, whereas sensor nodes have limited battery strength and resources.
This ebook describes how reconfigurable applied sciences equivalent to field-programmable gate arrays (FPGAs) provide low-budget, versatile structures for imposing WMSNs, with a first-rate specialise in constructing effective algorithms and architectures for info aid, together with occasion detection, occasion compression, and multicamera processing for implementations. The authors contain a finished evaluate of instant multimedia sensor networks, a whole specification of a truly low-complexity, low-memory FPGA WMSN node processor, and a number of other case experiences that illustrate info aid algorithms for visible occasion compression, detection, and fusion.
The e-book may be of curiosity to educational researchers, R&D engineers, and computing device technology and engineering graduate scholars engaged with sign and video processing, laptop imaginative and prescient, embedded structures, and sensor networks.
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Extra info for Wireless Multimedia Sensor Networks on Reconfigurable Hardware: Information Reduction Techniques
5 shows a single-tier clustering architecture, and Fig. 6 shows a multi-tier clustering architecture. There have been many clustering algorithms which have been proposed to address the clustering issues. 3 Mote Platform Architectures Researchers have classified wireless mote platform architectures into three categories depending on their processing power and storage: lightweight-class platforms, intermediate-class platforms and PDA-class platforms . Lightweight-class platforms have low processing power capability, small storage and are usually equipped with basic communications only.
All of these depend on the properties of the water such as temperature, depth and composition. 3 Near-Field Radio Frequency Communications In a far-field RF communication system, most of the energy is contained in the electric field. Near-field RF communication makes use of the strong magnetic fields in the near field of the signal but weak in the far field. 4 Specifications PHY Types of Nodes • Coordinator • End Node/Device • Router* Reliable Delivery • CSMA/CA • MAC-level (point-point) Retries/Ack • Mesh network-level (multi-hop) Retries/Ack* * Additional features from the ZigBee specifications Fig.
They carry out a series of experiments and show that the algorithm is capable of tracking a target with accuracy comparable to that achieved by a centralised approach wherein every measurement is transmitted to the base station. There are two approaches which can be used for object recognition: feature-based approaches and global approaches. 4 Information Processing in WMSN 35 describe the object using descriptors of these local feature points. Global approaches describe the object using their global properties such as shape, silhouette, texture or colour.