By Li-minn Ang, Kah Phooi Seng, Li Wern Chew, Lee Seng Yeong, Wai Chong Chia
Traditional instant sensor networks (WSNs) trap scalar facts equivalent to temperature, vibration, strain, or humidity. prompted by means of the luck of WSNs and in addition with the emergence of recent expertise within the type of reasonably cheap photograph sensors, researchers have proposed combining photo and audio sensors with WSNs to shape instant multimedia sensor networks (WMSNs). This introduces useful and study demanding situations, simply because multimedia sensors, quite photo sensors, generate large quantities of knowledge to be processed and disbursed in the community, whereas sensor nodes have limited battery energy and resources.
This e-book describes how reconfigurable applied sciences reminiscent of field-programmable gate arrays (FPGAs) provide least expensive, versatile structures for imposing WMSNs, with a primary specialize in constructing effective algorithms and architectures for info aid, together with occasion detection, occasion compression, and multicamera processing for implementations. The authors contain a entire overview of instant multimedia sensor networks, an entire specification of a really low-complexity, low-memory FPGA WMSN node processor, and several other case reviews that illustrate details relief algorithms for visible occasion compression, detection, and fusion.
The ebook can be of curiosity to educational researchers, R&D engineers, and desktop technology and engineering graduate scholars engaged with sign and video processing, laptop imaginative and prescient, embedded platforms, and sensor networks.
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Extra info for Wireless Multimedia Sensor Networks on Reconfigurable Hardware: Information Reduction Techniques
The result is an intensity modulation with direct detection (IM/DD) system. g. g. air or vacuum). A common form of optical communication is to use infrared communication. Infrared communication has been used mainly for short-range communications in portable devices such as cell phones, laptops and PDAs. This has been replaced by alternative RF-based methods like Bluetooth which does not require line-ofsight (LoS). The LoS point-to-point communication is the most commonly used IR communication type.
5 Hierarchical single-tier multi-hop network architecture Cluster heads Base station Fig. 6 Hierarchical multi-tier multi-hop architecture Base station Tier 2 Cluster heads Tier 1 Cluster heads Tier 0 Cluster member This process not only reduces the energy consumption for communication but also balances the traffic load and improves scalability when the network grows. The major problem with clustering is how to select the cluster heads and how to organise the clusters. In this context, there are many clustering strategies.
Second generation approaches require more computational processing compared to first generation approaches. Thus, researchers have focused on adapting and modifying first generation algorithms to lower computational and memory requirements while still maintaining the coding performance. Further discussions of using event compression in WMSNs are given in Chap. 6. 3 Event Fusion WMSNs can employ multi-view approaches to further reduce the data. Each WCH receives data from several WMNs. The FOVs of WMNs may overlap, and the WCH can further reduce the data by performing event aggregation by consolidating the information from the WMNs.