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检索条件"任意字段=Conference on Advanced Sensor Systems and Applications VII"

共 4654 条记录，以下是151-160 订阅

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Experimental single-chip color HDTV image acquisition system with 8M-pixel CMOS image sensor

Experimental single-chip color HDTV image acquisition system...

引用

conference on sensors, Cameras and systems for Scientific/Industrial applications vii

作者： Shimamoto, H Yamashita, T Funatsu, R Mitani, K Nojiri, Y NHK Japan Broadcasting Corp Sci & Tech Res Labs Setagaya Ku 1-10-11 Kinuta Tokyo Japan

ISBN: (纸本)0819461083

We have developed an experimental single-chip color HDTV image acquisition system using 8M-pixel CMOS image sensor. The sensor has 3840 x 2160 effective pixels and is progressively scanned at 60 frames per second. We describe the color filter array and interpolation method to improve image quality with a high-pixel-count single-chip sensor. We also describe an experimental image acquisition system we used to measured spatial frequency characteristics in the horizontal direction. The results indicate good prospects for achieving a high quality single chip HDTV camera that reduces pseudo signals and maintains high spatial frequency characteristics within the frequency band for HDTV.

关键词： single chip color CFA interpolation CMOS image sensor HDTV SHD SHV

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Quantitative and qualitative performance comparison of a biomimetic vision sensor with commercial CCD camera sensors

Quantitative and qualitative performance comparison of a bio...

引用

conference on sensors, Cameras and systems for Scientific/Industrial applications vii

作者： Prabhakara, RS Wright, CHG Barrett, SF Harman, W Univ Wyoming Laramie WY 82071 USA NAVAIR China Lake CA USA

ISBN: (纸本)0819461083

Traditional imaging sensors for computer vision, such as CCD and CMOS arrays, have well-known limitations with regard to detecting objects that are very small in size (that is, a small object image compared to the pixel size), are viewed in a low contrast situation, are moving very fast (with respect to the sensor integration time), or are moving very small distances compared to the sensor pixel spacing. Any one or a combination of these situations can foil a traditional CCD or CMOS sensor array. Alternative sensor designs derived from biological vision systems promise better resolution and object detection in situations such as these. The patent-pending biomimetic vision sensor based on Musca domestica (the common house fly) is capable of reliable object rendition in spite of challenging movement and low contrast conditions. We discuss some interesting early results of comparing the biomimetic sensor to commercial CCD sensors in terms of contrast and motion sensitivity in situations such as those listed above.

关键词： computer vision biomimetic sensor CCD array contrast sensitivity motion sensitivity

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High performance seismic sensor requirements for military and security applications

High performance seismic sensor requirements for military an...

引用

conference on Unattended Ground sensor Technologies and applications vii

作者： Pakhomov, A Pisano, D Sicignano, A Goldburt, T Gen Sensing Syst LLC Ardsley NY 10502 USA

ISBN: (纸本)0819457817

General Sensing systems (GSS) has been developing seismic sensors for different security and military applications for the past several years. Research and development in this area does not have a single-value purpose as security and military applications are of a broad variety. Many of the requirements for seismic sensors are well known. Herein we describe additional requirements for seismic sensors that are not at the center of common attention and associated with high performance seismic sensors. We find that the hard issues related to "remote" deployment/installation methods can be solved, given the seismic sensor does not have the usual single-axis sensitivity, but sensitivity to arbitrary oriented impact/vibrations. Our results show that such a sensor can be designed, in particular based on electret materials. We report that traditional frequency response curve linearity is not always the appropriate goal. Such issues as useful signal frequency band and an interference immunity should be directly taken into account. In addition, the mechanical oscillator of the seismic sensor should have a very broad dynamic range about 120dB, or an adjustable sensitivity for use in various tactical applications. We find that increasing sensitivity is not so much needed as is reducing of the seismic sensor sensitivity threshold. The lower sensitivity threshold in higher target detection range can be obtained in low noise environmental conditions. We will also show that the attempt to design and manufacture a universal seismic sensor for every possible application seems unreasonable. In every respect it makes sense to design a seismic sensor set, which can fit and satisfy all plurality of the applications and multi objective requirements.

关键词： intruder detection seismic sensor homeland security and military seismic systems

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Mitigating Sandwich Attacks against a Secure Key Management Scheme in Wireless sensor Networks for PCS/SCADA

Mitigating Sandwich Attacks against a Secure Key Management ...

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24th IEEE International conference on advanced Information Networking and applications (AINA)

作者： Alzaid, Hani Park, DongGook Nieto, Juan Gonzalez Foo, Ernest Queensland Univ Technol Informat Secur Inst Brisbane Qld 4000 Australia Sunchon Natl Univ Sunchon South Korea

ISBN: (纸本)9780769540184

Alzaid et al. proposed a forward & backward secure key management scheme in wireless sensor networks for Process Control systems (PCSs) or Supervisory Control and Data Acquisition (SCADA) systems. The scheme, however, is still vulnerable to an attack called the sandwich attack that can be launched when the adversary captures two sensor nodes at times t(1) and t(2), and then reveals all the group keys used between times t(1) and t(2). In this paper, a fix to the scheme is proposed in order to limit the vulnerable time duration to an arbitrarily chosen time span while keeping the forward and backward secrecy of the scheme untouched. Then, the performance analysis for our proposal, Alzaid et al.'s scheme, and Nilsson et al.'s scheme is given.

关键词： sandwich attack wireless sensor network forward and backward secrecy key management process control systems supervisory control and data acquisition node

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Real Time Assessment of a Linear Pyroelectric sensor Array for Object Classication

Real Time Assessment of a Linear Pyroelectric Sensor Array f...

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conference on Electro-Optical and Infrared systems - Technology and applications vii

作者： White, William E., III Brown, Jeremy B. Chari, Srikant Jacobs, Eddie L. Univ Memphis Memphis TN 38152 USA

ISBN: (纸本)9780819483522

Pyroelectric linear arrays can be used to generate profiles of targets. Simulations have shown that generated profiles can be used to classify human and animal targets. A pyroelectric array system was used to collect data and classify targets as either human or non-human in real time. The pyroelectric array system consists of a 128-element Dias 128LTI pyroelectric linear array, an F/0.86 germanium lens, and an 18F4550 pic microcontroller for A/D conversion and communication. The classifier used for object recognition was trained using data collected in petting zoos and tested using data collected at the US-Mexico border in Arizona.

关键词： real time pyroelectric sensor classification detection

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Challenges, Protocols and Case Studies in Design of Reliable Energy Efficient Wireless sensor Networks 4

Challenges, Protocols and Case Studies in Design of Reliable...

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4th International conference on advanced Computing and Communication systems (ICACCS)

作者： Musale, Vinayak Chaudhari, Devendra Govt Coll Engn Dept Comp Sci & Engn Amravati Maharashtra India Govt Coll Engn Dept Elect & Telecommun Engn Amravati Maharashtra India

ISBN: (纸本)9781509045594

Now a days wireless sensors are attracting strong interest for different monitoring and controlling applications as they are integrated with the function of sensing, processing and wireless communication. The wireless sensor networks have been deployed for agricultural, industrial, remote monitoring and traffic management purposes. As energy shortage is a worldwide problem so that more attention has been placed on incorporating energy harvesting devices in wireless sensor networks. The main purpose of this paper is to focus on the systematic study of the design principles of wireless sensor networks and to provide technical approaches to address three key challenges in designing of reliable and endurable wireless sensor networks. The key challenges are namely communication reliability, operation with significantly low and effective power sources and multi-tier network architecture.

关键词： Data Energy Networks Security sensor Wireless

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Multi-sensor Data Fusion for Cluster-based Data Aggregation in IoT applications 13

Multi-Sensor Data Fusion for Cluster-based Data Aggregation ...

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13th IEEE International conference on advanced Networks and Telecommunication systems (IEEE ANTS)

作者： Redhu, Surender Hegde, Rajesh M. Indian Inst Technol Kanpur Uttar Pradesh India

ISBN: (纸本)9781728137155

Clustering of devices plays a significant role in the development of energy-efficient wireless sensor networks for IoT applications. In this paper, a novel clustering method is proposed which utilizes the multiple sensor modalities of devices to develop an energy-efficient data aggregation protocol. It groups the devices of a network into different clusters using a fused resemblance matrix. The proposed method fuses different sensor modalities like radio, acoustic and light to obtain robust resemblance coefficients. The weights for fusion of different modalities are computed using the modelling error and within a confidence interval. The proposed clustering method is developed using the hierarchical agglomerative clustering framework. Performance of the proposed method in cluster-based data aggregation is evaluated for various sensor networks. Experimental results illustrate the significance of the proposed multi-sensor data based clustering scheme in energy-efficient data aggregation over IoT networks.

关键词： Cluster analysis

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Multi-sensor Airborne Imagery Collection and Processing Onboard Small Unmanned systems

Multi-Sensor Airborne Imagery Collection and Processing Onbo...

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conference on Airborne Intelligence, Surveillance, Reconnaissance (ISR) systems and applications vii

作者： von Berg, Dale Linne Anderson, Scott A. Bird, Alan Holt, Niel Kruer, Melvin Walls, Thomas J. Wilson, Michael L. USN Res Lab Washington DC 20375 USA Space Dynam Lab N Logan UT 84341 USA

ISBN: (纸本)9780819481320

FEATHAR (Fusion, Exploitation, Algorithms, and Targeting for High-Altitude Reconnaissance) is an ONR funded effort to develop and test new tactical sensor systems specifically designed for small manned and unmanned platforms (payload weight < 50 lbs). This program is being directed and executed by the Naval Research Laboratory (NRL) in conjunction with the Space Dynamics Laboratory (SDL). FEATHAR has developed and integrated EyePod, a combined long-wave infrared (LWIR) and visible to near infrared (VNIR) optical survey & inspection system, with NuSAR, a combined dual band synthetic aperture radar (SAR) system. These sensors are being tested in conjunction with other ground and airborne sensor systems to demonstrate intelligent real-time cross-sensor cueing and in-air data fusion. Results from test flights of the EyePod and NuSAR sensors will be presented.

关键词： FEATHAR EyePod NuSAR NITF geo-aware geo-rectified geo-registered UAV UAS

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An integrated, modular, power-aware microsensor architecture and application to unattended acoustic vehicle tracking

An integrated, modular, power-aware microsensor architecture...

引用

conference on Unattended Ground sensor Technologies and applications vii

作者： Bajura, M Schott, B Flidr, J Czarnaski, J Worth, C Tho, T Wang, L Univ So Calif Inst Informat Sci Arlington VA 22203 USA

ISBN: (纸本)0819457817

We introduce a truly modular, power-aware, distributed microsensor architecture, capable of seamlessly spanning performance metrics from point-optimized low-power to point-optimized high-power applications. This type of performance is often needed in unattended ground sensor applications such as acoustic sensing and tracking, where long periods of minimal sensing activity are intermixed with short periods of intense sensor processing. The system design and implementation of a microsensor platform based on this architecture are described with experimental results. We show that although building a modular power-aware system requires additional hardware components, it results in system capable of rapid physical hardware and software reconfiguration with module reuse for new applications, while achieving a significant decrease in overall system power.

关键词： unattended ground sensors embedded systems low-power design embedded system architecture power management acoustic sensor

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Target Coverage using a Collaborative Platform for sensor Cloud 9

Target Coverage using a Collaborative Platform for Sensor Cl...

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9th IEEE International conference on advanced Networks and Telecommuncations systems (ANTS)

作者： Sen, Biplab K. Khatua, Sunirmal Das, Rajib K. Univ Calcutta Dept Comp Sci & Engn Kolkata 700073 W Bengal India

ISBN: (纸本)9781509002931

Nowadays sensor-cloud has received a lot of interests among researchers in the field of Wireless sensor Networks (WSN) as well as Cloud Computing. An integral part of the sensor Cloud platform is the Collaboration of WSN providers which improves the utilization of sensor resources. The physical sensors in such a collaborative environment are shared among multiple applications from different administrative domains. In this paper, we propose a sensor Cloud Architecture which allows the users to deploy their sensor applications on-demand within the collaborative platform. The sensor resources used by the application are provided as a service to the user. The cost for offering such service depends on the number of physical sensors selected for covering the targets (locations of interest) for that application as well as connecting the selected physical sensors to the base station. In this paper, we proposed a two phase algorithm for this problem. In the first phase (Coverage), an Integer Programming Problem(IPP) is used to find a minimum set of sensors to cover the targets. In the next phase (Connectivity) a heuristic is used to extend the set such that connectivity of all the selected sensors is ensured. The performance of the proposed approach is validated through simulation which shows significant improvement of using collaboration over multiple non-collaborative WSNs. We also establish the superiority of the heuristic for ensuring connectivity over one such algorithm in the literature.

关键词： Virtual sensor collaborative network sensor cloud target coverage

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