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Conference on Infrared Technology and Applications XXXVI

作者： Pitt, Timothy S. Wood, Sam B. Waddle, Caleb E. Edwards, William D. Yeske, Ben S. USA Aviat & Missile Res Dev & Engn Ctr Redstone Arsenal AL USA Dynetics Inc Huntsville AL USA

ISBN: (纸本)9780819481245

The US Army Aviation and Missile Research, development, and Engineering Center (AMRDEC) is developing a micro-uncooled infrared (IR) capability for small unmanned aerial systems (SUAS). In 2007, AMRDEC procured several uncooled microbolometers for lab and field test evaluations, and static tower tests involving specific target sets confirmed initial modeling and simulation predictions. With these promising results, AMRDEC procured two captive flight test (CFT) vehicles and, in 2008, completed numerous captive flights to capture imagery with the micro-uncooled infrared sensors. Several test configurations were used to build a comprehensive data set. These configurations included variations in look-down angles, fields of view (FOV), environments, altitudes, and target scenarios. Data collected during these field tests is also being used to develop human tracking algorithms and image stabilization software by other AMRDEC personnel. Details of these ongoing efforts will be presented in this paper and will include: 1) onboard digital data recording capabilities;2) analog data links for visual verification of imagery;3) sensor packaging and design;which include both infrared and visible cameras;4) field test and data collection results;5) future plans;6) potential applications. Finally, AMRDEC has recently acquired a 17 mu m pitch detector array. The paper will include plans to test both 17 mu m and 25 mu m microbolometer technologies simultaneously in a side-by-side captive flight comparison.

关键词： Cameras Sensors Infrared radiation Systems modeling algorithm development Computing systems Infrared sensors Microbolometers Neodymium NVThermIP

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development of a Generic Network Enabled Autonomous Vehicle System 10

Development of a Generic Network Enabled Autonomous Vehicle ...

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United-Kingdom-Automatic-Control-Council (UKACC) 10th International Conference on Control (CONTROL)

作者： Coombes, Matthew Eaton, William McAree, Owen Chen, Wen-Hua Univ Loughborough Dept Automot & Aeronaut Engn Loughborough LE11 3TU Leics England

ISBN: (纸本)9781479950119

This paper describes the development of a system for autonomous vehicle testing, utilising conventional network infrastructure for communication and control;allowing simultaneous control of multiple vehicles of differing vehicle types. A basic level of autonomy is achieved through the use of an Arduino based commercial autopilot (ArduPilot), which also allows for remote vehicle control via MAVLink protocol commands given through serial communication. Traditionally messages are sent using point-to-point wireless serial modems. As these are restricted in terms of bandwidth and flexibility, an improved set-up is suggested, where an embedded computer system is attached to each vehicle. A custom written Node. js program (MAVNode) is then used to encode and decode MAVLink messages onboard allowing communication over a Local Area Network via Wi-Fi. A selection of hardware configurations are discussed, including the use of conventional Wi-Fi and long range Ubiquiti airMAX wireless routers. Both software and hardware in the loop testing is discussed, in addition to the ability to to perform control from Matlab/Simulink. With all the infrastructure in place, algorithms can be rapidly prototyped. As an example use of the system, a quad-rotor visually tracks a robot while using a remote Matlab installation for image processing and control.

关键词： Autopilot rapid prototyping algorithm development hardware in the loop software in the loop invariant object recognition Ethernet Networks

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development and validation of the AFIT scene and sensor emulator for testing (ASSET) 28

Development and validation of the AFIT scene and sensor emul...

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28th Conference on Infrared Imaging Systems: Design, Analysis, Modeling, and Testing

作者： Young, Shannon R. Steward, Bryan J. Gross, Kevin C. Department of Engineering Physics Air Force Institute of Technology WPAFB OH United States

ISBN: (纸本)9781510608573

ASSET is a physics-based model used to generate synthetic data sets of wide field of view (WFOV) electro-optical and infrared (EO/IR) sensors with realistic radiometric properties, noise characteristics, and sensor artifacts. It was developed to meet the need for applications where precise knowledge of the underlying truth is required but is impractical to obtain for real sensors. For example, due to accelerating advances in imaging technology, the volume of data available from WFOV EO/IR sensors has drastically increased over the past several decades, and as a result, there is a need for fast, robust, automatic detection and tracking algorithms. Evaluation of these algorithms is difficult for objects that traverse a wide area (100-10,000 km) because obtaining accurate truth for the full object trajectory often requires costly instrumentation. Additionally, tracking and detection algorithms perform differently depending on factors such as the object kinematics, environment, and sensor configuration. A variety of truth data sets spanning these parameters are needed for thorough testing, which is often cost prohibitive. The use of synthetic data sets for algorithm development allows for full control of scene parameters with full knowledge of truth. However, in order for analysis using synthetic data to be meaningful, the data must be truly representative of real sensor collections. ASSET aims to provide a means of generating such representative data sets for WFOV sensors operating in the visible through thermal infrared. The work reported here describes the ASSET model, as well as provides validation results from comparisons to laboratory imagers and satellite data (e.g. Landsat-8). © 2017 COPYRIGHT SPIE.

关键词： Sensors Earth observing sensors Landsat Cameras Image sensors algorithm development Data modeling Clouds Image resolution Visible radiation Automatic tracking Detection and tracking algorithms Imaging technologies Infrared imaging Infrared radiation

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Open standard development platforms for distributed sensor networks

Open standard development platforms for distributed sensor n...

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Conference on Unattended Ground Sensor Technologies and Applications IV

作者： Merrill, W Sohrabi, K Girod, L Elson, J Newberg, F Kaiser, W Sensoria Corp Culver City CA 90230 USA

ISBN: (纸本)0819444936

In the development of distributed security sensor networks a large variety of prototype systems have been implemented and tested. However these systems tend to be developer specific and require substantial overhead in demonstrating more than one application. To bridge the gap between embedded, networked. systems and desktop simulation environments, systems are necessary which are easily deployable and allow extended operation of distributed sensor networks, while allowing the flexibility to quickly test and evaluate a variety of operational algorithms. To enable fast optimization by leveraging the widest development community, open standards for such a portable development system are desired. An open development system allows individual developers and small groups to focus on and optimize specific aspects of a distributed sensor network within realistic deployment constraints, prior to complete integration and deployment of a system within a specific application. By providing an embedded sensor and processing platform with integrated wired and wireless networking, a modular software suite separating access and control of individual processes, and open APIs, algorithm development and software optimization can be greatly accelerated and more robustly tested. To meet the unique needs of distributed sensor network applications, additional separation must be provided between the access to various subsystems, for example real-time embedded control versus tasks with less stringent timing requirements. An open platform that separates these requirements allows developers to accelerate testing and development of applications by focusing on individual components of the distributed sensor system, such as target tracking or low power networking. The WINS NG 2.0 developer's platform, provided by Sensoria Corporation for the DARPA/ITO Sensor Information Technology (SensIT) program, provides one example of such a system. This systems bridge the gap between dedicated desktop develop

关键词： Sensors Standards development Sensor networks Sensing systems algorithm development Distributed computing Software development Telecommunications Control systems Embedded systems

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development of a Testbed for Laboratory Validation of Navigation, Estimation, and Sensing algorithms

Development of a Testbed for Laboratory Validation of Naviga...

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作者： Simon, Andrew Blake Texas A&M University

学位级别：硕士

Laboratory validation is an important step in the development of new navigation and estimation algorithms. The laboratory validation process often requires the simulation and/or emulation of vehicles, sensors, and operational environments. At Texas A&M University’s Land, Air, and Space Robotics (LASR) Laboratory, robotics is utilized to provide the necessary motion and sensing capabilities to meet this end. A new robotic platform - the Navigation, Estimation, and Sensing Testbed (NEST) - was developed for the LASR Laboratory to aid the algorithm testing and validation process. NEST combines a suite of sensors, powerful onboard computer, rechargeable battery, and supporting power electronics into a compact, modular chassis. The result is a versatile, reusable vehicle emulation and sensing platform that can be applied to a variety of projects and operated on its own or in conjunction with other robotic platforms and computing units. NEST’s hardware and software are discussed, along with typical utilization within the laboratory.

关键词： algorithm development hardware-in-the-loop testing simulation emulation laboratory validation robotics testbed navigation estimation sensing Thesis

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Visualizing local vector field topology

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JOURNAL OF ELECTRONIC IMAGING 2000年第4期9卷 356-367页

作者： Scheuermann, G Hamann, B Joy, KI Kollmann, W Univ Calif Davis Dept Comp Sci Ctr Image Proc & Integrated Computing Davis CA 95616 USA Univ Calif Davis Dept Mech & Aeronaut Engn Davis CA 95616 USA

The visualization of vector fields has attracted much attention over the last decade due to the vast variety of applications in science and engineering. Topological methods have been used intensively for global structure extraction and analysis. Recently, there has been a growing interest in local structure analysis due to its connection to automatic feature extraction and speed. We present an algorithm that extracts local topological structure of arbitrary regions in a two-dimensional vector field. It is based on a mathematical analysis of the topological vector field structure in these regions. The algorithm deals with piecewise linear vector fields and arbitrary polygonal regions. We have tested the algorithm for well known analytic Vector fields and data sets resulting from computational fluid dynamics. (C) 2000 SPIE and IS&T. [S1017-9909(00)01104-1].

关键词： Visualization Visual analytics Computational fluid dynamics Lead Mechanics 3D image processing algorithm development Analytical research Image processing Standards development

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Extensible mark-up language file definition for structured acquisition data storage and transfer

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MEASUREMENT 2008年第3期41卷 320-326页

作者： Bras, Nuno B. Ramos, Pedro M. Serra, A. Cruz Univ Tecn Lisbon Inst Super Tecn Inst Telecommun IST P-1049001 Lisbon Portugal Univ Tecn Lisbon Inst Super Tecn Dept Elect & Comp Engn IST P-1049001 Lisbon Portugal

In many measuring applications where several acquisitions are needed, resulting measurement data could be more useful if measuring information is included as part of resulting data. For example, in advanced measurement algorithms development, it is common to acquire large amounts of organized data that should be clearly identified for automatic post processing. This paper proposes a new eXtensible Mark-up Language (XML) file structure, to be used as a data log file in generic measurement procedures. Benefits like web easiness, low file size requirements and flexible handling by several software platforms are introduced. Specifically developed software to work with the proposed XML structure is presented and the typical acquisition and processing architecture is presented. To demonstrate the proposed XML structure ability, a simple application example applied to power quality assessment was developed. (C) 2006 Elsevier Ltd. All rights reserved.

关键词： measurement software extensible mark-up language (XML) algorithm development

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Comparison between MERIS and regional high-level products in European seas

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REMOTE SENSING OF ENVIRONMENT 2014年 140卷 378-395页

作者： D'Alimonte, Davide Zibordi, Giuseppe Kajiyama, Tamito Berthon, Jean-Francois Univ Nova Lisboa Fac Ciencias & Tecnol Dept Informat Ctr Inteligencia Artificial Quinta Da Torre Caparica Portugal Commiss European Communities Joint Res Ctr Inst Environm & Sustainabil I-21020 Ispra Italy Univ Nova Lisboa Fac Ciencias & Tecnol Ctr Invest Informat & Tecnol Informaca Quinta Da Torre Caparica Portugal

Standard ocean color data products from the Medium Resolution Imaging Spectrometer (MERIS) are compared with equivalent regional products in European seas exhibiting different bio-optical properties: the northern Adriatic Sea, the Baltic Sea and the Western Black Sea (ADRS, BLTS and BLKS, respectively). Investigated quantities are: 1) the algal-2 pigment index, alg2;2) the composite-absorption coefficient of yellow substance and non-pigmented particles at 442 nm, a(dg);and 3) the concentration of the total suspended matter, TSM. Regional data products are created using ocean color inversion schemes based on MultiLayer Perceptron (MLP) neural nets trained with field measurements from the Coastal Atmosphere and Sea Time Series (CoASTS) and Bio-Optical mapping of Marine Properties (BiOMaP) programs. MLP input is the remote sensing reflectance Res at MERIS center-wavelengths specifically selected for different water types in view of minimizing the perturbing effects of inaccurate atmospheric correction on the retrieval of regional data products. A new method is also proposed to define the applicability of regional MLPs to input Res. Results indicate that MERIS alg2 values tend to overestimate the equivalent quantity computed with MLP regional algorithms. The agreement between MERIS and regional TSM data products is significantly better than that reported for alg2 and ad, especially for BLKS. Findings highlight the relevance of using regional inversion schemes to evaluate standard products over extended oceanographic regions as a complement to the analysis of match-ups between marine products measured in situ and derived from space-born data. (C) 2013 Elsevier Inc. All rights reserved.

关键词： Ocean color remote sensing Regional algorithms algorithm development

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Digital Filter Design Using Computer Algebra Systems

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CIRCUITS SYSTEMS AND SIGNAL PROCESSING 2010年第1期29卷 51-64页

作者： Lutovac, Miroslav D. Certic, Jelena D. Milic, Ljiljana D. Univ Belgrade Sch Elect Engn Belgrade 11000 Serbia State Univ Novi Pazar Novi Pazar 36300 Serbia

Digital filter design can be performed very efficiently using modern computer tools. The drawback of the numeric-based tools is that they usually generate a tremendous amount of numeric data, and the user might easily lose insight into the phenomenon being investigated. The computer algebra systems successfully overcome some problems encountered in the traditional numeric-only approach. In this paper, we introduce an original approach to algorithm development and digital filter design using a computer algebra system. The main result of the paper is the development of an algorithm for an infinite impulse response (IIR) filter design that, theoretically, is impossible to be implemented using the traditional approach. We present a step-by-step procedure which includes derivations of closed-form expressions for (1) the transfer functions of the implemented digital filter which contains the algebraic loop;(2) the closed-form expression for computing the number of requested iteration steps;and (3) the error function representing the difference of the output sample values of the new filter and that of the conventional filter. We demonstrate how one can use some already-known multiplierless digital filter as a start-up filter to design a new digital filter whose passband edge frequency can be simply moved by using a single parameter. As a result, we obtain a multiplierless IIR filter, which belongs to the family of low-power digital filters where multipliers are replaced with a small number of adders and shifters.

关键词： Symbolic signal processing Algebraic loop algorithm development Modeling Implementation Multiplierless IIR filter

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Fast algorithm for motion estimation under the varying interframe brightness characteristics

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JOURNAL OF ELECTRONIC IMAGING 2005年第4期14卷 043013.1-043013.7页

作者： Ahmadianpour, F Ahmad, MO Concordia Univ Dept Elect & Comp Engn Montreal PQ H3G 1M8 Canada

A fast two-stage scheme for the search of the motion vectors under varying interframe brightness characteristics, referred to as enhanced motion vectors, is devised. In the first stage of the scheme, a given block and the corresponding blocks in the search window are mapped into the sum-of-pixel value domain, where two subsets of candidate blocks, one consisting the blocks having the DC values closest to the DC value of the block of interest and the other consisting of those having the farthest DC values are selected. In the second stage, the motion vector is determined by employing these subsets and using the mean square error as the matching criterion. Experimental results show that the proposed technique provides a high prediction accuracy with a low computational load. (c) 2005 SPIE and IS&T.

关键词： Motion estimation Video algorithm development Computer engineering Computer simulations

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