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On-platform radar and optical track fusion

On-platform radar and optical track fusion

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Asilomar conference on Signals, systems & Computers

作者： M.J. Sorell M.L. Krieg C.V. Stewart Microwave Radar Division Surveillance Research Laboratory Department of Defence Defence Science and Technology Organisation Australia Center of Excellence in Command Control Communications and Intelligence School of Information Technology and Engineering George Mason University Fairfax VA USA

The Australian Defence Science and Technology Organisation is developing a single-platform sensor fusion test-bed based around an experimental X-band generic pulse Doppler radar. Initial research will examine real-time fusion of amplitude monopulse radar azimuth and elevation and video position estimates and the tracking ability of the combined sensor system. The addition of further signal processing and sensors will allow experimental verification of a variety of sensor fusion and management algorithms. Examples of preliminary data are shown and the continuing development of the test-bed and its applications are discussed.< >

关键词： Laser radar Radar tracking Doppler radar Sensor fusion Testing Signal processing algorithms optical sensors optical signal processing Australia optical pulses

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Computer architectures for a real-time passive ranging algorithm

Computer architectures for a real-time passive ranging algor...

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conference on Digital Avionics systems (DASC)

作者： B. Sridhar R.E. Suorsa NASA Ames Research Center Moffett Field CA USA

The complexity of rotorcraft missions involving operations close to the ground result in high pilot workload. In order to allow a pilot time to perform mission-oriented tasks, sensor-aiding and automation of some of the guidance and control functions is highly desirable. Images from an electro-optical sensor provide a covert way of detecting objects in the flight path of a low-flying helicopter. Passive ranging consists of processing a sequence of images using techniques based on optical flow computation and recursive estimation. The passive ranging algorithm has to extract obstacle information from imagery at rates varying from five to thirty or more frames per second depending on the helicopter speed. We have implemented and tested the passive ranging algorithm off-line using helicopter images. However, the real-time data and computational requirements of the algorithm are beyond the capability of any off-the-shelf microprocessor or digital signal processor. This paper describes the computational requirements of the algorithm and uses parallel processing technology to meet this requirement. Various issues in the selection of a parallel processing architecture are discussed and four different computer architectures are evaluated regarding their suitability to process the algorithm in real-time. Based on this evaluation, we conclude that real-time passive ranging is a realistic goal and can be achieved within a short time.< >

关键词： Computer architecture Signal processing algorithms Helicopters optical computing Parallel processing Automation Automatic control Electrooptic devices Image sensors Object detection

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Acquisition, Tracking, and Pointing vi

Acquisition, Tracking, and Pointing VI

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Acquisition, Tracking, and Pointing vi

ISBN: (纸本)081940862X

This conference proceedings contain 48 papers. Topics covered include: Tracking systems;Image acquisition;Image processing;optical systems;optical filters;Range measurement;Optoelectric systems;Pointing systems;Control systems;Telescopes;Gimbals;Simulation;algorithms;Computer simulation;Missile interceptors;Target acquisition;Platform stabilization;Kalman filtering;Mirrors;and Autotrack systems.

关键词： optical systems

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THERMAL AND RANGE FUSION FOR A PLANETARY ROVER 6

THERMAL AND RANGE FUSION FOR A PLANETARY ROVER

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CONF ON MOBILE ROBOTS 6

作者： CAILLAS, C Central and Technical Establishment for Armament (France)

ISBN: (纸本)081940750X

This paper describes how fusion between thermal and range imaging allows us to discriminate different types of materials in outdoor scenes. First, we analyze how pure viSiOfl segmentation algorithms applied to thermal images allow discriminating materials such as rock and sand. Second, we show how combining thermal and range information allows us to better discriminate rocks from sand. Third, as an application, we examine how an autonomous legged robot can use these techniques to explore other planets.

关键词： Image segmentation Thermography Sensors Cameras Mobile robots Image fusion Laser range finders Infrared sensors Image processing algorithms and systems Image sensors

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Medical Imaging vi: PACS Design and Evaluation

Medical Imaging VI: PACS Design and Evaluation

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Medical Imaging vi: PACS Design and Evaluation

ISBN: (纸本)0819408069

This conference proceedings contains 69 papers. The topics discussed are medical communications networks;teleradiology;image manipulation and processing for picture archiving and communication systems (PACS);medical diagnostic image support systems (MDIS);image archiving;standards;modeling;clinical imaging;workstations and displays;interfacing issues;systems integration;technological trends;network management;image compression;hospital information systems;information retrieval systems;narrowband networks;broadband networks;and file transfer.

关键词： Computer networks

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optical communication architectures for multimedia conferencing in distributed systems 12

Optical communication architectures for multimedia conferenc...

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12th International conference on Distributed Computing systems, ICDCS 1992

作者： Ramanathan, Srinivas Rangan, P. Venkat vin, Harrick M. Kaeppner, Thomas Multimedia Laboratory Department of Computer Science and Engineering University of California San DiegoCA92093-0114 United States IBM European Networking Center Heidelberg Germany

ISBN: (纸本)0818628650

The design of techniques and protocols for media mixing and communication architectures that optimize the performance of media mixing are discussed. The performance of monostage and multistage techniques for mixing are compared. Centralized and distributed architectures are analyzed for their suitability to both monostage and multistage media mixing, and hierarchical architectures that significantly reduce bandwidth consumption are presented. algorithms for designing hierarchies that optimize real-time end-to-end delays and a packet train protocol in which the routing nodes can be used as mixers are proposed. © 1992 IEEE.

关键词： Mixing

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Issues and solutions for interfacing a PACS database with an RIS

Issues and solutions for interfacing a PACS database with an...

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Medical Imaging vi: PACS Design and Evaluation

作者： Breant, Claudine M. Taira, Ricky K. Tashima, Gregory H. Huang, H.K. UCLA Sch. of Medicine Los Angeles CA USA

ISBN: (纸本)0819408069

We describe the interfacing methods between our departments RIS (Radiological information System) and PACS database. Sharing information has become an increasingly important issue for both systems. RIS study information should be available at the PACS workstation to complete the image description. Patient scheduling, admission and discharge information are critical to PACS for improving image routing and storage management algorithms. The design of the interface between the RIS and the PACS database involves the development of some standardization methods. These include the network communication protocol between the two database servers, the language mapping operations, the database result format and the error handling. The implementation of the interface is in two steps. In the first one, a subset of RIS data is automatically transmitted to the PACS database when some relevant events occur in the RIS. In a second phase, the user at the PACS workstation can directly initiate queries to the RIS. The PACS SQL server (UNIX based) sends SQL network requests as ASCII text to the RIS MUMPS database server (VAX based). The RIS server translates the SQL requests to MUMPS, executes the statements and returns ASCII results to the SQL server. We have been able to exchange information between the RIS and the PACS display programs. RIS text reports can be displayed on PACS workstations. RIS information can be used into pre-fetch algorithms.

关键词： Hospital data processing

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4th International Parallel Architectures and Languages Europe conference, PARLE 1992

4th International Parallel Architectures and Languages Europ...

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4th International Parallel Architectures and Languages Europe conference, PARLE 1992

ISBN: (纸本)9783540555995

The proceedings contain 76 papers. The special focus in this conference is on Parallel Architectures and Languages Europe. The topics include: A parallel computer system for advanced information processing;a decompositional approach to the design of efficient parallel programs;space-efficient parallel merging;on embedding interconnection networks into rings of processors;asynchronous mobile processes and graph rewriting;PTAH introduction to a new parallel architecture for highly numeric processing;optimal algorithms for dissemination of information in generalized communication modes;efficient parallel algorithms on interval graphs;a SIMD computer performing the low and intermediate levels of image processing;1-dimensional parallel FFT benchmark on SUPRENUM;on designing fault-tolerant extensions with optimal fanout for complete bipartite networks;application-specific deadlock free wormhole routing on multicomputers;scalability problems in multiprocessors with private caches;promises and issues in optical computing;a model to design reusable parallel software components;extensibility and reuse of object-oriented synchronization components;using parallelism and pipeline for the optimisation of join queries;performance evaluation of parallel transaction processing in shared nothing database systems;explicit expression of multidimensional data parallelism;programming massively parallel architectures with sequential object oriented languages;a new program transformation to minimise communication in distributed memory architectures;distributed termination enforcement;verification of systolic architecture designs;reduction operators in alpha;an operational semantics for a parallel functional language with continuations;a concurrent and distributed extension of scheme;new techniques for cycle shrinking and loop restructuring techniques for thrashing problem.

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Use of the Hough transform to separate merged text/graphics in forms

Use of the Hough transform to separate merged text/graphics ...

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International conference on Pattern Recognition

作者： J.M. Gloger Institute for Information Technology Daimler Benz Aerospace Ulm Germany

Presents a new method for the separation of merged text/form-structure components in forms. The technique described uses a modified version of the Hough transform to detect the structure of the form. The closed contours of the connected components are approximated by piecewise linear line segments. The parameters of the Hesse normal form of each line segment serve as input for the Hough transform. Compared to the vectorized boundary of characters, the lines of the form structure consist of appreciable more line segments with the same orientation and distance. So, the problem of the form structure detection in the database of line segments can be reduced to the detection of local peaks in the Hough space. Subsequent processing steps reconstruct the remaining contour fragments to characters.< >

关键词： Graphics information technology Ear Databases optical filters Image segmentation Search methods Computational efficiency Image analysis Iterative algorithms

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On the implementation of RBF technique in neural networks 91

On the implementation of RBF technique in neural networks

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1991 conference on Analysis of Neural Network Applications, ANNA 1991

作者： Musavi, M.T. Paris, K.B. Chan, K.H. Alimed, W. Electrical and Computer Engineering University of Maine OronoME04469 United States Brown University ProvidenceRI United States Electro-Optical Information Systems Santa MonicaCA United States

ISBN: (纸本)0897914325

An approach for the implementation of the Radial Basis Function (RBF) technique is presented and applied to a networlf of the appropriate architecture. The paper explores the extent to which the number of RBF nodes can be reduced without significantly affecting the overall training error. This is accomplished through an effective clustering algorithm that shall be described in detail. Emphasis is also placed on the problems faced by a technique that has been proved superior to the more traditional training algorithms, particularly in terms of processing speed and solvability of nonlinear patterns. Solutions are consequently proposed in view of making RBF a more efficient method for interpolation and classification purposes. © 1991 ACM.

关键词： Clustering algorithms

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