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检索条件"主题词=Detection and tracking algorithms"

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GENETIC SEARCH OF A GENERALIZED HOUGH TRANSFORM SPACE

GENETIC SEARCH OF A GENERALIZED HOUGH TRANSFORM SPACE

引用

CONF ON ADAPTIVE AND LEARNING SYSTEMS

作者： MONTANA, DJ Bolt Beranek & Newman Inc. (United States)

ISBN: (纸本)0819408719

We use a Generalized Hough transform (GHT) to detect and track instances of a class of sonar signals. This class consists of a four-dimensional set of curves and hence requires a four- dimensional transform space for the GHT. Many of the signals we need to detect are very weak. Such signals yield peaks in the transform space which are both very narrow and not too far above the random background variations. Finding such peaks is difficult. Exhaustive search over a predetermined discretization of the transform space will yield a nearly optimal point for a sufficiently fine discretization. However, even with an intelligently chosen discretization, exhaustive search requires searching over (and hence evaluating) many points in the transform space. We have therefore developed a genetic algorithm to more efficiently search the transform space. Designing the genetic algorithm to work properly has required experimentation with a number of its parameters. The most important of these are (1) the representation, (2) the population size, and (3) the number of runs.

关键词： Genetic algorithms Signal detection Hough transforms Genetics Algorithm development detection and tracking algorithms Computer programming Image segmentation Binary data Signal to noise ratio

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MARVEL - A SYSTEM THAT RECOGNIZES WORLD LOCATIONS 6

MARVEL - A SYSTEM THAT RECOGNIZES WORLD LOCATIONS

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CONF ON MOBILE ROBOTS 6

作者： BRAUNEGG, DJ Artificial Intelligence Lab./MIT (United States)

ISBN: (纸本)081940750X

To use a world model, a mobile robot must be able to determine its own position in the world. To support truly autonomous navigation, I present MARVEL, a system that builds and maintains its own models of world locations and uses these models to recognize its world position from stereo vision input. MARVEL is designed to be robust with respect to input errors and to respond to a gradually changing world by updating its world location models. In over 1000 recognition tests using real-world data, MARVEL yielded a false negative rate under 10% with zero false positives. MARVEL also fits into a world modeling system under development.

关键词： Data modeling Visual process modeling Mobile robots Navigation systems Cameras Coastal modeling detection and tracking algorithms Stereo vision systems Databases Systems modeling

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COMPARATIVE PERFORMANCE OF ARTIFICIAL NEURAL NETWORKS AND CONVENTIONAL METHODS FOR MULTISPECTRAL IMAGE FUSION 3

COMPARATIVE PERFORMANCE OF ARTIFICIAL NEURAL NETWORKS AND CO...

引用

3RD ANNUAL INTERNATIONAL CONF ON APPLICATIONS OF ARTIFICIAL NEURAL NETWORKS

作者： KAGEL, JH McDonnell Douglas Electronic Systems Co. (United States)

ISBN: (纸本)0819408743

This paper compares the performance of an artificial neural network technique to that of two conventional techniques in fusing (classifying) multispectral imagery. The true classification error rate is estimated by use of the k-fold cross-validation technique for a Bayesian classifier, a binary tree classifier, and a backpropagation neural network. The cascade correlation neural network is also described and its theory of operation is compared to that of the backpropagation neural network.

关键词： Neural networks Error analysis Multispectral imaging Artificial neural networks Image fusion detection and tracking algorithms Image classification Matrices Pattern recognition Statistical analysis

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STATISTICAL TECHNIQUES FOR NOISE REMOVAL FROM VISUAL IMAGES

STATISTICAL TECHNIQUES FOR NOISE REMOVAL FROM VISUAL IMAGES

引用

3RD CONF ON HYBRID IMAGE AND SIGNAL PROCESSING

作者： ALLRED, LG KELLY, GE Air Force Ogden Air Logistics Ctr. (United States) Air Force Ogden Air Logistics Ctr (United States)

ISBN: (纸本)0819408670

The median operator has been demonstrated to be a very effective method for restoring recognizable images from very noisy image data. The power of the median operator stems from its non-algebraic formulation, which prevents erroneous data corrupting the final color computation. A principal drawback is that the median operator replaces all data, erroneous or not, the result being a net loss of information. This paper presents alternative statistical outlier techniques by which erroneous data is readily recognized, but valid data usually remains unchanged. The result is an effective noise removal algorithm with reduced loss of information.

关键词： Cameras Signal processing Visualization Image processing Video detection and tracking algorithms Digital filtering Image enhancement Modulation transfer functions Optical filters

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RECOGNITION OF MOVING VEHICLES USING DIRECTIONAL-TEMPORAL PLANE TRANSFORM

RECOGNITION OF MOVING VEHICLES USING DIRECTIONAL-TEMPORAL PL...

引用

CONF ON INTELLIGENT ROBOTS AND COMPUTER VISION 10 : algorithms AND TECHNIQUES

作者： TANIGUCHI, H FURUSAWA, H SEKI, A IKEBATA, S Mitsubishi Electric Corp. (Japan)

ISBN: (纸本)0819407445

Traffic flow measurement systems, which recognize vehicles and measure traffic parameters by image processing, are researched. We propose a new recognition method for moving vehicles using directional-temporal plane transform (DTT) for the system. DTT is a transformation from spatiotemporal data to 2-D data onto a directional-temporal plane. The transformation is done by projecting feature data of vehicles to a directional axis which is roughly parallel to the moving loci, and by placing the projected data stream side by side in temporal order. We also show an effective extraction algorithm of vehicles from the 2-D data obtained by DTT. Experimental results using real images demonstrate the effectiveness of this method.

关键词： Image processing detection and tracking algorithms Robot vision Robots Machine vision Computer vision technology Cameras Edge detection Magnetic sensors Roads

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DESIGN AND EVALUATION OF MULTIPLE HYPOTHESIS tracking FOR INFRARED SURVEILLANCE SYSTEMS

DESIGN AND EVALUATION OF MULTIPLE HYPOTHESIS TRACKING FOR IN...

引用

4TH CONF ON THE SIGNAL AND DATA PROCESSING OF SMALL TARGETS 1992

作者： BLACKMAN, S DEMPSTER, R BROIDA, T Hughes Aircraft Co. (United States)

ISBN: (纸本)0819408638

This paper describes an overall methodology for the application of a multiple hypothesis tracking (MHT) algorithm to the IR surveillance system problem of tracking dim targets in a heavy clutter or false alarm background. First, It discusses the manner in which the detection and tracking systems are jointly designed to optimize performance. Next, it presents approximate methods that can conveniently be used for preliminary system design and performance prediction. Finally, it discusses the use of a detailed Monte Carlo simulation for final system evaluation and presents results illustrating the proposed methods and comparing predicted and simulation performance.

关键词： Monte Carlo methods Signal processing Infrared imaging Signal to noise ratio Surveillance systems Data processing Target detection Infrared search and track detection and tracking algorithms Infrared sensors

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SELF-GROWING NEURAL NETWORK ARCHITECTURE USING CRISP AND FUZZY ENTROPY

SELF-GROWING NEURAL NETWORK ARCHITECTURE USING CRISP AND FUZ...

引用

1ST CONF ON SCIENCE OF ARTIFICIAL NEURAL NETWORKS

作者： CIOS, KJ NASA Lewis Research Ctr. and Ohio Aerospace Institute (United States)

ISBN: (纸本)0819408751

The paper briefly describes the self-growing neural network algorithm, CID3, which makes decision trees equivalent to hidden layers of a neural network. The algorithm generates a feedforward architecture using crisp and fuzzy entropy measures. The results for a real-life recognition problem of distinguishing defects in a glass ribbon, and for a benchmark problem of telling two spirals apart are shown and discussed.

关键词： Neural networks Evolutionary algorithms detection and tracking algorithms Fuzzy logic Glasses Machine learning Network architectures Artificial neural networks Data hiding Tin

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APPLICATION OF ARTIFICIAL NEURAL NETWORKS TO ATP FUNCTIONS

APPLICATION OF ARTIFICIAL NEURAL NETWORKS TO ATP FUNCTIONS

引用

6TH CONF ON ACQUISITION, tracking, AND POINTING

作者： ELBAUM, M Electro-Optical Sciences Inc. (United States)

ISBN: (纸本)081940862X

We discuss the applicability of multi-layer Neural Networks (NN) to automatic target classification in the challenging environment of Acquisition-tracking-Pointing (ATP) systems. The merits of NN are discussed in the context of a limited training data base, which is characteristic of practical ATP situations. A computational method is reviewed which allows the quantification of large-scale NN performance for the important small-sample case. In addition, Perceptron learning for the classification of target stochastic images governed by the Poisson distribution is examined with the aid of computer simulations.

关键词： Acquisition tracking and pointing Error analysis Image classification Stochastic processes Data modeling detection and tracking algorithms Neural networks Artificial neural networks Target acquisition Signal processing

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DISTRIBUTED PREdetection OF MOVING POINT TARGETS WITH ANALOG VLSI

DISTRIBUTED PREDETECTION OF MOVING POINT TARGETS WITH ANALOG...

引用

CONF ON INFRARED READOUT ELECTRONICS

作者： BARTOLAC, TJ Aerojet Electronic Systems Div. (United States)

ISBN: (纸本)0819408492

When large-field IR sensors are quite distant from the scene, targets appear as points, so detection is based on their motion, rather than their structure. The appearance of background and clutter bright points, although eventually rejected as nontargets, unnecessarily burdens tracking algorithms. Typical approaches involve eliminating background prior to tracking, or only looking within dynamic search boxes based on previous-frame target observations. This presentation describes a method for distributed predetection of points due to moving targets, in which background points are be automatically rejected, and only those detector returns that are most likely to be from targets are be provided to the tracking algorithm. The paper discusses the retinally inspired concepts behind the proposed method, analytical and empirical evaluations of its performance, and a hardware implementation based on Mead's (1989) analog VLSI circuits, resulting in a fine-grained-parallel architecture suitable for on-focal-plane applications.

关键词： Analog electronics Sensors Target detection Capacitors Resistors detection and tracking algorithms Infrared radiation Very large scale integration Resistance Signal detection

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DEMONSTRATION OF CLUTTER REDUCTION AND AIRCRAFT detection IN MULTISPECTRAL DATA

DEMONSTRATION OF CLUTTER REDUCTION AND AIRCRAFT DETECTION IN...

引用

4TH CONF ON THE SIGNAL AND DATA PROCESSING OF SMALL TARGETS 1992

作者： HOFF, LE WINTER, EM Naval Ocean Systems Ctr. (United States) Technical Research Associates Inc. (United States)

ISBN: (纸本)0819408638

The DARPA multi-spectral infrared camera (MUSIC) was used for a series of experiments in Australia and Maui, Hawaii in 1991. The Maui experiments, conducted from a high mountain, concentrated on the detection of aircraft. The detection of air vehicles without the use of temporal motion (such as the case of a head-on approaching air vehicle) is a challenging problem when background clutter is present. The technique investigated was not dependent upon either the angular motion or the spectral signature of the aircraft. This approach exploits the differential transmission of the atmosphere in neighboring long wave infrared bands. This differential transmission between the target and background `colors' the background relative to the target and allows its removal. This technique was demonstrated on many examples of MUSIC data collected in Maui, Hawaii. Targets approaching the sensor head-on were successfully detected against clouds and other backgrounds using spectral along with spatial techniques. Several different algorithms were investigated and results are compared.

关键词： Sensors Clouds Target detection detection and tracking algorithms Calibration Infrared radiation Signal processing Long wavelength infrared Signal to noise ratio Optical filters

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