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

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RELATIONAL TEMPLATE MATCHING ALGORITHM FOR FLIR AUTOMATIC TARGET RECOGNITION

RELATIONAL TEMPLATE MATCHING ALGORITHM FOR FLIR AUTOMATIC TA...

引用

CONF ON ARCHITECTURE, HARDWARE, AND FORWARD-LOOKING INFRARED ISSUES IN AUTOMATIC TARGET RECOGNITION

作者： KRAMER, AP PERSCHBACHER, D JOHNSTON, R KIPP, T Alliant Techsystems Inc. (United States) U.S. Army Research Lab. (United States)

Under the Army Night Vision & Electronic Sensors Directorate and the Army Research Laboratory (S3I) sponsored ATR Relational Template Matching (ARTM) program, we have developed a novel model-based forward-look... 详细信息

ISBN: (纸本)0819411930

Under the Army Night Vision & Electronic Sensors Directorate and the Army Research Laboratory (S³I) sponsored ATR Relational Template Matching (ARTM) program, we have developed a novel model-based forward-looking infrared (FLIR) automatic target recognition (ATR) algorithm with superior performance over other model-based and template matching algorithms. The ARTM algorithm represents a significant advance over other approaches because its performance is relatively insensitive to the extreme variations of target signatures in FLIR imagery. The algorithm has been extensively evaluated in Army-sponsored competitive tests on low-depression ground target scenarios. The ARTM algorithm correctly recognizes target signatures at less than one-half the signal-to-noise level required by other approaches. Also the algorithm performs consistently over signature variations with up to 30 percent shape error.

关键词： detection and tracking algorithms Algorithm development Computer aided design Target recognition Solid modeling Forward looking infrared Automatic target recognition Performance modeling Sensors Model-based design

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TRANSMISSION ERROR-detection, RESYNCHRONIZATION, AND ERROR CONCEALMENT FOR MPEG VIDEO DECODER

TRANSMISSION ERROR-DETECTION, RESYNCHRONIZATION, AND ERROR C...

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Meeting on Visual Communications and Image Communication 93

作者： LEE, SH YOUN, JS JANG, SH JANG, SH KOREA TELECOM SYST DEV CTR SEOULSOUTH KOREA

ISBN: (纸本)0819413690

In this paper, we propose an error detection and a resynchronization algorithm in the decoding process of VLC and an error concealment technique for MPEG video decoder. A transmission error causes an error propagation in compressed video data, which in turn leads to objectionable degradation in picture quality. In order to minimize the effect of error propagation, we should resynchronize and recover the differentially coded symbols as fast as possible. The proposed algorithm is capable of resynchronizing the VLC until at least the next macroblock. Concerning the error concealment algorithm, more emphasis is laid upon the concealment of erroneous intra mode MBs. The proposed technique shows better performance than any other previous techniques especially in I-pictures and scene change pictures.

关键词： Error analysis Video Video compression Video processing Algorithm development Data communications detection and tracking algorithms Visualization Computer programming Video coding

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DYNAMIC SENSOR-BASED FAULT-detection FOR ROBOTS

DYNAMIC SENSOR-BASED FAULT-DETECTION FOR ROBOTS

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1993 SPIE Technical Conference on Telemanipulator Technology and Space Telerobotics

作者： VISINSKY, ML CAVALLARO, JR WALKER, ID RICE UNIV DEPT ELECT & COMP ENGNHOUSTONTX 77251

ISBN: (纸本)0819413224

Fault detection and fault tolerance are increasingly important for robots in space or hazardous environments due to the dangerous and often inaccessible nature of these environs. We have previously developed algorithms to enable robots to autonomously cope with failures of critical sensors and motors. Typically, the detection thresholds used in such algorithms to mask out model and sensor errors are empirically determined and are based on a specific robot trajectory. We have noted, however, that the effect of model and sensor inaccuracy fluctuates dynamically as the robot moves and as failures occur. The thresholds, therefore, need to be more dynamic and respond to the changes in the robot system so as to maintain an optimal bound for sensing real failures in the system versus misalignment due to modeling errors. In this paper, we analyze the reachable measurement intervals method of computing dynamic thresholds and explore its applicability to robotic fault detection.

关键词： Robots Sensors Algorithm development Robotics Computer programming Matrices Robotic systems Motion models Systems modeling detection and tracking algorithms

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COLOR TEXTURE MODELS FOR MACHINE VISION 4

COLOR TEXTURE MODELS FOR MACHINE VISION

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CONF ON HUMAN VISION, VISUAL PROCESSING, AND DIGITAL DISPLAY 4

作者： KONDEPUDY, R HEALEY, G Univ. of California/Irvine (United States)

ISBN: (纸本)0819411469

We develop a physical model that characterizes the appearance of textured color surfaces in three dimensions. The model is derived from properties of surfaces and the physics of image formation. The color texture model describes the dependence of the spatial correlations within and between bands of a color image on surface reflectance, illumination, and the scene geometry. We show that there are important advantages in using color information for texture analysis. From our model, we derive an algorithm for recognizing instances of color textures independent of scene geometry. This algorithm is useful for the recognition of three dimensional objects and the segmentation of color images of three dimensional scenes. Experimental results are provided to confirm the model and to illustrate the performance of the algorithm.

关键词： Correlation function 3D modeling Image processing Sensors Visual process modeling 3D image processing Critical dimension metrology detection and tracking algorithms Image filtering Reflectivity

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IRES - AN EXPERT-SYSTEM FOR AUTOMATIC TARGET RECOGNITION FROM SHORT-DISTANCE INFRARED IMAGES

IRES - AN EXPERT-SYSTEM FOR AUTOMATIC TARGET RECOGNITION FRO...

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CONF ON ARCHITECTURE, HARDWARE, AND FORWARD-LOOKING INFRARED ISSUES IN AUTOMATIC TARGET RECOGNITION

作者： DEMATHELIN, M PERNEEL, C ACHEROY, M Carnegie Mellon Univ. (France) Royal Military Academy (Belgium)

ISBN: (纸本)0819411930

This paper presents an expert system for target recognition from short distance infrared images. This expert system first identifies the position and orientation of the target. The number of possible positions and orientations is extremely large, therefore, the solution space cannot be fully explored. A heuristic search algorithm is used instead to guide the expert system toward the solution in an efficient manner. Bayesian estimation theory and fuzzy logics are used to derive the knowledge combination rules used by the heuristic search algorithm. These rules are generic enough to be applied to other types of expert systems and to data fusion problems. Once the position and the orientation of the target have been found, the expert system simply tries to match parts of the image of the target with templates under the same position and orientation in order to identify the target.

关键词： Fuzzy logic Lithium Infrared imaging Infrared radiation Short wave infrared radiation Data fusion detection and tracking algorithms Protactinium Silicon Target recognition

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tracking A MOVING OBJECT WITH A 6-DOF MANIPULATOR

TRACKING A MOVING OBJECT WITH A 6-DOF MANIPULATOR

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CONF ON APPLICATIONS OF ARTIFICIAL INTELLIGENCE 1993 : MACHINE VISION AND ROBOTICS ( PREPRINTS )

作者： COTE, J GOSSELIN, C LAURENDEAU, D Univ. Laval (Canada)

ISBN: (纸本)0819412007

A new approach to calculate the inverse kinematic functions whose domain of solution is not limited to the manipulator's workspace is introduced. Using this approach every point in the Cartesian space leads to a real solution when used as data for the inverse kinematic problem. The solution gives the minimum distance between the end-effector and the prescribed point in the Cartesian space for a given orientation of the end-effector. The proposed inverse kinematic functions are of great interest for tracking, approach, and catching operations where the object to be reached or tracked by the manipulator is inside or outside the robot's workspace.

关键词： Kinematics Artificial intelligence Evolutionary algorithms Algorithm development detection and tracking algorithms Visualization Computer architecture Device simulation Matrices Radium

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APPLICATIONS OF SIGNAL AND DATA-PROCESSING TECHNOLOGY TO VEHICULAR TRAFFIC MONITORING

APPLICATIONS OF SIGNAL AND DATA-PROCESSING TECHNOLOGY TO VEH...

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5TH CONF ON SIGNAL AND DATA PROCESSING OF SMALL TARGETS

作者： BLACKMAN, SS BUSCH, MT CANTRELL, SW MUSIAL, CJ Hughes Aircraft Co. (United States)

ISBN: (纸本)0819411906

This paper describes how optical sensor signal processing and data association methods that have been developed for Aerospace applications can be applied to the traffic monitoring function of Advanced Traffic Management Systems (ATMS). It first discusses techniques that have been developed for background estimation and detection of vehicles on a roadway. Then, the transformation to tracking coordinates and the multiple target tracking (MTT) algorithm that produces traffic flow observation data are outlined. An extended Kalman filter that takes observed flow data from multiple sensor sites and produces flow estimates for an entire roadway is described and its application to incident detection discussed. Preliminary results using simulated and actual freeway data are presented. Finally, techniques for presenting this data to the user and the manner in which these signal and data processing techniques relate to an overall ATMS design are outlined.

关键词： Sensors Video Data processing Cameras Filtering (signal processing) Roads Image processing detection and tracking algorithms Signal processing Video surveillance

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ICONIC SYSTEM FOR OBJECT RECOGNITION AND ITS LOCATION DETERMINATION 3

ICONIC SYSTEM FOR OBJECT RECOGNITION AND ITS LOCATION DETERM...

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1993 ANNUAL INTERNATIONAL CONF ON AUTOMATIC OBJECT RECOGNITION

作者： POPOV, M REZNIK, A SHKWAR, A Kiev High Aviation Engineering School (Ukraine)

ISBN: (纸本)0819411965

The solution to the problem of constructing the system capable to recognize objects and to determine their coordinates via images is presented. The theoretical approach based on a set of features invariant to such affine plane transforms as the scale changes and rotations is developed. The algorithm for computation of the invariant features of the objects and the optimization procedure for determining its coordinates are suggested. The algorithm involves the Hough-transforms (HT), threshold processing in the HP parameter plane, logarithmic transform of the coordinates, and direct calculation of the invariants with respect to the above groups of the affine transforms. The block-diagram of the iconic system is presented. The algorithm application to aircraft images processing is provided.

关键词： Retina Transform theory Object recognition Image segmentation Image processing detection and tracking algorithms Gallium Modulators Computing systems Polarization

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DETERMINISTICALLY BASED RADAR GLINT MODEL FOR REAL-TIME SIMULATIONS

DETERMINISTICALLY BASED RADAR GLINT MODEL FOR REAL-TIME SIMU...

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1ST CONF ON SPACE GUIDANCE, CONTROL, AND tracking

作者： SLUMAN, RV Sverdrup Corp. (United States)

ISBN: (纸本)081941185X

A new radar glint model has been created to evaluate the terminal characteristics of the Advanced Medium Range Air-to-Air Missile (AMRAAM). This model was designed to use deterministically based glint parameters that develop accurate glint characteristics for real-time simulations. The model uses a deterministically derived data table to specify the first order glint statistics; it then generates random glint characteristics which are a function of target type, target orientation, and the target rotation rate. This combination allows the model to develop radar cross section and glint data to drive the real-time AMRAAM simulation program.

关键词： Radar Missiles Data modeling Statistical modeling Antennas Computer simulations Mathematical modeling detection and tracking algorithms Error analysis Systems modeling

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REAL-TIME MULTIRESOLUTIONAL TARGET tracking

REAL-TIME MULTIRESOLUTIONAL TARGET TRACKING

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5TH CONF ON SIGNAL AND DATA PROCESSING OF SMALL TARGETS

作者： HONG, L WERTHMANN, JR BIERMAN, GS WOOD, RA Wright State Univ. (United States) Air Force Wright Lab. (United States)

A real-time multiresolutional approach for target tracking is developed in this paper. The wavelet transform is utilized to provide the multiresolutional measurements and bridge information at different resolutional l... 详细信息

ISBN: (纸本)0819411906

关键词： Wavelet transforms Algorithm development detection and tracking algorithms Filtering (signal processing) Matrices Electronic filtering Wavelets Data acquisition Signal processing Switching

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