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

作者： QIAN, K ZHU, W BHATTACHARYA, P Georgia Southwestern College (United States) Univ. of Nebraska/Lincoln (United States)

A new algorithm which can skeletonize both black-white and gray pictures is presented. This algorithm is based on distance transformation and can preserve the topology of the original picture. It can be extended to 3-... 详细信息

ISBN: (纸本)0819411930

关键词： Image processing Parallel processing algorithm development Computer science Binary data Lithium

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JOINT MULTIGRID ESTIMATION OF 2D MOTION AND OBJECT BOUNDARIES USING BOUNDARY PATTERNS

JOINT MULTIGRID ESTIMATION OF 2D MOTION AND OBJECT BOUNDARIE...

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Meeting on Visual Communications and Image Communication 93

作者： BUSCHMANN, R UNIV HANNOVER INST THEORET NACHRICHTENTECH & INFORMATIONSVERARBEITUNGD-30167 HANNOVERGERMANY

ISBN: (纸本)0819413690

For the improvement of joint estimation of 2D motion and 2D object boundaries an optimization procedure based on multigrid and pattern processing is presented. In this procedure an iterative optimization is applied using grids of different resolution, starting with a global estimation of the motion in the coarsest grid. Improvements are achieved by the introduction of boundary patterns, which are obtained from boundary estimates from coarser grids to be used in the finer ones. It is shown that the developed technique compared to a hierarchical blockmatching technique leads to a significant reduction of the mean square error between compensated and original images at object boundaries.

关键词： Motion estimation Image processing Cameras Optimization (mathematics) 3D image processing algorithm development Binary data Stochastic processes algorithms Error analysis

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SEQUENTIAL AND PARALLEL BLOCK-STRUCTURED SHORTEST-PATH RAY-TRACING algorithmS

SEQUENTIAL AND PARALLEL BLOCK-STRUCTURED SHORTEST-PATH RAY-T...

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Conference on Mathematical Methods in Geophysical Imaging

作者： JOHNSON, OG YANG, TW UNIV HOUSTON DEPT COMP SCIRES COMPUTAT LABHOUSTONTX 77204

ISBN: (纸本)0819412821

Shortest path network algorithms have been applied to geophysical raytracing by Nakanishi and Yamaguchi and Moser. In the present work two new algorithms are introduced which further exploit the special structure of network models as applied to geological structures. The algorithm differs in the scanning order of network blocks in a processing queue. An early version of this concept, with computed examples was given. Mathematical correctness of both algorithms, `block-greedy' and `block-breadth', is established. It is then shown that block- greedy limits the updating cycles per block but is inherently sequential whereas block-breadth may incur back-tracking but allows parallel execution. Shared memory architectures allow block level parallelization with guided self-scheduling on a global queue. Message-passing architectures allow direct parallel counterparts to sequential breadth-first execution.

关键词： Ray tracing Lithium 3D modeling Acoustics algorithm development algorithms Data processing Mathematical modeling Process control Computer science

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First analysis of Brewer Umkehr data from a high-latitude observatory

First analysis of Brewer Umkehr data from a high-latitude ob...

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Atmospheric Ozone

作者： Rummukainen, Markku Kyro, Esko Finnish Meteorological Institute (Finland)

ISBN: (纸本)0819413062

Even though observational data on atmospheric ozone has been steadily increasing during the last few decades, ozone in the upper stratosphere is still poorly resolved. A feasible method for retrieving this information is ground-based spectrophotometer observation of the Umkehr effect. At Sodankyla Observatory in northern Finland, Umkehr-observations have been performed for some years now. Here we present the first results from this work and show some of the potential of the technique.

关键词： Ozone Observatories Spectrophotometry Stratosphere algorithm development Climatology Data modeling Meteorology Chemistry Environmental sensing

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Computer vision system for the automatic measurement of volumes of wood

Computer vision system for the automatic measurement of volu...

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Computer Vision for Industry

作者： Correia, Bento B. Davies, Roger Carvalho, Fernando D. Rodrigues, F.C. INETI-OPTICA (Portugal)

ISBN: (纸本)0819412384

In this paper we describe the computer vision system TOROS developed at INETI to automate the volumetric evaluation procedure as the loads of logs enter the paper mill. The method consists of on- line analysis of the images of all the visible sides of the load of wood, assuming that the logs are always stacked the same way, namely across the width of the truck. The lateral images captured by the system contain information about the sectional area of the logs, and the rear image provides the data related to their length. Once a calibration procedure has been applied, the measurements of the gross volume presented to the vision system are evaluated, based on the automatic detection of the contours of regions of wood in all the images considered. The most important feature of this computer vision system is the possibility to provide a measure of the percentage of wood that is really present in the consignment, through the identification of all the spaces between the ends of logs in the lateral images.

关键词： Computing systems Computer vision technology Image segmentation Machine vision Image processing Cameras algorithm development Solids Calibration Imaging systems

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BIO-SPEAD - A PARALLEL COMPUTING ENVIRONMENT TO ACCELERATE development OF BIOLOGIC SIGNAL-PROCESSING algorithmS

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COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 1992年第2期37卷 137-147页

作者： OPPENHEIM, MI FACTOR, M SITTIG, DF YALE UNIV SCH MEDYALE CTR MED INFORMATNEW HAVENCT 06510

We have created BIO-SPEAD (pronounced speed), a BIOlogical Signal Processing Environment for algorithm development. BIO-SPEAD is designed to accelerate development of complex algorithms which integrate information derived from single or multiple physiologic waveforms. BIO-SPEAD currently performs all of the basic analyses of several arterial blood pressure waveforms, and allows the user to utilize the results of those low-level analyses for development of more complex algorithms. We utilized a parallel programming architecture called the Process Trellis which keeps the different tasks, or processes, within BIO-SPEAD independent of each other. Additionally, we have developed a graphics interface to enable the user to visualize the waveform under analysis, the low-level system analysis, and the internal workings of the algorithm under development. The system has been used for several algorithm development projects and has demonstrated its utility.

关键词： SIGNAL PROCESSING algorithm development PARALLEL COMPUTERS BLOOD PRESSURE CARDIOVASCULAR MONITORING

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DIGITAL IMAGE-PROCESSING OF HOLOGRAPHIC SOUNDFIELD IMAGES 4

DIGITAL IMAGE-PROCESSING OF HOLOGRAPHIC SOUNDFIELD IMAGES

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CONF ON LASER INTEROMETRY 4 : COMPUTER-AIDED INTERFEROMETRY

作者： CROSTACK, HA MEYER, EH POHL, KJ Qualitaetszentrum Dortmund GmbH & Co. KG (Germany) Univ. Dortmund (Germany)

ISBN: (纸本)0819406813

The operaUon of machines and plants often leads to a strong loading of near-surface regions. Consequently, the non-destructive testing (NDT) of these regions during production as well as inspection is of high interest. Besides flaw detection the used test method should allow an exact flaw description. Furthermore contactiess techniques and the possibility of automation are points of interest. One technique which fulfils most of these requirements is the holographic soundfield visualization /1/. This technique allows large area detection of ultrasound (US) surface waves by means of opto-holographic methods. The test result is given by an image of the object surface covered with interference fringes representing the soundwave fronts. Until now only visual evaluation of the recorded soundfield images is performed. Because of the superposition of flaw pattern with the pattern of the insonicated soundwave, an exact flaw analysis appears difficult. with respect to precise as well as automatic testing digital image processing can be applied. The main task of image processing of soundfield images should be the isolation of flaw information from the background which is given by the insonicated wave and the image of the object surface.

关键词： Holography Image processing Digital image processing Image filtering Visualization Detection and tracking algorithms Holograms algorithm development Optical filters Ultrasonics

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SEMIDIFFERENTIAL INVARIANTS - ALGEBRAIC-DIFFERENTIAL HYBRIDS

SEMIDIFFERENTIAL INVARIANTS - ALGEBRAIC-DIFFERENTIAL HYBRIDS

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3RD CONF ON HYBRID IMAGE AND SIGNAL PROCESSING

作者： KEMPENAERS, P VANGOOL, LJ OOSTERLINCK, A Catholic Univ. of Leuven (Belgium)

ISBN: (纸本)0819408670

In the realm of flexible automation, viewpoint independent object recognition will become increasingly important. An algorithm for the recognition of plane shapes under pseudo- perspective projection is presented. The method is based on the comparison of features that remain invariant under 2-D affine transformations. In particular, the work presented is part of the wider framework of semi-differential invariants. It was successfully tested on a database containing 42 objects.

关键词： Databases Image processing Affine motion model Signal processing Data modeling Image segmentation Object recognition Detection and tracking algorithms Edge detection algorithm development

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BASIC MEASUREMENTS FOR THE DETERMINATION OF CONCENTRATIONS OF TRACE GASES FROM EMISSION-SPECTRA 8

BASIC MEASUREMENTS FOR THE DETERMINATION OF CONCENTRATIONS O...

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8TH INTERNATIONAL CONF ON FOURIER TRANSFORM SPECTROSCOPY

作者： LINDERMEIR, E DLR-Oberpfoffenhofen and Technische Univ. Muenchen (Germany)

ISBN: (纸本)0819407062

With a Fourier-transform spectrometer, emission spectra of mixtures of gases are measured in the laboratory. These laboratory measurements are performed to simulate measurements of exhaust gases at smoke stacks. The aim of the work is the development of measurement methods and evaluation algorithms to determine the concentrations of the constituents of exhaust gases from remotely measured spectra of the infrared radiation of the plume.

关键词： Gases Spectroscopy Black bodies Temperature metrology algorithm development Infrared radiation Body temperature Calibration Computer simulations Spectral calibration

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ASSESSING THE PERFORMANCE OF MULTISENSOR FUSION SYSTEMS

ASSESSING THE PERFORMANCE OF MULTISENSOR FUSION SYSTEMS

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SENSOR FUSION CONF : CONTROL PARADIGMS AND DATA STRUCTURES

作者： LLINAS, J Calspan Corp. (United States)

ISBN: (纸本)0819407488

In recent years, numerous prototypical systems have been developed for multisensor data fusion. A typical data fusion process operates on sensor parametric data (e.g., data related to target position or attribute data) in order to develop an order of battle, provide an evaluation of tactical situations, or assess tactical threats. This model, developed by the Data Fusion Sub- panel (DFS) of the Joint Directors of Laboratories, partitions fusion processing into four conceptual levels. Ancillary functions in a fusion system include the human computer interface, data base management, source-preprocessing functions, and communications. Military applications for data fusion span a broad range including fusion of data on board a single platform for identifying other platforms (e.g., identification--friend or foe--neutral systems), threat warning systems, situation assessment, and threat assessment systems. Large scale systems such as the All-Source Analysis System (ASAS) or the Joint Surveillance, Targeting, and Reconnaissance System (JSTARS) provide for direction, coordination, and fusion of both ground-based and airborne sensors to aid in the effective management of a ground based battlefield environment. Such systems have become ever more sophisticated. Indeed, many of the prototypical systems utilize advanced identification techniques such as knowledge-based or expert systems. Dempster-Shafer interface techniques, adaptive neural networks, and sophisticated tracking algorithms. While much research is being performed to develop and apply new algorithms and techniques, little work has been performed to determine how well such methods work or to compare alternative methods against a common problem. The issues of system performance and system effectiveness are keys to establishing how well an algorithm, technique, or collection of techniques perform, and then the extent to which these techniques may be used to achieve success on an operational mission.

关键词： Data fusion Sensors Data modeling Telecommunications Sensor fusion Detection and tracking algorithms Target detection Data acquisition Computing systems algorithm development

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