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检索条件"主题词=Algorithm development"

共 1737 条记录，以下是1331-1340 订阅

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SYSTEMATIC CONSTRUCTION OF ORDER-RECURSIVE LS ESTIMATION algorithmS WITH ELEMENTARY ORTHOGONAL TRANSFORMATIONS 4

SYSTEMATIC CONSTRUCTION OF ORDER-RECURSIVE LS ESTIMATION ALG...

引用

4TH CONF ON ADVANCED SIGNAL PROCESSING algorithmS, ARCHITECTURES, AND IMPLEMENTATIONS

作者： LING, F Motorola (United States)

ISBN: (纸本)0819412767

This paper demonstrates that order-recursive least squares (ORLS) algorithms based on orthogonal transformations and hyperbolic transformations can be systematically constructed in two steps. The first step is to determine the structure of the ORLS algorithm according to the property of the data vector in the LS estimation and the requirements to the output. The second step is to determine the proper implementation of building blocks of the ORLS structure using orthogonal or hyperbolic transformations. The canonical ORLS structure and some possible orthogonal/hyperbolic implementations of their building blocks are presented. It is also shown that some of the orthogonal transformations are only applicable to certain types of ORLS structures and not to others.

关键词： algorithm development Error analysis Detection and tracking algorithms Digital signal processing Expectation maximization algorithms Statistical analysis Factor analysis Magnesium Roads Telecommunications

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ELIMINATION THEORY FOR SYSTEMS OF LINEAR INEQUALITIES APPLIED TO PROBLEMS IN DIGITAL GEOMETRY

ELIMINATION THEORY FOR SYSTEMS OF LINEAR INEQUALITIES APPLIE...

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CONF ON VISION GEOMETRY

作者： VEELAERT, P Univ. of Ghent (Belgium)

ISBN: (纸本)0819410330

In digital geometry we study the properties of discrete representations of geometrical sets; in general, a discrete representation consists of a set of digital points on a rectangular grid. In this paper we consider discrete representations that can be specified by linear inequalities. For example, a digital straight line, and more generally, a digital hyperplane can be specified by an expression that involves two inequalities. First, we describe an elimination method to solve systems of inequalities; it is based on a theorem on convex sets due to Helly. Next, we discuss how this method can be used to derive properties of digital sets. Finally, we illustrate this approach for digital curves. In particular, we show how the chord property for digital straight lines can be extended to digital curves of arbitrary order.

关键词： Vision geometry Image segmentation Silicon algorithm development Digital electronics algorithms Detection and tracking algorithms Chemical elements Electronics Quantization

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MODIFIED GIVENS ROTATIONS FOR INVERSE UPDATING IN QR DECOMPOSITION 4

MODIFIED GIVENS ROTATIONS FOR INVERSE UPDATING IN QR DECOMPO...

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4TH CONF ON ADVANCED SIGNAL PROCESSING algorithmS, ARCHITECTURES, AND IMPLEMENTATIONS

作者： SHEPHERD, TJ MCWHIRTER, JG Defence Research Agency (United Kingdom)

The sequence of Givens rotations used to update the upper triangular matrix R in a recursive QR decomposition may also be used to update the inverse transpose matrix R-H. Alternative forms of square-root-free Givens r... 详细信息

ISBN: (纸本)0819412767

The sequence of Givens rotations used to update the upper triangular matrix R in a recursive QR decomposition may also be used to update the inverse transpose matrix R^-H. Alternative forms of square-root-free Givens rotation for updating the inverse transpose matrix are derived by representing and storing it in a different factorized form from that used before. The modified Givens rotations do not involve explicit division by the exponential forget factor and lead to an update algorithm equivalent to the one derived by Sakai using Recursive Modified Gram Schmidt orthogonalization.

关键词： algorithm development Evolutionary algorithms Array processing Aluminum Chlorine Numerical simulations Signal processing Defense and security Digital filtering Roads

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STREAK SPLICING USING MEDIAL AXIS TRANSFORM TECHNIQUES

STREAK SPLICING USING MEDIAL AXIS TRANSFORM TECHNIQUES

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Meeting on Visual Communications and Image Communication 93

作者： FALABELLA, DJ ALBRIGHT COLL DEPT COMP SCIREADINGPA 19612

ISBN: (纸本)0819413690

One of the objectives of image processing is to detect and locate some meaningful discontinuities in the gray levels of an image. The usual approach taken is referred to as edge detection. Streak detection presents a related but sometimes different problem. Here we are concerned not only with the edges but also with the properties and features of that portion of the image which is contained within the boundaries of these edges. This paper looks at particular methods which may be applied for the location and characterization of such streaks and for the possible splicing together of different streak segments. Particular emphasis is placed on the development of an invariant proprerty referred to as the Preservation of Perimeter Property of an object (PPP). Coupled with this is the use of the Medial Axis Transformation (MAT) as a tool in the process. The MAT produces what is known as the skeleton of the object. Integrating a new approach to finding the Euclidean Elevation Map (EEM) with the MAT is a key in the development phases. The approach taken represents a compromise between the process of producing an exact bitmap of the skeleton and developing a faster approximation of the skeleton which incorporates usable, structural information.

关键词： Image segmentation Image processing Arteries Data storage Detection and tracking algorithms Photography algorithm development Edge detection Reconstruction algorithms Raster graphics

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HIGH-ORDER CURVE RECOGNITION WITH THE HOUGH TRANSFORM USING A CONNECTIONIST APPROACH 2

HIGH-ORDER CURVE RECOGNITION WITH THE HOUGH TRANSFORM USING ...

引用

CONF ON SCIENCE OF ARTIFICIAL NEURAL NETWORKS 2

作者： ARRUE, BC INIGO, RM Univ. of Virginia (Spain) Univ. of Virginia (United States)

ISBN: (纸本)0819412023

Extraction of lines and curves from images is one of the most important and fundamental tasks in machine inspection and computer vision in general. Among all the techniques in detecting lines and curves, the Hough Transform (HT) method is unique in its ability to cope effectively with noise, gaps in outlines and even partial occlusion. In spite of this ability, the HT method is still not widely used in real time applications due to its computationally intensive requirements. One solution to this problem is to find an architecture for parallel processing. Recently, some approaches using parallel architectures have been reported. In real-time applications, the overall time required using these approaches is of the order of hundreds of milliseconds for a typical image of 256 X 256 resolution. Clearly, this speed is not good enough for most image processing and machine vision tasks where line detection is just partial work. Since these architectures use commercial components and are not highly parallel, there is ample opportunity to improve the speed by using neural-like analog circuitry. An original method of higher order curve (HOC) detection using the Hough Transform is presented. This method is computationally very efficient and may yield to hardware implementation, thus making it possible to use the Hough Transform in fast real time applications.

关键词： Hough transforms Artificial neural networks Content addressable memory Quantization algorithm development Image resolution Image segmentation Machine vision Neural networks Pattern recognition

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PROCESSING OF COMPLEX INTERFEROGRAMS ON PERSONAL COMPUTERS

PROCESSING OF COMPLEX INTERFEROGRAMS ON PERSONAL COMPUTERS

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3RD INTERNATIONAL WORKSHOP ON IODINE LASERS AND APPLICATIONS

作者： KALAL, M Czech Technical University in Prague Faculty of Nuclear Sciences and Physical Engineering Department of Physical Electronics V Holešovičkách 2 Prague 8 180 00 Czech Republic

An interferometric technique - complex interferometry - which enables recording of up to three sets of data into just one so-called `complex' interferogram is reviewed and its potential and limits are described. P... 详细信息

ISBN: (纸本)0819412260

关键词： Computing systems Interferometry Laser beam diagnostics Phase shifts iodine lasers Fourier transforms Spatial frequencies algorithm development Heterodyning Reconstruction algorithms

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PRECISION HIGH-TEMPERATURE BLACKBODIES 4

PRECISION HIGH-TEMPERATURE BLACKBODIES

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CONF ON ULTRAVIOLET TECHNOLOGY 4

作者： SAPRITSKY, VI JOHNSON, BC SAUNDERS, RD VLASOV, LV SUDAREV, KA KLEVNOY, BB SHAPOVAL, VI DMITRIEV, IA BUCHNEV, LM PROCHOROV, AV National Institute of Standards and Technology (United States) All-Union Research Institute for Optical and (Russia)

This paper reviews the research and design of high temperature blackbody sources for the temperature interval from 2000 K to 3000 K. Sources with large apertures are addressed specifically, as these are well suited to... 详细信息

ISBN: (纸本)0819409375

关键词： Black bodies Tungsten Temperature metrology Lamps Standards development Ultraviolet radiation algorithm development Radiometry Resistance Sensors

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ADAPTIVE DISCRETIZATION IN RANDOM PROCESS MEASUREMENT PROBLEMS

ADAPTIVE DISCRETIZATION IN RANDOM PROCESS MEASUREMENT PROBLE...

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2nd International Symposium on Measurement Technology and Intelligent Instruments

作者： HAJIYEV, CM AZERBAIJANIAN SCI & PROD GRP SUMGAIT 373204AZERBAIJAN

ISBN: (纸本)0819413844

Herein on the basis of the outlying theory the correspondence between discretisation intervals of a supervised value and some preset value of the criterion which defines the supervision certainty is determined. As a result the adaptive measurement discretisation algorithm has been developed obtaining (by the measure and statistics) the time interval after which the next supervision is to be performed.

关键词： Tolerancing algorithm development algorithms Probability theory Control systems Binary data Improvised explosive devices Ions Lithium Time metrology

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HIGH-SPEED A/D AND D/A INTERFACE FOR PCS WITH APPLICATIONS IN IMAGE-PROCESSING

HIGH-SPEED A/D AND D/A INTERFACE FOR PCS WITH APPLICATIONS I...

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Conference on Video Communications and PACS for Medical Applications

作者： VLAICU, A MECIU, E IACOB, S TECH UNIV CLUJ NAPOCA DEPT COMMUNR-3400 CLUJ NAPOCAROMANIA

ISBN: (纸本)0819412236

The paper is concerned with theoretical and practical problems related to real time acquisition and storage of standard PAL/SECAM images and also with developing fast software algorithms for digital image processing. A first section of the paper comprises the description of the block diagram of the PC plug-in conversion unit and a second one refers to practical image data compression and basic image processing algorithms.

关键词： Data conversion Image processing Video Data compression algorithm development Image compression Data storage Digital image processing Image storage Software development

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ROBUST APPROACH TO OCULAR FUNDUS IMAGE-ANALYSIS

ROBUST APPROACH TO OCULAR FUNDUS IMAGE-ANALYSIS

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CONF ON BIOMEDICAL IMAGE PROCESSING AND BIOMEDICAL VISUALIZATION

作者： TASCINI, G PASSERINI, G PULITI, P ZINGARETTI, P Univ. di Ancona (Italy) INRCA (Italy) Univ. di Ancona and INRCA (Italy)

ISBN: (纸本)0819411388

The analysis of morphological and structural modifications of retinal blood vessels plays an important role both to establish the presence of some systemic diseases as hypertension and diabetes and to study their course. The paper describes a robust set of techniques developed to quantitatively evaluate morphometric aspects of the ocular fundus vascular and micro vascular network. They are defined: (1) the concept of 'Local Direction of a vessel' (LD); (2) a special form of edge detection, named Signed Edge Detection (SED), which uses LD to choose the convolution kernel in the edge detection process and is able to distinguish between the left or the right vessel edge; (3) an iterative tracking (IT) method. The developed techniques use intensively both LD and SED in: (a) the automatic detection of number, position and size of blood vessels departing from the optical papilla; (b) the tracking of body and edges of the vessels; (c) the recognition of vessel branches and crossings; (d) the extraction of a set of features as blood vessel length and average diameter, arteries and arterioles tortuosity, crossing position and angle between two vessels. The algorithms, implemented in C language, have an execution time depending on the complexity of the currently processed vascular network.

关键词： Surface conduction electron emitter displays Detection and tracking algorithms Edge detection Blood vessels Image segmentation Image analysis Convolution algorithm development Information technology Automatic tracking

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