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2009 12th International Conference on Information Fusion, FUSION 2009

作者： Clark, Daniel E. Ba, Tuong Vo Ba, Ngu Vo Joint Research Institute in Signal and Image Processing School of Engineering and Physical Sciences Heriot-Watt University United Kingdom School of Electrical Electronic and Computer Engineering University of Western Australia 35 Stirling Hwy Crawley WA 6009 Australia Department of Electrical and Electronic Engineering University of Melbourne Parkville VIC 3052 Australia

ISBN: (纸本)9780982443804

The problem of jointly detecting whether a target is present in a scene and, if there is, estimating its state can be viewed as a multi-object estimation problem where there is a maximum of one target. This joint detection and estimation problem can be solved using a special case of the multi-object Bayes filter. In this paper we investigate the joint target detection and estimation problem with forward-backward smoothing and propose a sequential Monte Carlo implementation. Finite Set Statistics not only facilitates the development of appropriate joint detection and estimation filters, but also the direct extension of these filtering solutions to their related smoothing counterparts. Preliminary results indicate that using the smoothing has two distinct advantages over just using filtering: Firstly, we are able to more accurately identify the appearance and disappearance of a target in the scene and secondly, we can provide improved state estimates when the target exists. ©2009 ISIF.

关键词： Monte Carlo methods

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New simulation models for non-isotropic scattering mobile-to-Mobile rayleigh fading channels 09

New simulation models for non-isotropic scattering mobile-to...

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2009 ACM International Wireless Communications and Mobile Computing Conference, IWCMC 2009

作者： Cheng, Xiang Laurenson, David I. Salous, Sana Vasilakos, Athanasios V. Joint Research Institute for Signal and Image Processing School of EPS Heriot-Watt University Edinburgh EH14 4AS United Kingdom Center for Communication Systems University of Durham Durham DH1 3LE United Kingdom Department of Computer and Telecommunications Engineering University of Western Macedonia Kozani GR 50100 Greece

ISBN: (纸本)9781605585697

To simulate mobile-to-mobile (M2M) Rayleigh fading channels under more realistic scenario of non-isotropic scattering, we propose one deterministic and one stochastic sumof- sinusoids (SoS) based simulation models. The proposed models extensively consider the distributions of the angle of arrival (AoA) and the angle of departure (AoD), and thus show a good approximation to the desired statistical properties of the reference model. Copyright 2009 ACM.

关键词： Rayleigh fading

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Detection of Rock Fractures Junction in Gray-Level images

Detection of Rock Fractures Junction in Gray-Level Images

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Congress on image and Signal processing, CISP

作者： Minghao Liu W. B. Jin W. X. Wang Sino-Korea Chongqing GIS Research Center College of Computer Science Chongqing University of Posts and Telecommunications Chongqing China Institute of Image Processing College of Computer Science Chongqing University of Posts and Telecommunications Chongqing China

Rock fractures junctions are important objects for detection of rock fracture. Traditionally, junction detectors are devoted to the step-edge corners. Such corners are usually located using a Laplascian operator (zero-crossings or extrema) or a curvature measure based on the gradient direction. However, the gradient direction of a line does not exist, and a line junction does not correspond to a zero-crossing of the Laplacian. Consequently, step-edge corner detectors are not suitable for line junctions. Their response to a single line junction is not unique. There are other methods to detect the junction. Most of them find L-shaped corners, but create multiple or no responses for more complex junctions. This paper proposes a robust detection method for gray-level line junction which is called the neighborhood pixel-track algorithm. Examples are provided based on experiments with synthetic and real images. The achieved results demonstrate that such junction detection algorithm can successfully identify T-and Y-junctions, and of degree four X-junctions or more complex intercross of rock fractures.

关键词： Detectors Educational institutions computer science Atmospheric measurements Geologic measurements Pollution measurement Detection algorithms Radioactive pollution Earth image edge detection

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A layered approach to robust lane detection at night

A layered approach to robust lane detection at night

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IEEE Workshop on Computational Intelligence in Vehicles and Vehicular Systems, CIVVS

作者： Amol Borkar Monson Hayes Mark T. Smith Sharathchandra Pankanti Center of Signal and Image Processing (CSIP) Georgia Institute of Technology USA Department of Communication Systems KTH Swedish Royal Institute of Technology Sweden Exploratory Computer Vision Group (ECVG) IBM Thomas J. Watson Research Center USA

A layered approach is designed to address many of the real-world problems that an inexpensive lane detection system would encounter. A region of interest is first extracted from the image followed by an enhancement procedure to manipulate the shape of the lane markers. The extracted region is then converted to binary using an adaptive threshold. A model based line detection system hypothesizes lane position. Finally, an iterated matched filtering scheme estimates the final lane position. The developed system shows good performance when tested on real-world data that contains fluctuating illumination and a variety of traffic conditions.

关键词： Robustness image edge detection Cameras image converters Lighting Road accidents Automobiles Pixel Road transportation image segmentation

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Free-Form Deformation with Rational DMS-Spline Volumes

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Journal of computer Science & Technology 2008年第5期23卷 862-873页

作者：徐岗汪国昭陈小雕 Institute of Computer Graphics and Image Processing Zhejiang University Department of Mathematics Zhejiang University College of Computer Science Hangzhou Dianzi University INRIA Nancy France

In this paper, we propose a novel free-form deformation （FFD） technique, RDMS-FFD （Rational DMS-FFD）, based on rational DMS-spline volumes. RDMS-FFD inherits some good properties of rational DMS-spline volumes and combines more deformation techniques than previous FFD methods in a consistent framework, such as local deformation, control lattice of arbitrary topology, smooth deformation, multiresolution deformation and direct manipulation of deformation. We first introduce the rational DMS-spline volume by directly generalizing the previous results related to DMS-splines. How to generate a tetrahedral domain that approximates the shape of the object to be deformed is also introduced in this paper. Unlike the traditional FFD techniques, we manipulate the vertices of the tetrahedral domain to achieve deformation results. Our system demonstrates that RDMS-FFD is powerful and intuitive in geometric modeling.

关键词： free-form deformation rational DMS-spline volume control lattice of arbitrary topology multiresolution deformation direct manipulation

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Approximate merging of multiple Bézier segments

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Progress in Natural Science:Materials International 2008年第6期18卷 757-762页

作者： Min Chenga,b,Guojin Wanga,* ainstitute of computer graphics and image processing,Zhejiang University,Hangzhou 310027,China bCollege of Science,Zhejiang University of Technology,Hangzhou 310032,China Institute of Computer Graphics and Image Processing Zhejiang University Hangzhou 310027 China College of Science Zhejiang University of Technology Hangzhou 310032 China

This paper deals with the approximate merging problem of multiple adjacent Bézier curves with dierent degrees by a single Bézier curve,which is a frequently seen problem in *** unified matrix representation for precise merging is presented and the approx-imate merging curve is further derived based on matrix *** at the endpoints of curves is also discussed in the merging *** show that the method in this paper achieves satisfying merging results.

关键词： computer-aided geometric design Bézier curve Approximate merging Matrix representation

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Forward-backward sequential Monte Carlo smoothing for joint target detection and tracking

Forward-backward sequential Monte Carlo smoothing for joint ...

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International Conference on Information Fusion

作者： Daniel E. Clark Ba Tuong Vo Ba Ngu Vo Joint Research Institute in Signal & Image Processing School of Engineering & Physical Sciences Heriot-Watt University UK School of Electrical Electronic & Computer Engineering University of Western Australia Crawley WA Australia Department of Electrical & Electronic Engineering University of Melbourne Parkville VIC Australia

ISBN: (纸本)9780982443804

关键词： Monte Carlo methods Smoothing methods Object detection Target tracking Nonlinear filters Filtering State estimation Layout Current measurement Delay estimation

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Computational fluid flow simulation on body fitted mesh geometry with IBM cell broadband engine architecture

Computational fluid flow simulation on body fitted mesh geom...

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European Conference on Circuit Theory and Design, ECCTD

作者： Zoltan Nagy Andras Kiss Sandor Kocsardi Arpad Csik Computer and Automation Research Institute Hungarian Academy of Sciences Changzhou China Department Information Technology Pázmány Péter Catholic University Changzhou China Department Image Processing and Neurocomputing University of Pannonia Veszprem Hungary Department of Mathematics and Computational Sciences Széchenyi István University Gyor Hungary

The solutions of partial differential equations (PDEs) play a key role in today's real world simulations. Computational Fluid Dynamics (CFD) is an important part of this area, which involves the problem of gas or fluid flow over different obstacles, e.g., air flow around vehicles, buildings, or the flow of water in the oceans. In engineering applications the temporal evolution of non-ideal, compressible fluids is quite often modeled by the system of Navier-Stokes equations. They are a coupled set of nonlinear hyperbolic partial differential equations and form a relatively simple, yet efficient model of compressible fluid dynamics. In the paper the implementation of a CFD on Body Fitted Mesh geometry on the Cell Broadband Engine is described. An arbitrary surface can be more easily simulated on body fitted mesh than on rectangular computation domain.

关键词： Fluid flow Computational modeling Solid modeling Computational geometry Engines computer architecture Computational fluid dynamics Partial differential equations Marine vehicles Buildings

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Extended Cubic Uniform B-spline and α-B-spline

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自动化学报 2008年第8期34卷 980-983页

作者： XU Gang WANG Guo-Zhao Institute of Computer Graphics and Image Processing Department of Mathematics Zhejiang University Hangzhou 310027 P. R. China

花键曲线和表面在 CAD 和计算机图形起一个重要作用。在这份报纸，我们建议立方的一致 B 花键的几延期。然后，我们在场插入内推的延期 -B-spline 基于新 B 花键和单个相配技术。延期的优点是他们有全球、本地的形状参数。而且，我们也... 详细信息

花键曲线和表面在 CAD 和计算机图形起一个重要作用。在这份报纸，我们建议立方的一致 B 花键的几延期。然后，我们在场插入内推的延期 -B-spline 基于新 B 花键和单个相配技术。延期的优点是他们有全球、本地的形状参数。而且，我们也在数据插值和多角形的形状变丑调查他们的应用。

关键词：计算机技术 CAD 图象处理技术几何图形

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Irregular Cellular Spaces: Supporting realistic spatial dynamic modeling over geographical databases

Irregular Cellular Spaces: Supporting realistic spatial dyna...

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10th Brazilian Symposium on GeoInformatics, GEOINFO 2008

作者： Carneiro, Tiago G.S. Câmara, Gilberto Maretto, Raian V. Computer Science Department Federal University Ouro Preto MG Brazil Image Processing Division National Institute for Space Research SP Brazil

This paper presents a new computational model for representing the Geographic Space concept, called Irregular Cellular Space, which main goal is supporting the development of multiscale spatially explicit dynamic models integrated to geographical databases. This model has been implemented in a modeling software platform named TerraME which has been used for the development of some interesting environmental dynamic models and form simulation of dynamic spatial patterns of change.

关键词： Dynamic models

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