Computational Science and Its Applications - ICCSA 2006
International Conference, Glasgow, UK, May 8-11, 2006. Proceedings, Part I

Marina Gavrilova, Osvaldo Gervasi, Vipin Kumar, C. J. Kenneth Tan, David Taniar, Antonio Laganá, Youngsong Mun, Hyunseung Choo

Items from 1 to 20 out of 142 results

chapter

The Study on Three Stages in Retinal Mechanism

Sung-Kwan Je, Kwang-Baek Kim, Jae-Hyun Cho, Eui-Young Cha

Lecture Notes in Computer Science > Computational Science and Its Applications - ICCSA 2006 > General Tracks > 1110-1117

Recently many researches have been studied in the human vision model to solve the problem of the machine vision. In retina, input data was processed information processing that was data reduction, edge detection, and emphasizing region. The processed image was recognized by brain. Starting from research on the human visual system, we proposed algorithms that process data reduction and edge detection...

chapter

Curvature Monotony Condition for Rational Quadratic B-spline Curves

Zhong Li, Lizhuang Ma, Dereck Meek, Wuzheng Tan, more

Lecture Notes in Computer Science > Computational Science and Its Applications - ICCSA 2006 > General Tracks > 1118-1126

The monotone curvature condition for rational quadratic B-spline curves is studied in this paper. At first, we present the necessary and sufficient conditions of monotone curvature for the uniform rational quadratic B-spline segment and we compare it to the curvature condition of rational quadratic Bezier curve. Then, we give the sufficient condition of monotone curvature for the nonuniform rational...

chapter

Estimation of Input Ranking Using Input Sensitivity Approach

Sanggil Kang, Steve Morphet

Lecture Notes in Computer Science > Computational Science and Its Applications - ICCSA 2006 > General Tracks > 1127-1133

In feed-forward neural networks, all inputs contribute to a greater or lesser extent when calculating the outputs. Therefore, inputs may be ordered from the greatest contributor to the least. Input ranking is non-trivial – cursory examination of the weight and bias matrices fails to reveal ranking. Solving the ranking issue allows the elimination of inputs with little influence on output. This paper...

chapter

A Collaborative Design Environment

Wuzheng Tan, Lizhuang Ma, Zhihong Mao, Zhong Li

Lecture Notes in Computer Science > Computational Science and Its Applications - ICCSA 2006 > General Tracks > 1134-1145

This paper presents a collaborative virtual design environment based on the globally shared product model conforming to STEP Standard. The platform provides an integration environment and changes paradigms between I_DEAS, Smarteam (PDM software) and Conceptual Innovation Design System (CIDS). The platform is illustrated for sugarcane harvester design analysis as an example, and provides a collaborative...

chapter

Towards a High Integrity XML Link Update in Object-Relational Database

Eric Pardede, J. Wenny Rahayu, David Taniar

Lecture Notes in Computer Science > Computational Science and Its Applications - ICCSA 2006 > General Tracks > 1146-1155

With the increasing usage of XML database, XML update has become an important issue in the database community. How updates affect the XML documents need to be investigated further. In this paper we propose a methodology to maintain the integrity of updated XML documents by maintaining the consistency of XML Link. XLink and its subsequent XPointer are W3C standards and used to provide referential purpose...

chapter

Various Types of Attacks and Solutions Regarding Secure Remote User Access over Insecure Networks

Eun-Jun Yoon, Kee-Young Yoo

Lecture Notes in Computer Science > Computational Science and Its Applications - ICCSA 2006 > General Tracks > 1156-1165

In 2005, Peyravian-Jeffries proposed secure password-based protocols for remote user authentication, password change, and session key establishment over insecure networks. These protocols, however, are still susceptible to a stolen-verifier attack. Accordingly, the current paper demonstrates the vulnerability of their protocols to a stolen-verifier attack and then, a simple solution to resolve such...

chapter

Revealing Statistical Independence of Two Experimental Data Sets: An Improvement on Spearman’s Algorithm

Bogdan Badea, Adriana Vlad

Lecture Notes in Computer Science > Computational Science and Its Applications - ICCSA 2006 > General Tracks > 1166-1176

A high effective statistical independence test procedure derived from Spearman’s Rank Correlation Test is presented, applicable to all kind of continuous variables (normal or not, even of unknown probability law). Some relevant practical signal processing test examples as well as a Monte Carlo performance comparison with Spearman’s Rank Correlation Test capabilities are explained. Besides describing...

chapter

Parallelizable Computational Technique for Singularly Perturbed Boundary Value Problems Using Spline

Rajesh Kumar Bawa

Lecture Notes in Computer Science > Computational Science and Its Applications - ICCSA 2006 > General Tracks > 1177-1182

In this paper, we considered singularly perturbed self–adjoint boundary-value problems and proposed a computational technique based on spline scheme, which is also suitable for parallel computing. The whole domain is divided into three non-overlapping subdomains and corresponding subproblems are obtained by using zeroth order approximations of the solution at boundaries of these subproblems. The subproblems...

chapter

Practical Boolean Operations on Point-Sampled Models

Xujia Qin, Weihong Wang, Qu Li

Lecture Notes in Computer Science > Computational Science and Its Applications - ICCSA 2006 > Technical Session on Computer Graphics (TSCG 2006) > 393-401

Boolean operation is an important way in geometry modeling. This paper proposes a novel Boolean operations algorithm for point-sampled models based on implicit function transforming. In the algorithm, the point models are converted to implicit surfaces at first, and then Boolean operations for implicit surface are used to the point models. The simple forms of Boolean operations for implicit surfaces...

chapter

Dynamic Brush Stroke Generation for an Impressionist Effect

Youngsup Park, Kyunghyun Yoon

Lecture Notes in Computer Science > Computational Science and Its Applications - ICCSA 2006 > Technical Session on Computer Graphics (TSCG 2006) > 402-409

We propose dynamic brush stroke generation for an impressionist effect of source images, using reference data. Colors used are formed by actual palette colors from artists. To create the palette, we have referred mostly to colors used in Van Gogh’s works and determined the color of brush strokes by transferring it to the most similar one, through comparing colors used in source images and the palette...

chapter

Image-Based 3D Face Modeling from Stereo Images

Kyongpil Min, Junchul Chun

Lecture Notes in Computer Science > Computational Science and Its Applications - ICCSA 2006 > Technical Session on Computer Graphics (TSCG 2006) > 410-419

This paper presents an automatic and novel method to generate a realistic 3D face model from stereo images. Typically, an image-based 3D face modeling system is in need of human intervention in facial feature extraction stage. To remove this human intervention, we propose HT(Hue-Tint) skin color model for facial feature extraction. Based on the proposed chrominance model, we can detect facial region...

chapter

Perception-Guided Simplification for Real Time Navigation of Very Large-Scale Terrain Environments

Sheng Li, JunFeng Ji, XueHui Liu, GuoPing Wang, more

Lecture Notes in Computer Science > Computational Science and Its Applications - ICCSA 2006 > Technical Session on Computer Graphics (TSCG 2006) > 420-430

Interactive navigation over very large-scale terrain environments is a highly challenging topic since the model involved often contains huge amount of geometries and textures, even exceeds the capacity of system memory. In this paper, we put forward a high-performance technique for real-time walkthrough in very large-scale terrain environments. By the technique, perception-guided simplification is...

chapter

3D Building Reconstruction from LIDAR Data

Yuan Luo, Marina L. Gavrilova

Lecture Notes in Computer Science > Computational Science and Its Applications - ICCSA 2006 > Technical Session on Computer Graphics (TSCG 2006) > 431-439

As a fast data acquisition technique, Light Detection and Ranging (LIDAR) can be widely used in many applications, such as visualization, GIS and mobile communication. Since manual surface reconstruction is very costly and time consuming, the development of automated algorithms is of great importance. In this paper a fully automated technique to extract urban building models from LIDAR data is presented...

chapter

Efficient Computation of Elliptic Gabriel Graph

Changhee Lee, Donguk Kim, Hayong Shin, Deok-Soo Kim

Lecture Notes in Computer Science > Computational Science and Its Applications - ICCSA 2006 > Technical Session on Computer Graphics (TSCG 2006) > 440-448

Searching neighboring points around a point in a point set has been important for various applications and there have been extensive studies such as the minimum spanning tree, relative neighborhood graph, Delaunay triangulation, Gabriel graph, and so on. Observing the fact that the previous approaches of neighbor search may possibly sample severely biased neighbors in a set of unevenly distributed...

chapter

Systematic Sampling in Image-Synthesis

Mateu Sbert, Jaume Rigau, Miquel Feixas, Laszlo Neumann

Lecture Notes in Computer Science > Computational Science and Its Applications - ICCSA 2006 > Technical Session on Computer Graphics (TSCG 2006) > 449-458

In this paper we investigate systematic sampling in the image- synthesis context. Systematic sampling has been widely used in stereology to improve the efficiency of different probes in experimental design. These designs are theoretically based on estimators of 1-dimensional and 2-dimensional integrals. For the particular case of the characteristic function, the variance of these estimators has been...

chapter

History-Based Selective Boolean Operations for Feature-Based Multi-resolution Modeling

Sang Hun Lee, Kunwoo Lee, Sungchan Kim

Lecture Notes in Computer Science > Computational Science and Its Applications - ICCSA 2006 > Technical Session on Computer Graphics (TSCG 2006) > 459-468

The feature-based multi-resolution models of a solid represent an object at different levels of detail (LOD), particularly in the unit of feature, according to a certain LOD criterion. The need of feature-based multi-resolution modeling is currently increasing for various engineering tasks, such as analysis, network-based collaborative design, virtual prototyping and manufacturing. To provide feature-based...

chapter

Path Finding Method for Various Applications

Jaesung Song, Manseung Seo, Masahiko Onosato

Lecture Notes in Computer Science > Computational Science and Its Applications - ICCSA 2006 > Technical Session on Computer Graphics (TSCG 2006) > 469-479

Increasing the robustness and flexibility of the tool path finding method may broaden the application fields of pocket machining. We aim to develop a path finding method for various applications. Through an integration of the entire tool path finding process, the method becomes not merely optimal to generate an efficient path but also robust enough to be applied to any system with any configuration...

chapter

Natural-Textured Mesh Stream Modeling from Depth Image-Based Representation

Seung Man Kim, Jeung Chul Park, Kwan H. Lee

Lecture Notes in Computer Science > Computational Science and Its Applications - ICCSA 2006 > Technical Session on Computer Graphics (TSCG 2006) > 480-489

This paper presents modeling techniques to generate natural-textured 3D mesh stream from depth image-based representation (DIBR). Although DIBR is a useful representation for expressing 2.5D information of dynamic real objects, its usage is limited to point-based applications. In order to generate smooth and textured 3D mesh models, depth images are captured using active depth sensors, and they are...

chapter

Workload Characterization in Multiplayer Online Games

Pedro Morillo, Juan Manuel Orduña, Marcos Fernández

Lecture Notes in Computer Science > Computational Science and Its Applications - ICCSA 2006 > Technical Session on Computer Graphics (TSCG 2006) > 490-499

In recent years, distributed virtual environments (DVEs) have become a major trend in distributed applications, mainly due to the enormous popularity of multiplayer online games in the entertainment industry. Although the workload generated by avatars in a DVE system has already been characterized, the special features of multiplayer online games make these applications to require a particular workload...

chapter

Delaunay-Based Polygon Morphing Across a Change in Topology

Xiaqing Wu, John K. Johnstone

Lecture Notes in Computer Science > Computational Science and Its Applications - ICCSA 2006 > Technical Session on Computer Graphics (TSCG 2006) > 500-509

We present a new object-based algorithm for morphing between two shapes with an arbitrary number of polygons and arbitrarily different topology. Many solutions have been proposed for morphing between two polygons. However, there has been little attention to morphing between different numbers of polygons, across a change in topology. A modified conforming Delaunay triangulation is used to build the...

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INFONA - science communication portal

Computational Science and Its Applications - ICCSA 2006
International Conference, Glasgow, UK, May 8-11, 2006. Proceedings, Part I

The Study on Three Stages in Retinal Mechanism

Curvature Monotony Condition for Rational Quadratic B-spline Curves

Estimation of Input Ranking Using Input Sensitivity Approach

A Collaborative Design Environment

Towards a High Integrity XML Link Update in Object-Relational Database

Various Types of Attacks and Solutions Regarding Secure Remote User Access over Insecure Networks

Revealing Statistical Independence of Two Experimental Data Sets: An Improvement on Spearman’s Algorithm

Parallelizable Computational Technique for Singularly Perturbed Boundary Value Problems Using Spline

Practical Boolean Operations on Point-Sampled Models

Dynamic Brush Stroke Generation for an Impressionist Effect

Image-Based 3D Face Modeling from Stereo Images

Perception-Guided Simplification for Real Time Navigation of Very Large-Scale Terrain Environments

3D Building Reconstruction from LIDAR Data

Efficient Computation of Elliptic Gabriel Graph

Systematic Sampling in Image-Synthesis

History-Based Selective Boolean Operations for Feature-Based Multi-resolution Modeling

Path Finding Method for Various Applications

Natural-Textured Mesh Stream Modeling from Depth Image-Based Representation

Workload Characterization in Multiplayer Online Games

Delaunay-Based Polygon Morphing Across a Change in Topology

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Computational Science and Its Applications - ICCSA 2006
International Conference, Glasgow, UK, May 8-11, 2006. Proceedings, Part I