CGA'08 Program

The alpha-Embracing Countour
Abellanas Manuel, Claverol Mercè, Matos Inês

Automatically approximating 3D points with co-axisal objects
Tempero Russell, Bereg Sergey, Meng Xiangxu, Tu Changhe, Yang Chenglei, Zhu Binhai

On finding large empty convex bodies in 3D scenes of polygonal models
Uday Chebrolu, Piyush Kumar, J.S.B.Mitchell

Computing Distance Functions from Generalized Sources on Weighted Polyhedral Surfaces
Fort Marta, Sellarès J.Antoni

Spherical Distance Transforms
Michikawa Takashi, Suzuki Hiromasa

Extraction of Skeletal Meshes from Volumetric Data by Sparse Polynomial Approximation
Nagai Yukie, Ohtake Yutaka, Kase Kiwamu, Suzuki Hiromasa

Estimating the Maximum Hidden Vertex Set in Polygons
Bajuelos Antonio , Canales Santiago, Hernández Gregorio, Martins A. Mafalda

Fingerprint Matching Algorithm Based On Voronoi Diagram
Khazaei Hamzeh, Mohades Khorasani Ali

Multi-Scale 3D Morse Complexes
Comic Lidija, De Floriani Leila

On the Structure of Straight Skeletons
Vyatkina Kira

Locally Delaunay Realizability of Regular Series-Parallel Graphs
Grilli Luca, Hong Seok-Hee, Symvonis Antonios, Wormser Camille

A Discrete Approach to Multiresolution Curves and Surfaces
Olsen Luke, Samavati Faramarz

A note on Approximate Minimum Volume Enclosing Ellipsoid of Ellipsoids
Jambawalikar Sachin, Kumar Piyush

 

CGA'07 Program

Paper Title

 Authors

Affiliation

Some Problems Related to Good Illumination

Manuel Abellanas - Facultad de Informatica, Universidad Politecnica de Madrid

 

Antonio Bajuelos - Departamento de Matematica & CEOC, Universidade de Aveiro

 

Ines Matos - Departamento de Matematica & CEOC, Universidade de Aveiro

A New Dynamic Programming Algorithm for Orthogonal Ruler Folding Problem in

d-Dimensional Space

Ali Nourollah - Department of Computer Engineering &IT, Amirkabir University of Technology

 

Mohammad Reza Razzazi - Department of Computer Engineering &IT, Amirkabir University of Technology

Efficient Colored Point Set Matching Under Noise

Yago Diez - University of Girona

 

Joan Antoni Sellares - University of Girona

On intersecting a set of isothetic line segments with a polygon of minimum area

Asish Mukhopadhyay - University of Windsor

 

Eugene Greene - University of Windsor

 

Seela Veerbhadreshwar Rao - Indian Institute of Technology, Guwahati

Real-time Triangulation of Molecular Surfaces

Joonghyun Ryu - Voronoi Diagram Research Center, Hanyang University

 

Rhohun Park - Voronoi Diagram Research Center, Hanyang University

 

Jeongyeon Seo - Department of Industrial Engineering, Hanyang University

 

Chongmin Kim - Department of Industrial Engineering, Hanyang University

 

Hyun Chan Lee - Department of Industrial Engineering , Hongik University

 

Deok-Soo Kim - Department of Industrial Engineering, Hanyang University

Determining Visibility Between Two Objects in Planar Polygonal Scenes

Mostafa Nouri - Computer Engineering Department, Sharif university of Technology-IPM School of Computer Scince

 

Alireza Zarei - Computer Engineering Department, Sharif university of Technology-IPM School of Computer Scince

 

Mohammad Ghodsi - Computer Engineering Department, Sharif university of Technology-IPM School of Computer Scince

Shortest Path Queries Between Geometric Objects on Surfaces

Hua Guo - School of Computer Science, Carleton University

 

Anil Maheshwari - School of Computer Science, Carleton University

 

Doron Nussbaum - School of Computer Science, Carleton University

 

Jorg-Rudiger Sack - School of Computer Science, Carleton University

Optimal Parameterized Rectangular Coverings

Stefan Porschen - Universitaet Koeln, Institut fuer Informatik

Shortest Path Queries in a Simple Polygon for 3D Virtual Museum

Chenglei Yang - School of Computer Science and Technology, Shandong University

 

Meng Qi - School of Computer Science and Technology, Shandong University

 

Jiaye Wang - School of Computer Science and Technology, Shandong University

 

Xiaoting Wang - School of Computer Science and Technology, Shandong University

 

Xiangxu Meng - School of Computer Science and Technology, Shandong University

Linear Axis for General Polygons: Properties and Computation

Kira Vyatkina - Research Institute For Mathematics and Mechanics, Saint Petersburg State University

 

Vadim Trofimov - SPE "Air and Marine Electronics"

A Geometric Approach to Clearance Based Path Optimization

Mahmudul Hasan - University of Calgary

 

Marina L. Gavrilova - University of Calgary

 

Jon Rokne - University of Calgar

Kinetic Convex Hull Algorithm Using Spiral Kinetic Data Structure

Sajedi Ali, Mohammad Reza Razzazi (short paper)

3D Visibility and the Partial Visibility Complex

NouriBygi Mojtaba, Ghodsi Mohammad (short paper)

Obstacle Avoiding Euclidean Steiner Minimal Tree in Simple Polygon

Asadi Ali, Mohammad Reza Razzazi (short paper)

 

CGA'06 Program

Surface Reconstruction from Large Point Clouds Using Virtual Shared Memory Manager

Josef Kohout, Michal Varnuska and Ivana Kolingerova

Upper Bound on Dilation of Fan Triangulation over the Set of Points on a Regular Polygon

N. Amarnadh and Pinaki Mitra

 

Optimal guard placement problem under L-visibility

Debabrata Bardhan, Sasanka Roy and Sandip Das

Visibility Maps of Segments and Triangles in 3D

Esther Moet, Christian Knauer and Marc van Kreveld

Non-Euclidean Metrics and Chordal Space Structures

José Andrés Díaz, César Otero, Reinaldo Togores and Cristina Manchado

An efficient algorithm for mobile guarded guards in simple grids

Adrian Kosowski, Michal     Malafiejsk, and Pawel Zylinski

Algorithms for Rectangular Covering Problems

Stefan Porschen

Computing terrain multi-visibility maps for a set of view segments using graphics hardware

N. Coll, M. Fort, N. Madern and J. A. Sellares

Backward error analysis in computational geometry

D. Jiang and Neil F. Stewart

 

Reply to 'Backward error analysis in computational geometry '
 
Lutz Kettner, Kurt Mehlhorn,
Sylvain Pion, Stefan Schirra and Chee Yap

Two Map Labeling Algorithms for GIS Applications

Marina Gavrilova

Fast Intersections for Subdivision Surfaces

Aaron Severn and Faramarz Samavati

A Beta-Shape from the Voronoi Diagram of Atoms for Protein Structure Analysis

Jeong-Yeon Seo, Donguk Kim, Cheol-Hyung Cho, and Deok-Soo Kim

Reduction of the search space in the edge-tracing algorithm for the Voronoi diagram for 3D balls

Youngsong Cho, Donguk Kim, Hyun Chan Lee, Joon Young Park, and Deok-Soo Kim

 

Routing Properties of the Localized Delaunay Triangulation over Heterogeneous Ad-Hoc Wireless Networks

Mark D. Watson and J. Mark Keil

 

A speculative approach to clipping line segments

Frank Devai

Fault Tolerant Guarding of Grids

Adrian Kosowski, Michal      Malafiejski, and Pawel Zylinski

 

Approximation of Optimal Moving Paths of Huge Robot Reclaimer with a 3D Range Finder

     Kwan-Hee Lee, Hyo-Jung Bae and Sung-Je Hong

Tunable Bounding Volumes for Monte- Carlo Applications

Yuan-Yu Tsai, Chung-Ming Wang, Chung-Hsien Chang, and Yu-Ming Cheng

 

A Data Hiding Algorithm for Point-Sampled Geometry

Yu-Ming Cheng,  Chung-Ming Wang and Yuan-Yu Tsai

 

An Algorithm for Rendering Vertexes and Edges of Polyhedron with High Order Geometric Continuity

Xiaolin Lu

CGA'05 Program

Plenary Speaker:
Prof. Tetsuo Asano, JAIST, JAPAN

Invited lecture:
Prof. Christopher Gold, EU Chair, University of Glamorgan

Please note that DETAILED CGA'05 Workshop program is available at: ICCSA05_Day2_May10

LIST OF PRESENTED PAPERS:

1. “Weakly cooperative guards in grids.”
Michal Malafiejski, Pawel Zylinski

2. “Mesh Generation for Symmetrical Geometries.”
Krister Ahlander

3. “A certified Delaunay graph conflict locator for semi-algebraic sets.”
François Anton

4. “The offset to an algebraic curve and an application to conics.”
François Anton, Ioannis Emiris, Bernard Mourrain and Monique Teillaud

5. “Computing the Least Median of Squares Estimator in Time.”
Thorsten Bernholt

6. “Pocket recognition on a protein using Euclidean Voronoi diagram of atoms.”
Deok-Soo Kim, Cheol-Hyung Cho, Youngsong Cho, Chung In Won, and Dounguk Kim

7. “Region expansion by flipping edges for Euclidean Voronoi diagrams of 3D spheres based on a
radial data structure.”
Donguk Kim, Youngsong Cho, and Deok-Soo Kim

8. “Analysis of the Nicholl-Lee-Nicholl algorithm.”
Frank Devai

9. “Flipping to Robustly Delete a Vertex in a Delaunay Tetrahedralization.”
Hugo Ledoux, Christopher M. Gold, George Baciu

10. “A Novel Topology-based Matching Algorithm for Fingerprint Recognition in the Presence of
Elastic Distortions”
Chenfeng Wang and Marina L. Gavrilova

11. “Bilateral Estimation of Vertex Normal for Point-sampled Models.”
Guofei Hu, Jie Xu, Lanfang Miao and Qunsheng Peng

12. “A Point Inclusion Test Algorithm for Simple Polygons.”
Weishi Li, Eng Teo Ong, Shuhong Xu, Terence Hung

13. “A Modified Nielson's Side-Vertex Triangular Mesh Interpolation Scheme.”
Zhihong Mao, Lizhuang Ma, Wuzheng Tan

14. “An Acceleration Technique for the Computation of Voronoi Diagrams using Graphics hardware.”
Osami Yamamoto

15. “On the rectangular subset closure of point sets.”
Stefan Porschen

16. “Computing Optimized Curves with NURBS using Evolutionary Intelligence.”
M. Sarfraz, S. A. Raza and M. H. Baig

17. “A Novel Delaunay simplex technique for detection of crystalline nuclei in dense packings of
spheres.”
A.V. Anikeenko, M.L. Gavrilova, N.N. Medvedev

18. “Recognition of Minimum Width Color-spanning Corridor and Minimum Area Color-spanning
Rectangle.”
Sandip Das, Partha P. Goswami, Sabhas Nandy

19. “Volumetric reconstruction of unorganized set of points with implicit surfaces.”
Vincent Bénédet, Loïc Lamarque, Dominique Faudot
 


CGA'04 program

CGA'04 Invited lecture:

Prof. Hervé Brönnimann, Polytechnic University, New York, USA, "Towards space-efficient geometric algorithms"

LIST OF PRESENTED PAPERS:

 CGA'04 Theoretical Track

 2. Title               Geometric Graphs Realization as Coin Graphs
Authors             Manuel Abellanas and Carlos Moreno­Jim’enez

 3.  Title               Disk covering problem with application to digital halftoning
 Authors             Prof. Tetsuo ASANO, Brass, Sasahara

  4.  Title               On Local Transformations in Plane Geometric Graphs Embedded in Small Grids
Authors             Manuel Abellanas, Prosenjit Bose, Alfredo Garcia, Ferran Hurtado, Pedro Ramos, Eduardo Rivera-Campo, Javier Tejel

   5.  Title               Reducing the time complexity of Minkowski­sum based similarity calculations
  Authors             Henk Bekker, Axel Brink

 6  Title               Plane-sweep algorithm of O(nlogn) for the inclusion hierarchy among circles
 Authors             Deok-Soo Kim, Byunghoon Lee and Kokichi Sugihara

  7  Title               Shortest paths for disc obstacles
 Authors             Deok-Soo Kim, Kwangseok Yu, Donguk Kim and Chee Yap

8  Title               Improving the Global Continuity of the Natural Neighbor Interpolation
 Authors             Hisamoto HIYOSHI, Kokichi SUGIHARA

 9 Title               Combinatorics and triangulations
 Authors             Tomas Hlavaty, Vaclav Skala

   10 Title               Approximations for two geometric optimization problems
 Authors             Minghui Jiang, Brendan Mumey, Zhongping Qin, Andrew Tomascak and Binhai Zhu

11 Title               Computing Largest Empty Slabs
 Authors             J. M. Diaz-Banez, M. A. Lopez, J. A. Sellares

   12 Title               3D-Color-Structure-Code - A New Non-Plainness Island Hierarchy
 Authors             Patrick Sturm

13 Title               Quadratic-Time Linear-Space Algorithms for Generating Orthogonal Polygons with a Given Number of Vertices
 Authors             Ana Paula Tomas and Antonio Leslie Bajuelos

14 Title               Partitioning Orthogonal Polygons by Extension of All Edges Incident to Reflex Vertices
Authors             Antnio Leslie Bajuelos, Ana Paula Toms, Fbio Marques

15 Title               On the Time Complexity of Rectangular Covering Problems in the discrete plane
 Authors             Stefan Porschen

  16  Title               Approximating Smallest Enclosing Balls
 Authors             Frank Nielsen, Richard Nock

 

CGA'04 Applied Track

 17.  Title               Computational geometry Applied to Designing Spatial Data structures
  Authors             Josй A. Diaz, Reinaldo Togores, Cйsar Otero

18.  Title               Robust and Fast Algorithm for Computing Exact and Approximate Shortest Visiting Routes
 Authors             H. Johnsson

    19. Title               Automated Model Generation System based on Freeform Deformation and Genetic Algorithm
 Authors             Park and Kwan H. Lee, Ph. D

   20 Title               Speculative Parallelization of a Randomized Incremental Convex Hull Algorithm
 Authors             Marcelo Cintra, Diego R. Llanos, Belen Palop

   21 Title               The employment of regular triangulation for constrained Delaunay triangulation
 Authors             Pavel Maur, Ivana Kolingerova

  22 Title               The Anchored Voronoi Diagram
 Authors             J. M. Diaz-Banez,   F. Gomez, I. Ventura

  23 Title               Implementation of the Voronoi-Delaunay method for analysis of intermolecular voids
 Authors             Anikeenko, Alinchenko, Voloshin, Medvedev, Gavrilova, Jedlovszky

   24 Title               Approximation of the Boat-Sail Voronoi Diagram and Its Application
 Authors             Tetsushi Nishida and Kokichi Sugihara

   25  Title               Incremental Adaptive Loop Subdivision
 Authors             Hamid-Reza Pakdel and Faramarz Samavati

  26 Title               Multiresolution For Polygonal Silhouette Error Removal
  Authors             Foster, Mario Costa Sousa, Faramarz Samavati, Brian Wyvill

  27 Title               Cylindrical approximation of a neuron from reconstructed polyhedron
 Authors             Wenhao Lin, Binhai Zhu, Gwen Jacobs, and Gary Orser

   28 Title               Skeletizing 3D objects by projections
 Authors             D. Menegaux, D. Faudot, H. Keddouchi

  29 Title               A Practical Algorithm for Approximating Shortest Weighted Path between a Pair of Points on Polyhedral Surface
 Authors             Sasanka Roy, Sandip Das and Subhas C. Nandy

CGA'03 Program

CGA'03 Invited lecture: Prof. Godfried Toussaint, McGill University, Canada
Title: Geometric Graphs for Improving Nearest Neighbor Decision Rules.
"

 

LIST OF PRESENTED PAPERS:

Title: On the Reliability of Triangle Intersection in 3D
Authors: Steven Robbins, Sue Whitesides

 Title: Red-Blue Separability Problems in 3D
Authors: Ferran Hurtado, Carlos Seara, and Saurabh Sethia

Title: A Parametrically-optimized Morphing Scheme of Polygonal Meshes
Authors: Jie Shen

 Title: Two-dimensional range search based on the Voronoi diagram
Authors: Takeshi Kanda, Kokichi Sugihara

 Title: Computing a closest point to a query hyperplane in three and higher dimensions.
Authors: Pinaki Mitra and Asish Mukhopadhyay

Title: Computing a largest empty arbitrary oriented rectangle: Theory and Implementation
Authors: Asish Mukhopadhyay

Title: An approximate morphing between polylines
Authors: Sergei Bereg (formerly known as Sergei Bespamyatnikh)

Title: Finding Coarse Grained Parallelism in Computational Geometry Algorithms
Authors: Volodymyr Beletskyy

Title: Dynamically maintaining a hierarchical planar  Voronoi diagram approximation
Authors: Imma Boada, Narcis Coll and J. Antoni Sellares

Title: Straight-line Drawings of General Trees with Linear Area  and Arbitrary Aspect Ratio
Authors: Ashim Garg and Adrian Rusu

Title: Efficient proximity search for 3-D cuboids
Authors: Jie Gao and Rakesh Gupta

Title: On Estimating Result Sizes of Multi-way Spatial Joins
Authors: Ho-Hyun Park and Chin-Wan Chung

Title: Voronoi Diagram of Circles in a Large Circle
Authors: Deok-Soo Kim, Donguk Kim, and Kokichi Sugihara

Title: The integer hull of a convex rational polytope
Authors: Jean B. Lasserre

Title: Connected Guards in Orthogonal Art Galleries
Author: Val Pinciu

Title: Four Colouring the Vertices of the Triangulation of a Polygon Containing a Hole
Authors: G M Seed, D E R Clark, R Ocone and X Yang

Title: Partitioning Polygons into  Tree  (+/-)Y-Monotone and Y-Monotone Subpolygons
Authors: Ralph P. Boland, Jorge Urrutia

Title: An Explicit Solution for Computing the Euclidean d-dimensional Voronoi Diagram of Spheres in a Floating-Point Arithmetic
Author: M. Gavrilova

 

CGA'02 Program

Invited Speaker: Mark Overmars, Utrecht University
Recent Developments in Motion Planning

Contributed Presentation: Pieter Huybers, the Netherlands
The Morphology of Building Structures

LIST OF PRESENTED PAPERS:


Theoretical track I

Recent Developments in Motion Planning (Invited lecture)
Mark Overmars (1 hour)

Extreme Distances in Multicolored Point Sets,
Adrian Dumitrescu and Sumanta Guha

Balanced Partition of Minimum Spanning Trees,
Mattias Andersson, Joachim Gudmundsson, Christos Levcopoulus, Giri
Narasimhan


Theoretical track II
 

On the Quality of Partitions based on Space-Filling Curves
Jan Hungershofer, Jens-Michael Wierum

The largest empty annulus problem
J. M. Diaz-Banez, F. Hurtado, H. Meijer, D. Rappaport, T. Sellares

Mapping Graphs on the Sphere to the Finite Plane,
Henk Bekker, Koen De Raedt

Improved optimal Weighted Links Algorithm
Ovidiu Daescu

A Linear Time Heuristics for Trapezoidation of GIS Polygons
Gian Paolo Lorenzetto, Amitava Datta


Applied track I

The Morphology of building structures (contributed presentation)
Pieter Huybers
(40 minutes)

Voronoi and radical tessellations of packings of spheres
A. Gervois and L. Oger and P. Richard and J.P. Troadec

Collision Detection Optimization in a Multi-Particle System
M. Gavrilova, J. Rokne

Optimization Techniques in Event-Driven Simulation of Shaker Ball Mill
M. Gavrilova, J. Rokne, D. Gavrilov and O. Vinogradov


Applied track II


Modified DAG Location for Delaunay Triangulation,
Ivana Kolingerova

TIN Meets CAD - Extending the TIN Concept in GIS
Rebecca, O.C. Tse and Christopher Gold

Extracting Meaningful Slopes from Terrain Contours
Maciej Dakowicz and Christopher Gold

Duality in Disk Induced Flows,
Joachim Giesen, Matthias John

Improvement of Digital Terrain Model Interpolation Using SFS
Techniques with Single Satellite Imagery,
Mohammad A. Rajabi, J. A. Rod Blais


Applied track III

Implementing an Augmented Scene Delivery System
Jim Mower

Inspection Strategies for Complex Curved Surfaces Using CMM
R. Wirza, M.S. Bloor J. Fisher


The Free Form Deformation of Phytoplankton Models
Anton M. Lyakh

Sensitive movement in dynamic geometry,
Arno Goudsmit and Joachim Mowitz
 

CGA'01 Program

To view electronic proceedings of the CGA'01, follow the link to LNCS web site: http://turing.zblmath.fiz-karlsruhe.de/cs/www_lncs.1.html 
Volume 2073, Springer Verlag.

Invited speaker: Prof.  Kokichi Sugihara, University of Tokyo, Japan

Selected papers appeared in CGA'01 (in random order):

"The Most Robust Algorithm for a Circle Set Voronoi Diagram in a Plane," by Deok-Soo Kim, Donguk Kim, J. Ryu, K. Sugihara

"Apollonius Tenth Problem as a Point Location Problem," by
Deok-Soo Kim, Donguk Kim, J. Ryu, K. Sugihara


"Robustness Issues in Surface Reconstruction," by Tamal Dey, Joachim Giesen, Wulue Zhao


"Crystal Voronoi Diagram and Its Applications to
Collision-Free Paths," by Kei Kobayashi and Kokichi Sugihara

"Multipli Guarded Guards in Orthogonal art Galleries," by 
S. Michael and V. Pinci

"Illuminating Polygons with vertex "pi"-floodings," by Csaba D. Toth

"Exploring an Unknown Polygonal Environment with Bounded Visibility," by Amitava Bhattacharya, Sabir Ghosh and Sudeep Sarkar 

"Fast Maintenance of Rectilinear Centers," by Sergei Bespamyatnikh and Michael Segal

"An Efficient Algorithm to Calculate the Minkowski Sum of Convec
3D Polyhedra," by Henk Bekker, Jos B. T. M. Roerdink

"Parallel Optimal Weighted Links," by Ovidiu Daescu

This page was last updated on 09/22/09.

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