S3PM-2017 :: International Convention on

SPM   Opening & Introductions

Session Chair: Stefanie Hahmann, Ensimag & INRIA

SPM A   Paper Presentations

Shape Analysis and Representation - Part I

Session Chair: Jörg E. Peters, Univ. of Florida

SPM-A-1   "Detecting the Intersection of Two Convex Shapes by Searching on the 2-Sphere"
        -Samuel Hornus

        Presentation Time: 09:00 - 09:25

SPM-A-2   "Over-Constraints Detection and Resolution in Geometric Equation Systems"
        -Hao Hu, Mathias Kleiner, and Jean-Philippe Pernot

        Presentation Time: 09:25 - 09:50

SPM-A-3   "Rasterized Planar Face Complex"
        -Guillaume Damiand and Jarek Rossignac

        Presentation Time: 09:50 - 10:15

SPM B   Paper Presentations

Shape Analysis and Representation - Part II

Session Chair: Gershon Elber, Technion

SPM-B-1   "Robust Free Space Construction for a Polyhedron with Planar Motion"
        -Elisha Sacks, Nabeel Butt, and Victor Milenkovic

        Presentation Time: 10:45 - 11:10

SPM-B-2   "A General Framework for 3D Model Co-alignment"
        -Xuanmeng Xie, Shan Luo, and Jieqing Feng

        Presentation Time: 11:10 - 11:35

SPM-B-3   "Diffusion-based Non-uniform Regularization for Variational Shape Deformation"
        (Invited CAD paper)
        -Lifeng Zhu, Wei Li, Xiaorui Zhang, and Aiguo Song

        Presentation Time: 11:35 - 12:00

SPM ✦   Keynote Speech (1)

Computation of Frame Fields Using Ginzburg-Landau Functional:
Application to Quad and Hex Meshing

Keynote Speaker: Jean-François Remacle, Professor at Univ. Catholique de Louvain

This presentation essentially deals with indirect (quad-) hex-dominant. Several topics will be covered: -Frame fields are an essential tool for constructing such meshes. We propose here a formulation that is based on Gizburg-Landau functional. -Hex-dominant meshing relies on the detection of adjacent tetrahedra that may be combined to form hexahedra. In this presentation, we introduce a new algorithm that performs this identification and build the largest set of potential hexes from an input tetrahedral mesh. -Parallelization of the whole mesh generation process on a Knigh’s Landing architecture is also presented.

Session Chair: Mario Botsch, Bielefeld Univ.

SPM C   Paper Presentations

Parametric Representation and Refinement

Session Chair: Xiaoping Qian, UW-Madison

SPM-C-1   "Improved Shape for Refinable Surfaces with Singularly Parameterized Irregularities"
        -Kestutis Karciauskas and Jörg E. Peters

        Presentation Time: 15:10 - 15:35

SPM-C-2   "Patchwork B-Spline Refinement"
        -Nora Engleitner and Bert Jüttler

        Presentation Time: 15:35 - 16:00

SPM-C-3   "Solving Piecewise Polynomial Constraint Systems with Decomposition Using Subdivision-Based Solver"
        -Boris van Sosin and Gershon Elber

        Presentation Time: 16:00 - 16:25

SPM D   Paper Presentations

Parametric Design and Surface Construction

Session Chair: Michael Barton, BCAM

SPM-D-1   "P-Curves and Surfaces: Parametric Design with Global Fullness Control"
        -István Kovács and Tamás Várady

        Presentation Time: 16:45 - 17:10

SPM-D-2   "Surface Reconstruction by Computing Restricted Voronoi Cells in Parallel"
        -Dobrina Boltcheva and Bruno Levy

        Presentation Time: 17:10 - 17:35

SPM-D-3   "Isogeometric Segmentation: Construction of Cutting Surfaces"
        -Michael Haberleitner and Bert Jüttler

        Presentation Time: 17:35 - 18:00

SPM E   Paper Presentations

Mesh Processing

Session Chair: Leif Kobbelt, RWTH Aachen Univ.

SPM-E-1   "Distributed Poly-square Mapping for Large-scale Semi-structured Quad Mesh Generation"
        -Celong Liu, Wuyi Yu, Zhonggui Chen, and Xin Li

        Presentation Time: 09:00 - 09:25

SPM-E-2   "Disjoint Convex Shell and its Applications in Mesh Unfolding"
        -Yun-Hyeong Kim, Zhonghua Xi, and Jyh-Ming Lien

        Presentation Time: 09:25 - 09:50

SPM-E-3   "An Optimization-driven Approach for Computing Geodesic Paths on Triangle Meshes"
        -Bangquan Liu, Shuangmin Chen, Shiqing Xin, Ying He, Zhen Liu, and Jieyu Zhao

        Presentation Time: 09:50 - 10:15

SPM F   Paper Presentations

Additive Manufacturing

Session Chair: Charlie C. L. Wang, TU Delft

SPM-F-1   "Lattice Structure Lightweight Triangulation for Additive Manufacturing"
        -Laurent Chougrani, Jean-Philippe Pernot, and Philippe Veron

        Presentation Time: 10:45 - 11:10

SPM-F-2   "Sample-based Synthesis of Two-scale Structures with Anisotropy"
        -Xingchen Liu and Vadim Shapiro

        Presentation Time: 11:10 - 11:35

SPM-F-3   "Support Structure Constrained Topology Optimization for Additive Manufacturing"
        (Invited CAD paper)
        -Amir M. Mirzendehdel and Krishnan Suresh

        Presentation Time: 11:35 - 12:00

SPM ✦   Keynote Speech (2)

Driving 3D and 4D Printing Forward with Computational Design

Keynote Speaker: Kristina Shea, Professor at ETH Zürich

The recent rise in digital fabrication, including 3D and 4D printing, may be the best thing that has ever happened to the area of computational design. For years we have been developing algorithms and methods for automatically generating and optimizing designs from large, complex solution spaces. Today, designers struggle with just this, to design parts that take full advantage of the complex shapes and material combinations that are now possible with 3D printing. 4D printing extends on this to enable designs to reconfigure themselves in time after printing. This is a new and exciting playground for computational design. Highlights of our research on novel methods for automatically generating, simulating, and optimizing structural and mechanical systems that can be directly fabricated with 3D printing are presented. The focus is on a multi-material polymer-based process that has also enabled the development of tunable, multi-stable, reconfigurable 4D printed structures.

Session Chair: Yongjie (Jessica) Zhang, Carnegie Mellon Univ.

SPM G   Paper Presentations

3D Model Decomposition and Volumes

Session Chair: Myung-Soo Kim, Seoul National Univ.

SPM-G-1   "Automatic Decomposition of 3D-Solids into Contractible Pieces Using Reeb Graphs"
        -Birgit Strodthoff and Bert Jüttler

        Presentation Time: 15:20 - 15:45

SPM-G-2   "Explicit Cylindrical Maps for Volumes with Arbitrary Topology"
        -Marco Livesu, Marco Attene, Giuseppe Patanè, and Michela Spagnuolo

        Presentation Time: 15:45 - 16:10

SPM-G-3   "Precise Algebraic-based Swept Volumes for Arbitrary Free-form Shaped Tools Towards Multi-axis CNC Machining Verification"
        -Jinesh Machchhar, Denys Plakhotnik, and Gershon Elber

        Presentation Time: 16:10 - 16:35

SPM   Best Paper Awards & Business Meeting

SPM General Assembly

Session Chair: Jarek Rossignac, Georgia Tech

SPM Best Paper Awards

SPM-2018 Announcement

Session Chair: Michael Barton, BCAM

Short Startup Talks + Q&A

Geometry in Action: Startup Ideas & Challenges

Session Chair: Ye Wang, Onshape

Join us for mini talks and Q&A sessions by startup companies building cutting edge products and services.

GiA-T-01   "Challenges in Developing CAD for the Future"
        -Ye Wang

GiA-T-02   "From Academic Project to a Commercial Product"
        -Alec Rivers

GiA-T-03   "Building Physics Analysis for the Web"
        -Andrew Taber

GiA-T-04   "Designing Custom-fit Prosthetics"
        -Jeff Huber

GiA-T-05   "A Factory at Your Fingertips: Automated Manufacturing at Plethora"
        -Wesley Smith

GiA-T-06   "Non-linear Optimization of Geometric Properties"
        -Andrew Zukoski

GiA-T-07   "Just Make a Bigger One!"
        -Sam Prest

MS-1   Mini-Symposium (Track 1)

Architected Materials

Session Chair: Jan Vandenbrande, DARPA

The biggest problem with solid modeling is the first word: solid. When solid modeling was first conceived about 40 years ago, it was aimed to represent machined parts made out of iso-tropic materials, meaning metals. We have now reached a point where advances in manufacturing technology enables us fine grained control over material properties at each point in space. Unfortunately, our design tools have not kept up with these technologies, and are not capable of representing nor synthesizing the complex interaction of shape with custom, space varying, material properties.

The aim of this workshop is to provide insight into the challenges faced by researchers and practitioners who are modeling new material architectures and the implication for design. The intent is to cover a range of new of materials across several domains (e.g., woven structures, dielectrics, and metals).

MS-1-1: "Weaving Rocks"
        -Brian Cox

        Presentation Time: 09:40 - 10:00

MS-1-2: "Modeling and Analysis of Thin and Curvy Stuff"
        -Jon Gosse

        Presentation Time: 10:00 - 10:20

MS-1-3: "Printing Voltage Ladders"
        -Rob Sharpe

        Presentation Time: 10:20 - 10:40

MS-2   Mini-Symposium (Track 2)

Geometric Representations for Integrating
Isogeometric Design and Analysis - Part I

Session Chair: Xiaoping Qian, UW-Madison

Isogeometric analysis aims to bridge the geometric divide between CAD systems and FEA software tools. Over the last decade, research in isogeometric design and analysis has undergone tremendous growth and has led to substantial progress in both computer-aided design and finite element analysis fields. Different geometric representations such as NURBS, T-splines, triangular splines, manifold basis, and subdivision surfaces have been investigated for use in isogeometric analysis and integration with CAD. This minisymposium aims to capture the state-of-the-art regarding theoretical foundations and computational methods in geometric representations for integrating CAD and analysis.

MS-2-1: "Volumetric Spline Models for Isogeometric Analysis"
        -Bert Jüttler

        Presentation Time: 09:40 - 10:00

MS-2-2: "Generalizing Splines for Design and IGA with Irregular Layout"
        -Jörg E. Peters

        Presentation Time: 10:00 - 10:20

MS-2-3: "Triangular Bézier Splines for Integrating Design and Analysis"
        -Xiaoping Qian

        Presentation Time: 10:20 - 10:40

MS-3   Mini-Symposium (Track 1)

Fabrication-Aware Design

Session Chair: Helmut Pottmann, TU Wien

Geometric Modeling has so far mainly been restricted to pure shape modeling with little or no consideration of material properties, functionality and fabrication. This leads to a costly product development process with multiple feedback loops between design, engineering and fabrication. The proposed minisymposium presents recent progress on modeling systems which consider or even model material properties and other key aspects of function and fabrication of the final product already in the design phase. The three presenters address different aspects of this stream of research: (i) Barton presents results on efficient fabrication of freeform geometry with a focus on architecture and CNC machining and outlines the combination of this work with interactive design, (ii) Elber presents a novel approach for modeling of microstructures and porous materials, and (iii) Tang presents a computational approach for interactive design in the presence of nonlinear constraints. The constraints express material behavior (unstretchable material) and key issues in architectural geometry (panelization, substructure and statics).

MS-3-1: "Geometric Modeling with Manufacturable Surfaces"
        -Michael Barton

        Presentation Time: 11:00 - 11:20

MS-3-2: "Precise Construction of Micro-structures and Porous Geometry via Functional Composition"
        -Gershon Elber

        Presentation Time: 11:20 - 11:40

MS-3-3: "Guided Projection for Computational Design"
        -Chengcheng Tang

        Presentation Time: 11:40 - 12:00

MS-4   Mini-Symposium (Track 2)

Geometric Representations for Integrating
Isogeometric Design and Analysis - Part II

Session Chair: Xiaoping Qian, UW-Madison

Isogeometric analysis aims to bridge the geometric divide between CAD systems and FEA software tools. Over the last decade, research in isogeometric design and analysis has undergone tremendous growth and has led to substantial progress in both computer-aided design and finite element analysis fields. Different geometric representations such as NURBS, T-splines, triangular splines, manifold basis, and subdivision surfaces have been investigated for use in isogeometric analysis and integration with CAD. This minisymposium aims to capture the state-of-the-art regarding theoretical foundations and computational methods in geometric representations for integrating CAD and analysis.

MS-4-1: "How to Build Smooth Splines on Unstructured Quadrilateral Meshes Suited for Isogeometric analysis?"
        -Hendrik Speleers

        Presentation Time: 11:00 - 11:20

MS-4-2: "U-Splines: Splines Over Unstructured Meshes"
        -Derek Thomas and Mike Scott

        Presentation Time: 11:20 - 11:40

MS-4-3: "Integrating CAD with Abaqus: A Practical Isogeometric Analysis Software Platform for Industrial Applications"
        -Jessica (Yongjie) Zhang

        Presentation Time: 11:40 - 12:00

Industry & Government Panel

Directions for Transformative Research

Panelists:
        -George Allen, Chief Technologist and Technical Fellow at Siemens PLM Software;
        -Francesco Iorio, Head of Computational Science Research at Autodesk Research;
        -Saigopal Nelaturi, Area Manager for Computation for Automation in Systems Engineering at PARC;
        -Jack S. Snoeyink, Program Director, the Division of Computing and Communication Foundations at NSF;
        -Vijay Srinivasan, Division Chief of the Systems Integration Division of the Engineering Laboratory at NIST;
        -Jan Vandenbrande, Program Manager, the Defense Sciences Office at DRAPA;

Each invited panelist will deliver a 10 minute presentation, followed by a 5-minute Q&A session. The presentations will be followed by an open format discussion with all panelists and audience. They will:

- paint the vision for a roadmap of ambitious and transformative research;
- describe the latest, most innovative, and advanced technological developments;
- ground this vision in a global perspective of the historical evolution of research and industrial developments, as well as deployments in CAD/CAM and related fields;
- identify major research challenges and thrusts that our community must address;
- outline desired funding structures and industry/academia collaboration paradigms of the 21st century; and
- provide "man-on-moon" long-term challenges that will rally community efforts.

Session Chair: Vadim Shapiro, UW-Madison & ICSI

MS-5   Mini-Symposium (Track 1)

Generative Design for Additive Manufacturing

Session Chair: Michael Y. Wang, HKUST Robotics Institute

This mini-symposium is seeking to create a great opportunity and provide a communication platform to bring together researchers, who are working in a broad range of aspects of shape and topology optimization methods and applications. We particularly encourage submissions addressing recent advances in shape and topology optimization of interdisciplinary areas, spanning fluidics, thermal, and electromagnetism, as well as solids, structures and materials.

MS-5-1: "Project Dreamchatcher: First Steps in Generative Design"
        -Francesco Iorio

        Presentation Time: 16:20 - 16:40

MS-5-2: "Topology Optimization versus Cellular Lattices"
        -Michael Y. Wang

        Presentation Time: 16:40 - 17:00

MS-5-3: "Supporting-free Infill Modeling for Additive Manufacturing"
        -Charlie C. L. Wang

        Presentation Time: 17:00 - 17:20

MS-6   Mini-Symposium (Track 2)

Machine Learning for Geometric Computing and Design

Session Chair: Stella Yu, ICSI

Deep learning has delivered tremendous success for language and image understanding. It is nontheless still at an early stage for 3D data understanding, which is important not only for a variety of computer vision and graphics research topics, but also for a wide range of practical applications in manufacturing and design. Unlike text or images that can be represented as 1D or 2D numerical arrays, 3D data have multiple representational choices, such as volumes, polygonal meshes, depth maps, and point clouds, each tailored to specific application scenarios. They are additionally subject to more and stronger physical modeling and structural constraints, e.g. connectivity and stability. These two aspects about 3D data, representations and constraints, open up new challenges and opportunities in machine learning. In this mini-symposium, we will invite leading researchers to present their work on structural parsing, model completion, style transfer, and design discovery from their big 3D data, and discuss how to effectively represent 3D data and incorporate physical constraints into deep learning for geometric computing.

MS-6-1: "A Point Set Generation Network for 3D Object Reconstruction from a Single Image"
        -Hao Su

        Presentation Time: 16:20 - 16:35

MS-6-2: "Learning 3D by Seeing in 2D through In-Network Perspective Cameras"
        -Ersin Yumer

        Presentation Time: 16:35 - 16:50

MS-6-3: "LEGOBot - Training on Synthesized 3D Data to Enable Robots to Make with LEGO"
        -Yotto Koga and Mike Haley

        Presentation Time: 16:50 - 17:05

MS-6-4: "Deep Form - Understanding and Synthesizing 3D Shapes with Machine Learning"
        -Ara Danielyan and Mike Haley

        Presentation Time: 17:05 - 17:20

SPM+SMI   Joint Poster Session

SPM Posters

SPM-P-01   "Towards Integrating Topology Optimization and Additive Manufacturing"
        -Amir M. Mirzendehdel and Krishnan Suresh

SPM-P-02   "Averaging Compatible Surfaces for Free-form Tolerancing"
        -Mukul Sati and Jarek Rossignac

SPM-P-03   "Steadied Lattice Structures"
        -Ashish Gupta and Jarek Rossignac

SPM-P-04   "Automatic Learning of User Design Rationales from Examples"
        -Yao-Yi Chiang, Abhishek Jain, Bhaskar Bandyopadhyay, and Craig Knoblock

SPM-P-05   "A Framework for Solid Modeling and Structural Analysis of Composites with Defects"
        -Onur Bingol, Bryan Schiefelbein, Robert Grandin, Stephen Holland, and Adarsh Krishnamurthy

SPM-P-06   "Folding Thick Origami via Stacking"
        -Zhonghua Xi, Yuki Lee, Huangxin Wang, Yun-Hyeong Kim, Yue Hao, In-Suk Choi, and Jyh-Ming Lien

SPM-P-07   "Towards Thick Shells with Isostatic Microstructure"
        -Jörg E. Peters, Meera Sitharam, and Jeremy Youngquist

SPM-P-08   "DTHB3D_Reg: Dynamic Truncated Hierarchical B-Spline Based 3D Nonrigid Image Registration"
        -Aishwarya Pawar, Yongjie Zhang, Cosmin Anitescu, Yue Jia, and Timon Rabczuk

SPM-P-09   "Voronoi Cells of Non-general Position Spheres Using the GPU"
        -Zhongyin Hu, Xiang Li, Adarsh Krishnamurthy, Iddo Hanniel, and Sara McMains

SPM-P-10   "Power Histogram for Circle Detection on Images"
        -Bodi Yuan and Min Liu

SPM-P-11   "On Interoperability Challenges and Scenarios"
        -Morad Behandish and Vadim Shapiro

SPM-P-12   "Toward Optimal Sensor Placement in 3D Architectural CAD"
        -Young Min Kim and Chandrajit Bajaj

SMI Posters

SMI-P-01   "Computing Mass Properties of Objects with Continuously Varying Density Distributions"
        -Suraj Musuvathy and George Allen

SMI-P-02   "Efficient Point Membership Classification on Similarity-steady Patterns"
        -Kelsey H. Kurzeja and Jarek Rossignac

SMI-P-03   "Splat Rendering Enhancement via Super Resolution"
        -Giang Bui, Truc Le, and Ye Duan

SMI-P-04   "Extraction of Woven Structures of Daily Goods from X-ray CT Volumes"
        -Yukie Nagai, Yutaka Ohtake, and Hiromasa Suzuki

SMI-P-05   "Individual Tree Mapping from LiDAR Point Clouds based on Topological Tools"
        -Federico Iuricich, Xin Xu, and Leila De Floriani

SMI-P-06   "An Exact and Efficient 3D Mesh Intersection Algorithm Using Only Orientation Predicates"
        -Salles Viana Gomes de Magalhaes, W. Randolph Franklin, and Marcus V. A. Andrade

FASE Posters

FASE-P-01   "Toolpath Planning for Continuous Extrusion Additive Manufacturing"
        -Chloe Fleming, Stephanie Walker, Callie Branyan, Austin Nicolai, Geoffrey Hollinger, and Yigit Menguc

FASE-P-02   "Modeling in ShapeJS"
        -Vladimir Bulatov and Alan Hudson

FASE-P-03   "Toward Fabricating Rigid Wireframes from Z-Bent Helical Springs"
        -James Mallos

SMI   Opening & Introductions

Session Chair: Daniele Panozzo, NYU

SMI A   Paper Presentations

​Reconstruction

Session Chair: Nina Amenta, UC Davis

SMI-A-1   "​Patterns from photograph: Reverse-engineering Developable Products"
        -​Amélie Fondevilla, Adrien Bousseau, Damien Rohmer, Stefanie Hahmann, and Marie-Paule Cani

        Presentation Time: 09:00 - 09:25

SMI-A-2   "​Accurate 3D Face Reconstruction via Prior Constrained Structure from Motion"
        -​Matthias Thomas Hernandez, Jongmoo Choi, Tal Hassner, and Gerard Medioni

        Presentation Time: 09:25 - 09:50

SMI-A-3   "​Extraction of Tubular Shapes from Dense Point Clouds and Application to Tree Reconstruction from Laser Scanned Data"
        -Joris Ravaglia, Alexandra Bac, and Richard A Fournier

        Presentation Time: 09:50 - 10:15

SMI B   Paper Presentations

​​Visibility and Maps

Session Chair: Marco Livesu, CNR-IMATI

SMI-B-1   "​​On the Visibility Locations for Continuous Curves"
        -​​Sarang Joshi, ​​Yoshida Rao, ​​Bharath Ram Sundar, and ​​Ramanathan Muthuganapathy

        Presentation Time: 10:45 - 11:10

SMI-B-2   "​​On Visibility and Empty-Region Graphs"
        -​​Sagi Katz and ​​Ayellet A. L. Tal

        Presentation Time: 11:10 - 11:35

SMI-B-3   "​​Fast Mapping and Morphing for Genus-zero Meshes with Cross Spherical Parameterization"
        (Invited C&G paper)
        -Chao Peng and Sabin Timalsena

        Presentation Time: 11:35 - 12:00

SMI ✦   Keynote Speech (1)

Digital Human Teleportation using Deep Learning

Keynote Speaker: Hao Li, CEO of Pinscreen & Professor at USC

The age of immersive technologies will create a growing need for processing detailed visual representations of ourselves as virtual reality (VR) is growing into the next generation platform for online communication. A realistic simulation of our presence in such virtual world is unthinkable without a compelling and directable 3D digitization of ourselves. With the wide availability of mobile cameras and the emergence of low-cost VR head mounted displays (HMD), my research goal is to build a comprehensive and deployable teleportation framework for realistic 3D face-to-face communication in cyberspace. By pushing the boundaries in data-driven human digitization as well as bridging concepts in computer graphics and deep learning research, I will showcase several highlights of our current research, from photorealistic avatar creation from a single image, facial performance-sensing head mounted displays, and full-body dynamic shape capture...

Session Chair: Daniele Panozzo, NYU

SMI C   Paper Presentations

​Interactive Modeling

Session Chair: Jarek Rossignac, Georgia Tech

SMI-C-1   "​​Height Field Construction Using Cross Contours"
        -​​Tuan M. Bui, Junho Kim, and Yunjin Lee

        Presentation Time: 15:20 - 15:45

SMI-C-2   "​​Interactive Modeling of Smooth Manifold Meshes with Arbitrary Topology: G1 Stitched Bi-cubic Bézier Patches"
        -​​Ergun Akleman, Vinod Srinivasan, and Jianer Chen

        Presentation Time: 15:45 - 16:10

SMI-C-3   "​​Shape from Sensors: Curve Networks on Surfaces from 3D Orientations"
        -​Tibor Stanko, Stefanie Hahmann, Georges-Pierre Bonneau, and Nathalie Saguin-Sprynski

        Presentation Time: 16:10 - 16:35

FASE   Paper Presentations

Fabrication and Sculpting

Session Chair: Ergun Akleman, Texas A&M

FASE-F-1   "​​Reconfigurable Kinetic Polygons: An Approach to Design 2D Kinetic Tessellations"
        -​Negar Kalantar and Alireza Borhani

        Presentation Time: 16:45 - 17:00

FASE-F-2   "​​3D Modelling Seashells"
        -​​Francesco De Comité

        Presentation Time: 17:00 - 17:15

FASE-F-3   "​​Fabricating Functionally Graded Material Objects Using Trimmed Trivariate Volumetric Representations"
        -​​Ben Ezair, ​​Daniel Dikovsky, and ​​Gershon Elber

        Presentation Time: 17:15 - 17:30

FASE-F-4   "​​Transformative Formworks: Toward Mass Customization of Double-curved Surfaces"
        -​Alireza Borhani and Negar Kalantar

        Presentation Time: 17:30 - 17:45

SMI D   Paper Presentations

​​Shape Analysis

Session Chair: Ayellet A. L. Tal, Technion

SMI-D-1   "​A Multi-view Recurrent Neural Network for 3D Mesh Segmentation"
        -​Truc Le, Giang Bui, and Ye Duan

        Presentation Time: 09:00 - 09:25

SMI-D-2   "​​Hierarchical Forman Triangulation: A Multiscale Model for Scalar Field Analysis"
        -​​Federico Iuricich and Leila De Floriani

        Presentation Time: 09:25 - 09:50

SMI-D-3   "​Hole Detection in a Planar Point Set: An Empty Disk Approach"
        -Subhasree Methirumangalath, Shyam Sundar Kannan, Amal Dev Parakkat, and Ramanathan Muthuganapathy

        Presentation Time: 09:50 - 10:15

SMI E   Paper Presentations

​​​Meshes and Trusses for Fabrication

Session Chair: Mario Botsch, Bielefeld Univ.

SMI-E-1   "​​​Unsharp Masking Geometry Improves 3D Prints"
        -​Philipp Herholz, Sebastian Koch, Tamy Boubekeur, and Marc Alexa

        Presentation Time: 10:45 - 11:10

SMI-E-2   "​​​Epsilon-maps: Characterizing, Detecting and Thickening Thin Features in Geometric Models"
        -​​​Daniela Cabiddu and Marco Attene

        Presentation Time: 11:10 - 11:35

SMI-E-3   "​​​Support-free Frame Structures"
        -​​​Weiming Wang, ​​​Sicheng Qian, ​​​Liping Lin, ​​​Baojun Li, ​​​Bocai Yin, ​​​Ligang Liu, and ​​​Xiuping Liu

        Presentation Time: 11:35 - 12:00

SMI ✦   Keynote Speech (2)

Restricted Constrained Delaunay Triangulations

Keynote Speaker: Jonathan R. Shewchuk, Professor at UC Berkeley

Surface meshes are used extensively in computer graphics, boundary element methods, and many other applications. Researchers have sought surface triangulations that have formal mathematical properties similar to those enjoyed by Delaunay triangulations in the plane. They succeeded by inventing the "restricted Delaunay triangulation," which is a subcomplex of the three-dimensional Delaunay triangulation. In other words, given a smooth surface embedded in three-dimensional space, we compute a set of points lying on the surface, we compute the 3D Delaunay triangulation of those points, and we select a subset of its triangles to serve as a triangulation of the surface. This subset of triangles, the restricted Delaunay triangulation, has proven itself as a mathematically powerful tool for surface meshing and surface reconstruction...

Session Chair: Marco Attene, IMATI-GE/CNR

SMI F   Paper Presentations

​Spatial Subdivisions

Session Chair: Ergun Akleman, Texas A&M

SMI-F-1   "​​​Parallel Quadtree Construction on Collections of Objects"
        -​Nathan Morrical and John Edwards

        Presentation Time: 15:20 - 15:45

SMI-F-2   "A Novel Interpolation Scheme for Dual Marching Cubes on Octree Volume Fraction Data"
        -Kim Seungki, Yutaka Ohtake, Yukie Nagai, and Hiromasa Suzuki

        Presentation Time: 15:45 - 16:10

SMI G   Paper Presentations

​​Fabrication with Lines and Panels

Session Chair: Yutaka Ohtake, RIKEN

SMI-G-1   "​Line Drawing for 3D Printing"
        -​Zhonggui Chen, Zifu Shen, Jianzhi Guo, Cao Juan, and Xiaoming Zeng

        Presentation Time: 16:20 - 16:45

SMI-G-2   "​​​Interlocked Archimedean Spirals for Conversion of Planar Rigid Panels into Locally Flexible Panels with Stiffness Control"
        -​​​Saeid Zarrinmehr, Ergun Akleman, Mahmood Ettehad, Negar Kalantar, Alireza Borhani, and Shinjiro Sueda

        Presentation Time: 16:45 - 17:10

SMI   Best Paper Awards & Business Meeting

​​SMI General Assembly

Session Chair: Marco Attene, IMATI-GE/CNR

​​SMI Best Paper Awards

​​SMI-2018 Announcement

Session Chair: Ye Duan, Univ. of Missouri