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- research-articleApril 2023
Variational Direct Modeling: A Framework Towards Integration of Parametric Modeling and Direct Modeling in CAD
AbstractFeature-based parametric modeling is the de facto standard in CAD. Boundary representation-based direct modeling is another CAD paradigm developed recently. They have complementary advantages and limitations, thereby offering huge ...
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Highlights- Identifying the fundamental research problem and challenges of parametric/direct integration.
- research-articleAugust 2020
Curve guided T-spline skinning for surface and solid generation
Computers and Graphics (CGRS), Volume 90, Issue CAug 2020, Pages 84–94https://doi.org/10.1016/j.cag.2020.05.021Highlights- A T-spline skinning method is developed for high quality surface and solid generation.
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AbstractSkinning is an essential technology in geometric modeling. Unlike non-uniform rational B-spline (NURBS) skinning, T-spline skinning does not require knot compatibility of the given cross-sections, and avoids superfluous of control ...
- research-articleSeptember 2017
Explicit cylindrical maps for general tubular shapes
Computer-Aided Design (CADE), Volume 90, Issue CSep 2017, Pages 27–36https://doi.org/10.1016/j.cad.2017.05.002AbstractA solid cylindrical parameterization is a volumetric map between a tubular shape and a right cylinder embedded in the polar coordinate reference system. This paper introduces a novel approach to derive smooth (i.e., harmonic) ...
Highlights- A method to decompose a tubular shape into a set of topological cylinders.
- A ...
- research-articleOctober 2015
Quality guaranteed all-hex mesh generation by a constrained volume iterative fitting algorithm
Computer-Aided Design (CADE), Volume 67, Issue COctober 2015, Pages 107–117https://doi.org/10.1016/j.cad.2015.05.004The hexahedral mesh (hex mesh) is usually preferred to the tetrahedral mesh (tet mesh) in finite element methods for numerical simulation. In finite element analysis, a valid hex mesh requires that the scaled Jacobian value at each mesh vertex is larger ...
- articleJune 2014
From theoretical graphic objects to real free-form solids
Information Sciences: an International Journal (ISCI), Volume 269June, 2014, Pages 73–93https://doi.org/10.1016/j.ins.2014.01.012Formal models can be useful in computer graphics as a conceptual framework supporting representation systems. This allows to formally derive properties and algorithms and proof their correctness and validity. This paper describes a formal model based on ...
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- articleApril 2014
Feasibility of Training Athletes for High-Pressure Situations Using Virtual Reality
IEEE Transactions on Visualization and Computer Graphics (ITVC), Volume 20, Issue 4April 2014, Pages 606–615https://doi.org/10.1109/TVCG.2014.23Virtual reality (VR) has been successfully applied to a broad range of training domains; however, to date there is little research investigating its benefits for sport psychology training. We hypothesized that using high-fidelity VR systems to display ...
- research-articleApril 2014
Standardizing 3D Medical Imaging
- Young Lae Moon,
- Kazuomi Sugamoto,
- Alberto Paoluzzi,
- Antonio Di Carlo,
- Jaekeun Kwak,
- Dong Sun Shin,
- Dae Ok Kim,
- Dae Hyun Lee,
- Jooyoung Kim
Great progress has been made in standardizing 2D medical images, but the standardization of 3D medical models is still lacking. The first Web extra at http://youtu.be/J_h3Pcono7A is a video in which a shoulder muscle is rendered based on a fresh cadaver ...
- research-articleFebruary 2014
A Whole Surface Approach to Crowd Simulation on Arbitrary Topologies
IEEE Transactions on Visualization and Computer Graphics (ITVC), Volume 20, Issue 2February 2014, Pages 159–171https://doi.org/10.1109/TVCG.2013.110Recent crowd simulation algorithms do path planning on complex surfaces by breaking 3D surfaces into a series of 2.5D planes. This allows for path planning on surfaces that can be mapped from 3D to 2D without distortion, such as multistory buildings. ...
- articleJanuary 2014
Technical note: Linear algebraic representation for topological structures
Computer-Aided Design (CADE), Volume 46January, 2014, Pages 269–274https://doi.org/10.1016/j.cad.2013.08.044With increased complexity of geometric data, topological models play an increasingly important role beyond boundary representations, assemblies, finite elements, image processing, and other traditional modeling applications. While many graph- and index-...
- articleNovember 2013
Fabricating 3D Figurines with Personalized Faces
IEEE Computer Graphics and Applications (ICGA), Volume 33, Issue 6November 2013, Pages 36–46https://doi.org/10.1109/MCG.2013.83We present a semi-automated system for fabricating figurines with faces that are personalised to the individual likeness of the customer. The efficacy of the system has been demonstrated by commercial deployments at Walt Disney World Resort and Star ...
- articleNovember 2013
3D-Printing Spatially Varying BRDFs
IEEE Computer Graphics and Applications (ICGA), Volume 33, Issue 6November 2013, Pages 48–57https://doi.org/10.1109/MCG.2013.82A new method fabricates custom surface reflectance and spatially varying bidirectional reflectance distribution functions (svBRDFs). Researchers optimize a microgeometry for a range of normal distribution functions and simulate the resulting surface's ...
- articleSeptember 2013
Wetting of Porous Solids
IEEE Transactions on Visualization and Computer Graphics (ITVC), Volume 19, Issue 9September 2013, Pages 1592–1604https://doi.org/10.1109/TVCG.2013.8This paper presents a simple, three stage method to simulate the mechanics of wetting of porous solid objects, like sponges and cloth, when they interact with a fluid. In the first stage, we model the absorption of fluid by the object when it comes in ...
- articleSeptember 2013
Surface Mesh to Volumetric Spline Conversion with Generalized Polycubes
IEEE Transactions on Visualization and Computer Graphics (ITVC), Volume 19, Issue 9September 2013, Pages 1539–1551https://doi.org/10.1109/TVCG.2012.177This paper develops a novel volumetric parameterization and spline construction framework, which is an effective modeling tool for converting surface meshes to volumetric splines. Our new splines are defined upon a novel parametric domain called ...
- articleSeptember 2013
Calibration of Smooth Camera Models
IEEE Transactions on Pattern Analysis and Machine Intelligence (ITPM), Volume 35, Issue 9September 2013, Pages 2091–2103https://doi.org/10.1109/TPAMI.2012.258Generic imaging models can be used to represent any camera. Current generic models are discrete and define a mapping between each pixel in the image and a straight line in 3D space. This paper presents a modification of the generic camera model that ...
- research-articleSeptember 2013
The LiverAnatomyExplorer: A WebGL-Based Surgical Teaching Tool
IEEE Computer Graphics and Applications (ICGA), Volume 33, Issue 5September 2013, Pages 48–58https://doi.org/10.1109/MCG.2013.41The LiverAnatomyExplorer is a real-time surgical teaching tool based on state-of-the-art Web technologies such as SVG (Scalable Vector Graphics), X3D (Extensible3D), and WebGL (Web Graphics Library). Unlike other medical e-learning systems, the ...
- research-articleJuly 2013
Interactive Applications for Sketch-Based Editable Polycube Map
IEEE Transactions on Visualization and Computer Graphics (ITVC), Volume 19, Issue 7July 2013, Pages 1158–1171https://doi.org/10.1109/TVCG.2012.308In this paper, we propose a sketch-based editable polycube mapping method that, given a general mesh and a simple polycube that coarsely resembles the shape of the object, plus sketched features indicating relevant correspondences between the two, ...
- articleJuly 2013
Joint Albedo Estimation and Pose Tracking from Video
IEEE Transactions on Pattern Analysis and Machine Intelligence (ITPM), Volume 35, Issue 7July 2013, Pages 1674–1689https://doi.org/10.1109/TPAMI.2012.249The albedo of a Lambertian object is a surface property that contributes to an object's appearance under changing illumination. As a signature independent of illumination, the albedo is useful for object recognition. Single image-based albedo estimation ...
- articleJuly 2013
Garment Personalization via Identity Transfer
IEEE Computer Graphics and Applications (ICGA), Volume 33, Issue 4July 2013, Pages 62–72https://doi.org/10.1109/MCG.2012.90A new system provides a virtual experience akin to trying on clothing. It clones the user's photographic image into a catalog of images of models wearing the desired garments. Simple offline training extracts the user's head. Segmentation accurately ...
- articleJuly 2013
Extracting Valley-Ridge Lines from Point-Cloud-Based 3D Fingerprint Models
IEEE Computer Graphics and Applications (ICGA), Volume 33, Issue 4July 2013, Pages 73–81https://doi.org/10.1109/MCG.2012.1283D fingerprinting is an emerging technology with the distinct advantage of touchless operation. More important, 3D fingerprint models contain more biometric information than traditional 2D fingerprint images. However, current approaches to fingerprint ...
- articleJune 2013
A Divide-and-Conquer Approach to Quad Remeshing
IEEE Transactions on Visualization and Computer Graphics (ITVC), Volume 19, Issue 6June 2013, Pages 941–952https://doi.org/10.1109/TVCG.2012.301Many natural and man-made objects consist of simple primitives, similar components, and various symmetry structures. This paper presents a divide-and-conquer quadrangulation approach that exploits such global structural information. Given a model ...