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Displaying 1-47 out of 47 total
Variational Blue Noise Sampling
Found in: IEEE Transactions on Visualization and Computer Graphics
By Zhonggui Chen,Zhan Yuan,Yi-King Choi,Ligang Liu,Wenping Wang
Issue Date:October 2012
pp. 1784-1796
Blue noise point sampling is one of the core algorithms in computer graphics. In this paper, we present a new and versatile variational framework for generating point distributions with high-quality blue noise characteristics while precisely adapting to gi...
 
Minimizing the Number of Separating Circles for Two Sets of Points in the Plane
Found in: International Symposium on Voronoi Diagrams in Science and Engineering
By Jiaye Wang, Feng Sun, Wenping Wang, Chunyan Miao, Caiming Zhang
Issue Date:June 2011
pp. 98-104
Given two sets of points $\mathbb{R}$ and $\mathbb{B}$ in the plane, we address the problem of finding a set of circles $\mathbb{C} = \{c_i, i= 1, 2, \ldots, k\}$, satisfying the condition that every point in $\mathbb{R}$ is covered by at least one circle ...
 
Rod-Like Trabeculae Extraction from Cancellous Bone Microstructure using Topological Analysis
Found in: Computer Aided Design and Computer Graphics, International Conference on
By Xiaoting Wang, Y.K. Choi, Wenping Wang, W.W. Lu
Issue Date:December 2005
pp. 173-180
The study of the microstructure in cancellous bone is important in osteoporosis research. In this paper, we focus in the extraction of rod-like trabeculae in cancellous bone, whose topological and geometrical properties are known to be strongly related to ...
 
Efficient Example-Based Painting and Synthesis of 2D Directional Texture
Found in: IEEE Transactions on Visualization and Computer Graphics
By Bin Wang, Wenping Wang, Huaiping Yang, Jiaguang Sun
Issue Date:May 2004
pp. 266-277
<p><b>Abstract</b>—We present a new method for converting a photo or image to a synthesized painting following the painting style of an example painting. Treating painting styles of brush strokes as sample textures, we reduce the problem ...
 
Visibility-Based Coverage of Mobile Sensors in Non-convex Domains
Found in: International Symposium on Voronoi Diagrams in Science and Engineering
By Lin Lu, Yi-King Choi, Wenping Wang
Issue Date:June 2011
pp. 105-111
The area coverage problem of mobile sensor networks has attracted much attention recently, as mobile sensors find many important applications in remote and hostile environments. However, the deployment of mobile sensors in a non-convex domain is nontrivial...
 
Computation and properties of Centroidal Voronoi Tessellation
Found in: Shape Modeling and Applications, International Conference on
By Wenping Wang
Issue Date:June 2008
pp. xi
Centroidal Voronoi Tessellation (CVT) is a variational framework of computing an optimal geometric structure based on the Voronoi Diagram, and is used in many applications of computer graphics and geometric processing. I will present several recent results...
   
Continuous Collision Detection for Ellipsoids
Found in: IEEE Transactions on Visualization and Computer Graphics
By Yi-King Choi, Jung-Woo Chang, Wenping Wang, Myung-Soo Kim, Gershon Elber
Issue Date:March 2009
pp. 311-325
We present an accurate and efficient algorithm for continuous collision detection between two moving ellipsoids. We start with a highly optimized implementation of interference testing between two stationary ellipsoids based on an algebraic condition descr...
 
Design and Analysis of Optimization Methods for Subdivision Surface Fitting
Found in: IEEE Transactions on Visualization and Computer Graphics
By Kin-Shing Cheng, Wenping Wang, Hong Qin, Kwan-Yee Wong, Huaiping Yang, Yang Liu
Issue Date:September 2007
pp. 878-890
We present a complete framework for computing a subdivision surface to approximate unorganized point sample data, which is a separable nonlinear least squares problem. We study the convergence and stability of three geometrically-motivated optimization sch...
 
Reconstructing B-spline Curves from Point Clouds--A Tangential Flow Approach Using Least Squares Minimization
Found in: Shape Modeling and Applications, International Conference on
By Yang Liu, Huaiping Yang, Wenping Wang
Issue Date:June 2005
pp. 4-12
We present a novel algorithm based on least-squares minimization to approximate point cloud data in 2D plane with a smooth B-spline curve. The point cloud data may represent an open curve with self intersection and sharp corner. Unlike other existing metho...
 
Fitting Subdivision Surfaces to Unorganized Point Data Using SDM
Found in: Computer Graphics and Applications, Pacific Conference on
By Kin-Shing D. Cheng, Wenping Wang, Hong Qin, Kwan-Yee K. Wong, Huaiping Yang, Yang Liu
Issue Date:October 2004
pp. 16-24
We study the reconstruction of smooth surfaces from point clouds. We use a new squared distance error term in optimization to fit a subdivision surface to a set of unorganized points, which defines a closed target surface of arbitrary topology. The resulti...
 
Occlusion Culling Using Minimum Occluder Set and Opacity Map
Found in: Information Visualisation, International Conference on
By Poon Chun Ho, Wenping Wang
Issue Date:July 1999
pp. 292
The aim of occlusion culling is to cull away a significant amount of invisible primitives at different viewpoints. We present two algorithms to improve occlusion culling for a highly occluded virtual environment. The first algorithm is used in pre-processi...
 
Effective Weighted Compressive Tracking
Found in: 2013 Seventh International Conference on Image and Graphics (ICIG)
By Wenping Wang,Yan Xu,Yuanquan Wang,Baofeng Zhang,Zuoliang Cao
Issue Date:July 2013
pp. 353-357
Compressive Tracking (CT) model is a recently proposed method for visual tracking, in which the appearance model is constructed from the features selected from the multiscale image feature space based on compressive sensing. The CT tracker has been proven ...
 
On the efficacy of input Vector Control to mitigate NBTI effects and leakage power
Found in: Quality Electronic Design, International Symposium on
By Yu Wang, Xiaoming Chen, Wenping Wang, Varsha Balakrishnan, Yu Cao, Yuan Xie, Huazhong Yang
Issue Date:March 2009
pp. 19-26
As technology scales, the aging effect caused by Negative Bias Temperature Instability (NBTI) has become a major reliability concerns for circuit designers. Consequently, we have seen a lot of research efforts on NBTI analysis and mitigation techniques. On...
 
Silhouette Smoothing for Real-Time Rendering of Mesh Surfaces
Found in: IEEE Transactions on Visualization and Computer Graphics
By Lu Wang, Changhe Tu, Wenping Wang, Xiangxu Meng, Bin Chan, Dongming Yan
Issue Date:May 2008
pp. 640-652
Coarse piecewise linear approximation of surfaces causes undesirable polygonal appearance of silhouettes. We present an efficient method for smoothing the silhouettes of coarse triangle meshes using efficient 3D curve reconstruction and simple local re-mes...
 
Classifying the Nonsingular Intersection Curve of Two Quadric Surfaces
Found in: Geometric Modeling and Processing
By Changhe Tu, Wenping Wang, Jiaye Wang
Issue Date:July 2002
pp. 23
We present new results on classifying the morphology of the nonsingular intersection curve of two quadrics by studying the roots of the characteristic equation, or the discriminant, of the pencil spanned by the two quadrics. The morphology of a nonsingular...
 
Global Optimization of Centroidal Voronoi Tessellation with Monte Carlo Approach
Found in: IEEE Transactions on Visualization and Computer Graphics
By Lin Lu, Feng Sun, Hao Pan, Wenping Wang
Issue Date:November 2012
pp. 1880-1890
Centroidal Voronoi Tessellation (CVT) is a widely used geometric structure in applications including mesh generation, vector quantization and image processing. Global optimization of the CVT function is important in these applications. With numerical evide...
 
Generalized Voronoi Diagram Computation on GPU
Found in: International Symposium on Voronoi Diagrams in Science and Engineering
By Zhan Yuan, Guodong Rong, Xiaohu Guo, Wenping Wang
Issue Date:June 2011
pp. 75-82
We study the problem of using the GPU to compute the generalized Voronoi diagram (GVD) for higher-order sites, such as line segments and curves. This problem has applications in many fields, including computer animation, pattern recognition and so on. A nu...
 
GPU-Assisted Computation of Centroidal Voronoi Tessellation
Found in: IEEE Transactions on Visualization and Computer Graphics
By Guodong Rong, Yang Liu, Wenping Wang, Xiaotian Yin, Xianfeng David Gu, Xiaohu Guo
Issue Date:March 2011
pp. 345-356
Centroidal Voronoi tessellations (CVT) are widely used in computational science and engineering. The most commonly used method is Lloyd's method, and recently the L-BFGS method is shown to be faster than Lloyd's method for computing the CVT. However, these...
 
Node Criticality Computation for Circuit Timing Analysis and Optimization under NBTI Effect
Found in: Quality Electronic Design, International Symposium on
By Wenping Wang, Shengqi Yang, Yu Cao
Issue Date:March 2008
pp. 763-768
For sub-65nm technology nodes, Negative Bias Temperature Instability (NBTI) has become a primary limiting factor of circuit lifetime. During the past few years, researchers have spent considerable and continuous efforts on modeling and characterization of ...
 
Accurate Stacking Effect Macro-Modeling of Leakage Power in Sub-100nm Circuits
Found in: VLSI Design, International Conference on
By Shengqi Yang, Wayne Wolf, N. Vijaykrishnan, Yuan Xie, Wenping Wang
Issue Date:January 2005
pp. 165-170
An accurate and efficient stacking effect macro-model for leakage power in sub-100nm circuits is presented in this paper. Leakage power, including subthreshold leakage power and gate leakage power, is becoming more significant compared to dynamic power whe...
 
Computing Distances between Surfaces Using Line Geometry
Found in: Computer Graphics and Applications, Pacific Conference on
By Kyung-Ah Sohn, Bert Jüttler, Myung-Soo Kim, Wenping Wang
Issue Date:October 2002
pp. 236
We present an algorithm for computing the distance between two free-form surfaces. Using line geometry, the distance computation is reformulated as a simple instance of a surface-surface intersection problem, which leads to low-dimensional root finding in ...
 
Representing Spheres and Ellipsoids Using Periodic NURBS Surfaces with Fewer Control Vertices
Found in: Computer Graphics and Applications, Pacific Conference on
By Kaihuai Qin, Zesheng Tang, Wenping Wang
Issue Date:October 1998
pp. 210
A new kind of NURBS representation for periodic curves is introduced. The method for periodic curves is extended to derive a compact and symmetric representation of the sphere or the ellipsoid using a piecewise bi-quadratic NURBS surface with only eight di...
 
Probabilistic Segmentation of Volume Data for Visualization Using SOM-PNN Classifier
Found in: Volume Visualization and Graphics, IEEE Symposium on
By Shaowei Xia, Wai Wan Tsang, Wenping Wang, Xin Tong, Zesheng Tang, Feng Ma
Issue Date:October 1998
pp. 71-78
We present a new probablistic classifier, called SOM-PNN classifier, for volume data classification and visualization. The new classifier produces probablistic classification with Bayesian confidence measure which is highly desirable in volume rendering. B...
 
Towards Photo Watercolorization with Artistic Verisimilitude
Found in: IEEE Transactions on Visualization and Computer Graphics
By Miaoyi Wang,Bin Wang,Yun Fei,Kanglai Qian,Wenping Wang,Jiating Chen,Jun-Hai Yong
Issue Date:February 2014
pp. 1
We present a novel artistic-verisimilitude driven system for watercolor rendering of images and photos. Our system achieves realistic simulation of a set of important characteristics of watercolor paintings that have not been well implemented before. Speci...
 
Planar Hexagonal Meshing for Architecture
Found in: IEEE Transactions on Visualization and Computer Graphics
By Yufei Li,Yang Liu,Wenping Wang
Issue Date:July 2014
pp. 1
Mesh surfaces with planar hexagonal faces, what we refer to as PH meshes, offer an elegant way of paneling freeform architectural surfaces due to their node simplicity (i.e. valence-3 nodes) and naturally appealing layout. We investigate PH meshes to under...
 
Optimized Synthesis of Art Patterns and Layered Textures
Found in: IEEE Transactions on Visualization and Computer Graphics
By Ruobing Wu, Wenping Wang, Yizhou Yu
Issue Date:March 2014
pp. 436-446
Line drawings and digital arts appear everywhere, from simple icons and logos to cartoons, maps, and illustrations. We define art patterns as the subset of line drawings and digital arts that are comprised of repeated elements. There exist textures that sh...
 
Content-Aware Photo Collage Using Circle Packing
Found in: IEEE Transactions on Visualization and Computer Graphics
By Zongqiao Yu, Lin Lu, Yanwen Guo, Rongfei Fan, Mingming Liu, Wenping Wang
Issue Date:February 2014
pp. 182-195
In this paper, we present a novel approach for automatically creating the photo collage that assembles the interest regions of a given group of images naturally. Previous methods on photo collage are generally built upon a well-defined optimization framewo...
 
SCaLE: Supervised and Cascaded Laplacian Eigenmaps for Visual Object Recognition Based on Nearest Neighbors
Found in: 2013 IEEE Conference on Computer Vision and Pattern Recognition (CVPR)
By Ruobing Wu,Yizhou Yu,Wenping Wang
Issue Date:June 2013
pp. 867-874
Recognizing the category of a visual object remains a challenging computer vision problem. In this paper we develop a novel deep learning method that facilitates example-based visual object category recognition. Our deep learning architecture consists of m...
 
Bilateral blue noise sampling
Found in: ACM Transactions on Graphics (TOG)
By Huamin Wang, Jun-Hai Yong, Li-Yi Wei, Wenping Wang, Yun Fei, Bin Wang, Jiating Chen, Kang-Lai Qian, Xiaoyin Ge, Yusu Wang
Issue Date:November 2013
pp. 1-11
Blue noise sampling is an important component in many graphics applications, but existing techniques consider mainly the spatial positions of samples, making them less effective when handling problems with non-spatial features. Examples include biological ...
     
Example-based art pattern synthesis using level sets
Found in: SIGGRAPH Asia 2013 Technical Briefs (SA '13)
By Ruobing Wu, Wenping Wang, Yizhou Yu
Issue Date:November 2013
pp. 1-4
Line drawings and digital arts appear everywhere, from simple icons to cartoons, maps and illustrations. We define art patterns as the subset of line drawings and digital arts that are comprised of repeated elements. Inspired by recent success of exemplar-...
     
A compact random-access representation for urban modeling and rendering
Found in: ACM Transactions on Graphics (TOG)
By Wenping Wang, Bin Chan, Yizhou Yu, Zhengzheng Kuang
Issue Date:November 2013
pp. 1-12
We propose a highly memory-efficient representation for modeling and rendering urban buildings composed predominantly of rectangular block structures, which can be used to completely or partially represent most modern buildings. With the proposed represent...
     
NBTI-aware circuit node criticality computation
Found in: ACM Journal on Emerging Technologies in Computing Systems (JETC)
By Mark Hagan, Pallav Gupta, Shengqi Yang, Wei Zhang, Wenping Wang, Yu Cao
Issue Date:September 2013
pp. 1-19
For sub-65nm technology nodes, Negative Bias Temperature Instability (NBTI) has become a primary limiting factor of circuit lifetime. During the past few years, researchers have spent considerable effort on accurate modeling and characterization of circuit...
     
Particle-based anisotropic surface meshing
Found in: ACM Transactions on Graphics (TOG)
By Bruno Lévy, Feng Sun, Weihua Mao, Wenping Wang, Xiaohu Guo, Yang Liu, Zichun Zhong
Issue Date:July 2013
pp. 1-14
This paper introduces a particle-based approach for anisotropic surface meshing. Given an input polygonal mesh endowed with a Riemannian metric and a specified number of vertices, the method generates a metric-adapted mesh. The main idea consists of mappin...
     
Computing self-supporting surfaces by regular triangulation
Found in: ACM Transactions on Graphics (TOG)
By Baining Guo, Hao Pan, John Snyder, Wenping Wang, Yang Liu
Issue Date:July 2013
pp. 1-10
Masonry structures must be compressively self-supporting; designing such surfaces forms an important topic in architecture as well as a challenging problem in geometric modeling. Under certain conditions, a surjective mapping exists between a power diagram...
     
All-hex meshing using singularity-restricted field
Found in: ACM Transactions on Graphics (TOG)
By Baining Guo, Weiwei Xu, Wenping Wang, Yang Liu, Yufei Li
Issue Date:November 2012
pp. 1-11
Decomposing a volume into high-quality hexahedral cells is a challenging task in geometric modeling and computational geometry. Inspired by the use of cross field in quad meshing and the CubeCover approach in hex meshing, we present a complete all-hex mesh...
     
Object-space multiphase implicit functions
Found in: ACM Transactions on Graphics (TOG)
By Wenping Wang, Yizhou Yu, Zhan Yuan
Issue Date:July 2012
pp. 1-10
Implicit functions have a wide range of applications in entertainment, engineering and medical imaging. A standard two-phase implicit function only represents the interior and exterior of a single object. To facilitate solid modeling of heterogeneous objec...
     
Robust modeling of constant mean curvature surfaces
Found in: ACM Transactions on Graphics (TOG)
By Caiming Zhang, Hao Pan, Konrad Polthier, Qiang Du, Wenchao Hu, Wenping Wang, Yang Liu, Yi-King Choi
Issue Date:July 2012
pp. 1-11
We present a new method for modeling discrete constant mean curvature (CMC) surfaces, which arise frequently in nature and are highly demanded in architecture and other engineering applications. Our method is based on a novel use of the CVT (centroidal Vor...
     
Circular arc structures
Found in: ACM SIGGRAPH 2011 papers (SIGGRAPH '11)
By Helmut Pottmann, Johannes Wallner, Martin Kilian, Pengbo Bo, Wenping Wang
Issue Date:August 2011
pp. 287-294
The most important guiding principle in computational methods for freeform architecture is the balance between cost efficiency on the one hand, and adherence to the design intent on the other. Key issues are the simplicity of supporting and connecting elem...
     
Circular arc structures
Found in: ACM Transactions on Graphics (TOG)
By Helmut Pottmann, Johannes Wallner, Martin Kilian, Pengbo Bo, Wenping Wang
Issue Date:July 2011
pp. 1-33
The most important guiding principle in computational methods for freeform architecture is the balance between cost efficiency on the one hand, and adherence to the design intent on the other. Key issues are the simplicity of supporting and connecting elem...
     
Freeform surfaces from single curved panels
Found in: ACM Transactions on Graphics (TOG)
By Alexander Schiftner, Heinz Schmiedhofer, Helmut Pottmann, Johannes Wallner, Niccolo Baldassini, Pengbo Bo, Wenping Wang
Issue Date:August 2008
pp. 1-49
Motivated by applications in architecture and manufacturing, we discuss the problem of covering a freeform surface by single curved panels. This leads to the new concept of semi-discrete surface representation, which constitutes a link between smooth and d...
     
Geometry of multi-layer freeform structures for architecture
Found in: ACM Transactions on Graphics (TOG)
By Alexander Bobenko, Helmut Pottmann, Johannes Wallner, Wenping Wang, Yang Liu
Issue Date:July 2007
pp. 1-35
The geometric challenges in the architectural design of freeform shapes come mainly from the physical realization of beams and nodes. We approach them via the concept of parallel meshes, and present methods of computation and optimization. We discuss plana...
     
The impact of NBTI on the performance of combinational and sequential circuits
Found in: Proceedings of the 44th annual conference on Design automation (DAC '07)
By Frank Liu, Rakesh Vattikonda, Sarma Vrudhula, Sarvesh Bhardwaj, Shengqi Yang, Wenping Wang, Yu Cao
Issue Date:June 2007
pp. 364-369
Negative-bias-temperature-instability (NBTI) has become the primary limiting factor of circuit lifetime. In this work, we develop a general framework for analyzing the impact of NBTI on the performance of a circuit, based on various circuit parameters such...
     
Geometric modeling with conical meshes and developable surfaces: Copyright restrictions prevent ACM from providing the full text for this work.
Found in: ACM SIGGRAPH 2006 Papers (SIGGRAPH '06)
By Helmut Pottmann, Johannes Wallner, Wenping Wang, Yang Liu, Yong-Liang Yang
Issue Date:July 2006
pp. 24-es
In architectural freeform design, the relation between shape and fabrication poses new challenges and requires more sophistication from the underlying geometry. The new concept of conical meshes satisfies central requirements for this application: They are...
     
Geometric modeling with conical meshes and developable surfaces: Copyright restrictions prevent ACM from providing the full text for this work.
Found in: Material presented at the ACM SIGGRAPH 2006 conference (SIGGRAPH '06)
By Helmut Pottmann, Johannes Wallner, Wenping Wang, Yang Liu, Yong-Liang Yang
Issue Date:July 2006
pp. 24-es
In architectural freeform design, the relation between shape and fabrication poses new challenges and requires more sophistication from the underlying geometry. The new concept of conical meshes satisfies central requirements for this application: They are...
     
Modeling and minimization of PMOS NBTI effect for robust nanometer design
Found in: Proceedings of the 43rd annual conference on Design automation (DAC '06)
By Rakesh Vattikonda, Wenping Wang, Yu Cao
Issue Date:July 2006
pp. 1047-1052
Negative bias temperature instability (NBTI) has become the dominant reliability concern for nanoscale PMOS transistors. In this paper, a predictive model is developed for the degradation of NBTI in both static and dynamic operations. Model scalability and...
     
Fitting B-spline curves to point clouds by curvature-based squared distance minimization
Found in: ACM Transactions on Graphics (TOG)
By Helmut Pottmann, Wenping Wang, Yang Liu
Issue Date:April 2006
pp. 214-238
Computing a curve to approximate data points is a problem encountered frequently in many applications in computer graphics, computer vision, CAD/CAM, and image processing. We present a novel and efficient method, called squared distance minimization (SDM),...
     
Probabilistic segmentation of volume data for visualization using SOM-PNN classifier
Found in: Proceedings of the 1998 IEEE symposium on Volume visualization (VVS '98)
By Feng Ma, Shaowei Xia, Wai Wan Tsang, Wenping Wang, Xin Tong, Zesheng Tang
Issue Date:October 1998
pp. 71-78
From the Coliseum in Rome to the verdant landscape of the Loire Valley, the world's cultural heritage has withstood the text of time. Today though, the pace of progress --- from urban sprawl to pollution, neglect, conflict, and even tourism --- threatens t...
     
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