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Displaying 1-39 out of 39 total
K-set tilable surfaces
Found in: ACM Transactions on Graphics (TOG)
By Chi-Fu Lai, Chi-Wing Fu, Daniel Cohen-Or, Ying He, Chi-Fu Lai, Chi-Wing Fu, Daniel Cohen-Or, Ying He, Chi-Fu Lai, Chi-Wing Fu, Daniel Cohen-Or, Ying He, Chi-Fu Lai, Chi-Wing Fu, Daniel Cohen-Or, Ying He
Issue Date:July 2010
pp. 1-10
This paper introduces a method for optimizing the tiles of a quad-mesh. Given a quad-based surface, the goal is to generate a set of K quads whose instances can produce a tiled surface that approximates the input surface. A solution to the problem is a K-s...
     
Visual Signature of High-Dimensional Geometry in Parallel Coordinates
Found in: 2014 IEEE Pacific Visualization Symposium (PacificVis)
By Xiaoqi Yan, Chi Fu Lai, Chi Wing Fu
Issue Date:March 2014
pp. 65-72
Although we can interactively rotate a 3D projected high-dimensional geometry and observe its dynamic changes, this traditional visualization method is limited and highly sensitive to the choice of viewing direction. Parallel-coordinates plots supplement t...
 
Binary-Space-Partitioned Images for Resolving Image-Based Visibility
Found in: IEEE Transactions on Visualization and Computer Graphics
By Chi-Wing Fu, Tien-Tsin Wong, Wai-Shun Tong, Chi-Keung Tang, Andrew J. Hanson
Issue Date:January 2004
pp. 58-71
<p><b>Abstract</b>-We propose a novel 2D representation for 3D visibility sorting, the <it>Binary-Space-Partitioned Image (BSPI)</it>, to accelerate real-time image-based rendering. BSPI is an efficient 2D realization of a 3D ...
 
Interactive Visualization of Hyperspectral Images of Historical Documents
Found in: IEEE Transactions on Visualization and Computer Graphics
By Seon Joo Kim, Shaojie Zhuo, Fanbo Deng, Chi-Wing Fu, Michael Brown
Issue Date:November 2010
pp. 1441-1448
This paper presents an interactive visualization tool to study and analyze hyperspectral images (HSI) of historical documents. This work is part of a collaborative effort with the Nationaal Archief of the Netherlands (NAN) and Art Innovation, a manufacture...
 
GL4D: A GPU-based Architecture for Interactive 4D Visualization
Found in: IEEE Transactions on Visualization and Computer Graphics
By Alan Chu, Chi-Wing Fu, Andrew Hanson, Pheng-Ann Heng
Issue Date:November 2009
pp. 1587-1594
This paper describes GL4D, an interactive system for visualizing 2-manifolds and 3-manifolds embedded in four Euclidean dimensions and illuminated by 4D light sources. It is a tetrahedron-based rendering pipeline that projects geometry into volume images, ...
 
Visualizing Multiwavelength Astrophysical Data
Found in: IEEE Transactions on Visualization and Computer Graphics
By Hongwei Li, Chi-Wing Fu, Andrew Hanson
Issue Date:November 2008
pp. 1555-1562
With recent advances in the measurement technology for allsky astrophysical imaging, our view of the sky is no longer limited to the tiny visible spectral range over the 2D Celestial sphere. We now can access a third dimension corresponding to a broad elec...
 
Visualizing Large-Scale Uncertainty in Astrophysical Data
Found in: IEEE Transactions on Visualization and Computer Graphics
By Hongwei Li, Chi-Wing Fu, Yinggang Li, Andrew Hanson
Issue Date:November 2007
pp. 1640-1647
Visualization of uncertainty or error in astrophysical data is seldom available in simulations of astronomical phenomena, and yet almost all rendered attributes possess some degree of uncertainty due to observational error. Uncertainties associated with sp...
 
Multitouching the Fourth Dimension
Found in: Computer
By Xiaoqi Yan,Chi-Wing Fu,Andrew J. Hanson
Issue Date:September 2012
pp. 80-88
The increased degrees of freedom in a multitouch interface help users control 4D worlds with intuitive gestures. Relative to a specialized mouse-based interface, a multitouch interface is easier to learn, and 4D object manipulation is up to 1.5 times faste...
 
A Progressive Structural Analysis Approach for Handwritten Chemical Formula Recognition
Found in: 2013 12th International Conference on Document Analysis and Recognition (ICDAR)
By Peng Tang,Siu Cheung Hui,Chi-Wing Fu
Issue Date:August 2013
pp. 359-363
With the recent emergence of pen-based and touch based input devices such as Apple's iPad and Samsung's Galaxy Tablet, it has become more feasible now to input chemical formulas directly by handwriting, which is more natural and efficient than the traditio...
 
Double-Sided 2.5D Graphics
Found in: IEEE Transactions on Visualization and Computer Graphics
By Chih-Kuo Yeh, Peng Song, Peng-Yen Lin, Chi-Wing Fu, Chao-Hung Lin, Tong-Yee Lee
Issue Date:February 2013
pp. 225-235
This paper introduces double-sided 2.5D graphics, aiming at enriching the visual appearance when manipulating conventional 2D graphical objects in 2.5D worlds. By attaching a back texture image on a single-sided 2D graphical object, we can enrich the surfa...
 
Statistical Invariance for Texture Synthesis
Found in: IEEE Transactions on Visualization and Computer Graphics
By Xiaopei Liu, Lei Jiang, Tien-Tsin Wong, Chi-Wing Fu
Issue Date:November 2012
pp. 1836-1848
Estimating illumination and deformation fields on textures is essential for both analysis and application purposes. Traditional methods for such estimation usually require complicated and sometimes labor-intensive processing. In this paper, we propose a ne...
 
Efficiently Computing Exact Geodesic Loops within Finite Steps
Found in: IEEE Transactions on Visualization and Computer Graphics
By Shi-Qing Xin,Ying He,Chi-Wing Fu
Issue Date:June 2012
pp. 879-889
Closed geodesics, or geodesic loops, are crucial to the study of differential topology and differential geometry. Although the existence and properties of closed geodesics on smooth surfaces have been widely studied in mathematics community, relatively lit...
 
Dual Poisson-Disk Tiling: An Efficient Method for Distributing Features on Arbitrary Surfaces
Found in: IEEE Transactions on Visualization and Computer Graphics
By Hongwei Li, Kui-Yip Lo, Man-Kang Leung, Chi-Wing Fu
Issue Date:September 2008
pp. 982-998
This paper introduces a novel surface-modeling method to stochastically distribute features on arbitrary topological surfaces. The generated distribution of features follows the Poisson disk distribution, so we can have a minimum separation guarantee betwe...
 
Interactive Reaction-Diffusion on Surface Tiles
Found in: Computer Graphics and Applications, Pacific Conference on
By Kui-Yip Lo, Hongwei Li, Chi-Wing Fu, Tien-Tsin Wong
Issue Date:November 2007
pp. 65-74
This paper proposes to perform reaction-diffusion on surface tiles. The square tiles fit nicely and cost-effectively in GPU memory, whereas we also apply distortion minimization on tiles so as to precisely reduce the unbalanced scale and resolution problem...
 
Tileable BTF
Found in: IEEE Transactions on Visualization and Computer Graphics
By Man-Kang Leung, Wai-Man Pang, Chi-Wing Fu, Tien-Tsin Wong, Pheng-Ann Heng
Issue Date:September 2007
pp. 953-965
This paper presents a modular framework to efficiently apply the bidirectional texture functions (BTF) onto object surfaces. The basic building blocks are the BTF tiles. By constructing one set of BTF tiles, a wide variety of objects can be textured seamle...
 
A Transparently Scalable Visualization Architecture for Exploring the Universe
Found in: IEEE Transactions on Visualization and Computer Graphics
By Chi-Wing Fu, Andrew J. Hanson
Issue Date:January 2007
pp. 108-121
<p><b>Abstract</b>—Modern astronomical instruments produce enormous amounts of three-dimensional data describing the physical Universe. The currently available data sets range from the solar system to nearby stars and portions of the Milk...
 
Interactive Relighting of Panoramas
Found in: IEEE Computer Graphics and Applications
By Tien-Tsin Wong, Pheng-Ann Heng, Chi-Wing Fu
Issue Date:March 2001
pp. 32-41
Due to the simplicity and efficiency of panoramic image representation, it has been successfully applied to Internet applications to provide an immersive illusion within a real or synthetic environment. However, once a scene has been captured as an image, ...
 
Anisotropic blue noise sampling
Found in: ACM Transactions on Graphics (TOG)
By Chi-Wing Fu, Hongwei Li, Li-Yi Wei, Pedro V. Sander, Chi-Wing Fu, Hongwei Li, Li-Yi Wei, Pedro V. Sander
Issue Date:December 2010
pp. 1-12
Blue noise sampling is widely employed for a variety of imaging, geometry, and rendering applications. However, existing research so far has focused mainly on isotropic sampling, and challenges remain for the anisotropic scenario both in sample generation ...
     
3D polyomino puzzle
Found in: ACM Transactions on Graphics (TOG)
By Chi-Wing Fu, Hongwei Li, Kui-Yip Lo, Chi-Wing Fu, Hongwei Li, Kui-Yip Lo
Issue Date:December 2009
pp. 1-2
This paper presents a computer-aided geometric design approach to realize a new genre of 3D puzzle, namely the 3D Polyomino puzzle. We base our puzzle pieces on the family of 2D shapes known as polyominoes in recreational mathematics, and construct the 3D ...
     
Visualizing Mobility of Public Transportation System
Found in: IEEE Transactions on Visualization and Computer Graphics
By Wei Zeng,Chi-Wing Fu,Stefan Arisona,Alexander Erath,Huamin Qu
Issue Date:February 2015
pp. 1
Public transportation systems (PTSs) play an important role in modern cities, providing shared/massive transportation services that are essential for the general public. However, due to their increasing complexity, designing effective methods to visualize ...
 
2.5D Cartoon Hair Modeling and Manipulation
Found in: IEEE Transactions on Visualization and Computer Graphics
By Chih-Kuo Yeh,Pradeep Kumar Jayaraman,Xiaopei Liu,Chi-Wing Fu,Tong-Yee Lee
Issue Date:February 2015
pp. 1
This paper addresses a challenging single-view modeling and animation problem with cartoon images. Our goal is to model the hairs in a given cartoon image with consistent layering and occlusion, so that we can produce various visual effects from just a sin...
 
Turbulence Simulation by Adaptive Multi-Relaxation Lattice Boltzmann Modeling
Found in: IEEE Transactions on Visualization and Computer Graphics
By Xiaopei Liu, Wai-Man Pang, Jing Qin, Chi-Wing Fu
Issue Date:February 2014
pp. 289-302
This paper presents a novel approach to simulating turbulent flows by developing an adaptive multirelaxation scheme in the framework of lattice Boltzmann equation (LBE). Existing LBE methods in graphics simulations are usually insufficient for turbulent fl...
 
Scalable WIM: Effective Exploration in Large-scale Astrophysical Environments
Found in: IEEE Transactions on Visualization and Computer Graphics
By Y. Li, Chi-Wing Fu,A.J. Hanson
Issue Date:September 2006
pp. 1005-1012
Navigating through large-scale virtual environments such as simulations of the astrophysical Universe is difficult. The huge spatial range of astronomical models and the dominance of empty space make it hard for users to travel across cosmological scales e...
 
Making burr puzzles from 3D models
Found in: ACM SIGGRAPH 2011 papers (SIGGRAPH '11)
By Chi-Fu Lai, Chi-Wing Fu, Daniel Cohen-Or, Shiqing Xin, Tien-Tsin Wong, Ying He
Issue Date:August 2011
pp. 287-294
A 3D burr puzzle is a 3D model that consists of interlocking pieces with a single-key property. That is, when the puzzle is assembled, all the pieces are notched except one single key component which remains mobile. The intriguing property of the assembled...
     
Making burr puzzles from 3D models
Found in: ACM Transactions on Graphics (TOG)
By Chi-Fu Lai, Chi-Wing Fu, Daniel Cohen-Or, Shiqing Xin, Tien-Tsin Wong, Ying He
Issue Date:July 2011
pp. 1-33
A 3D burr puzzle is a 3D model that consists of interlocking pieces with a single-key property. That is, when the puzzle is assembled, all the pieces are notched except one single key component which remains mobile. The intriguing property of the assembled...
     
K-set tilable surfaces
Found in: ACM SIGGRAPH 2010 papers (SIGGRAPH '10)
By Chi-Fu Lai, Chi-Wing Fu, Daniel Cohen-Or, Ying He
Issue Date:July 2010
pp. 10-18
This paper introduces a method for optimizing the tiles of a quad-mesh. Given a quad-based surface, the goal is to generate a set of K quads whose instances can produce a tiled surface that approximates the input surface. A solution to the problem is a K-s...
     
A multi-touch interface for fast architectural sketching and massing
Found in: Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI '13)
By Chi-Wing Fu, Juncong Lin, Qian Sun, Sawako Kaijima, Ying He
Issue Date:April 2013
pp. 247-256
Architectural sketching and massing are used by designers to analyze and explore the design space of buildings. This paper describes a novel multi-touch interface for fast architectural sketching and massing of tall buildings. It incorporates a family of m...
     
Distinguishing multiple smart-phone interactions on a multi-touch wall display using tilt correlation
Found in: Proceedings of the 2011 annual conference on Human factors in computing systems (CHI '11)
By Chi-Wing Fu, Peng Song, William Hutama, Wooi Boon Goh
Issue Date:May 2011
pp. 3315-3318
While very large collaborative surfaces are already being widely employed to facilitate concurrent interactions with multiple users, they involve no personalization in the touch interactions. Augmenting them to identify the touch interactions with multiple...
     
An interactive multi-touch sketching interface for diffusion curves
Found in: Proceedings of the 2011 annual conference on Human factors in computing systems (CHI '11)
By Chi-Wing Fu, Qian Sun, Ying He
Issue Date:May 2011
pp. 1611-1614
Diffusion curves are effective 2D vector-graphics primitives, for creating smoothly-shaded drawings with rich colors and unique styles. Conventional drawing systems for diffusion curves often require users to successively layout curve geometry and then spe...
     
WYSIWYF: exploring and annotating volume data with a tangible handheld device
Found in: Proceedings of the 2011 annual conference on Human factors in computing systems (CHI '11)
By Chi-Wing Fu, Peng Song, Pheng-Ann Heng, Qiang Meng, Wooi Boon Goh
Issue Date:May 2011
pp. 1333-1342
Visual exploration of volume data often requires the user to manipulate the orientation and position of a slicing plane in order to observe, annotate or measure its internal structures. Such operations, with its many degrees of freedom in 3D space, map poo...
     
Multi-touch techniques for exploring large-scale 3D astrophysical simulations
Found in: Proceedings of the 28th international conference on Human factors in computing systems (CHI '10)
By Chi-Wing Fu, Junxiang Allen Ng, Wooi-Boon Goh
Issue Date:April 2010
pp. 2213-2222
Enabling efficient exploration of large-scale virtual environments such as those simulating astrophysical environments is highly challenging. Astrophysical virtual worlds span exceptionally large spatial scales occupied mostly by empty space, and this make...
     
LayerPaint: a multi-layer interactive 3D painting interface
Found in: Proceedings of the 28th international conference on Human factors in computing systems (CHI '10)
By Chi-Wing Fu, Jiazhi Xia, Ying He
Issue Date:April 2010
pp. 811-820
Painting on 3D surfaces is an important operation in computer graphics, virtual reality, and computer aided design. The painting styles in existing WYSIWYG systems can be awkward, due to the difficulty in rotating or aligning an object for proper viewing d...
     
Reciprocal frame structures made easy
Found in: ACM Transactions on Graphics (TOG)
By Chi-Wing Fu, Daniel Cohen-Or, Jianmin Zheng, Niloy J. Mitra, Peng Song, Prashant Goswami
Issue Date:July 2013
pp. 1-13
A reciprocal frame (RF) is a self-supported three-dimensional structure made up of three or more sloping rods, which form a closed circuit, namely an RF-unit. Large RF-structures built as complex grillages of one or a few similar RF-units have an intrinsic...
     
Recursive interlocking puzzles
Found in: ACM Transactions on Graphics (TOG)
By Chi-Wing Fu, Daniel Cohen-Or, Peng Song
Issue Date:November 2012
pp. 1-10
Interlocking puzzles are very challenging geometric problems with the fascinating property that once we solve one by putting together the puzzle pieces, the puzzle pieces interlock with one another, preventing the assembly from falling apart. Though interl...
     
Anisotropic blue noise sampling
Found in: ACM SIGGRAPH Asia 2010 papers (SIGGRAPH ASIA '10)
By Chi-Wing Fu, Hongwei Li, Li-Yi Wei, Pedro V. Sander
Issue Date:December 2010
pp. 20-21
Blue noise sampling is widely employed for a variety of imaging, geometry, and rendering applications. However, existing research so far has focused mainly on isotropic sampling, and challenges remain for the anisotropic scenario both in sample generation ...
     
Fast capacity constrained Voronoi tessellation
Found in: Proceedings of the 2010 ACM SIGGRAPH symposium on Interactive 3D Graphics and Games (I3D '10)
By Chi-Wing Fu, Diego Nehab, Hongwei Li, Li-Yi Wei, Pedro V. Sander
Issue Date:February 2010
pp. 1-1
Capacity constrained Voronoi tessellation (CCVT) [Balzer et al. 2009] addresses a crucial quality issue of Lloyd relaxation but at the expense of slower computation, which could hinder its potential wide adoption. We present a fast capacity constrained Vor...
     
3D polyomino puzzle
Found in: ACM SIGGRAPH Asia 2009 papers (SIGGRAPH Asia '09)
By Chi-Wing Fu, Hongwei Li, Kui-Yip Lo
Issue Date:December 2009
pp. 1-6
This paper presents a computer-aided geometric design approach to realize a new genre of 3D puzzle, namely the 3D Polyomino puzzle. We base our puzzle pieces on the family of 2D shapes known as polyominoes in recreational mathematics, and construct the 3D ...
     
Tile-based methods for interactive applications
Found in: ACM SIGGRAPH 2008 classes (SIGGRAPH '08)
By Ares Lagae, Chi-Wing Fu, Craig S. Kaplan, Oliver Deussen, Victor Ostromoukhov
Issue Date:August 2008
pp. 110-110
Over the last years, several techniques have been demonstrated that rely on tile-based methods. A lot of interactive applications could potentially benefit from these techniques. However, the state-of-the-art is scattered over several publications, and sur...
     
Solid texture synthesis from 2D exemplars
Found in: ACM Transactions on Graphics (TOG)
By Chi-Wing Fu, Dani Lischinski, Daniel Cohen-Or, Johannes Kopf, Oliver Deussen, Tien-Tsin Wong
Issue Date:July 2007
pp. 1-35
We present a novel method for synthesizing solid textures from 2D texture exemplars. First, we extend 2D texture optimization techniques to synthesize 3D texture solids. Next, the non-parametric texture optimization approach is integrated with histogram ma...
     
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