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Displaying 1-50 out of 170 total
An Interface Design for Future Cloud-Based Visualization Services
Found in: Cloud Computing Technology and Science, IEEE International Conference on
By Yuzuru Tanahashi, Cheng-Kai Chen, Stéphane Marchesin, Kwan-Liu Ma
Issue Date:December 2010
pp. 609-613
The pervasive concept of cloud computing suggests that visualization, which is both data and computing intensive, is a perfect cloud computing application. This paper presents a sketch of an interface design for an online visualization service. To make suc...
 
Intelligent Feature Extraction and Tracking for Visualizing Large-Scale 4D Flow Simulations
Found in: SC Conference
By Fan-Yin Tzeng, Kwan-Liu Ma
Issue Date:November 2005
pp. 6
<p> Terascale simulations produce data that is vast in spatial, temporal, and variable domains, creating a formidable challenge for subsequent analysis. Feature extraction as a data reduction method offers a viable solution to this large data problem...
 
A Model for the Visualization Exploration Process
Found in: Visualization Conference, IEEE
By T.J. Jankun-Kelly, Kwan-Liu Ma, Michael Gertz
Issue Date:November 2002
pp. N/A
The current state of the art in visualization research places a strong emphasis on different techniques to derive insight from disparate types of data. However, little work has investigated the visualization process itself. The information content of the v...
 
ViSizer: A Visualization Resizing Framework
Found in: IEEE Transactions on Visualization and Computer Graphics
By Yingcai Wu, Xiaotong Liu, Shixia Liu, Kwan-Liu Ma
Issue Date:February 2013
pp. 278-290
Visualization resizing is useful for many applications where users may use different display devices. General resizing techniques (e.g., uniform scaling) and image-resizing techniques suffer from several drawbacks, as they do not consider the content of th...
 
Illustrative Rendering Techniques for Visualization: Future of Visualization or Just Another Technique?
Found in: Visualization Conference, IEEE
By Dirk Bartz, Hans Hagen, Victoria Interrante, Kwan-Liu Ma, Bernhard Preim
Issue Date:October 2005
pp. 120
<p>Illustrative rendering has gone a long way already. While it has been a topic at Eurographics, ACM SIGGRAPH, and other events since the early nineties, it was basically introduced to visualization by Interrante et al. in 1996 [2], and later by Tre...
 
Dynamic video narratives
Found in: ACM Transactions on Graphics (TOG)
By Carlos D. Correa, Kwan-Liu Ma, Carlos D. Correa, Kwan-Liu Ma, Carlos D. Correa, Kwan-Liu Ma, Carlos D. Correa, Kwan-Liu Ma
Issue Date:July 2010
pp. 1-10
This paper presents a system for generating dynamic narratives from videos. These narratives are characterized for being compact, coherent and interactive, as inspired by principles of sequential art. Narratives depict the motion of one or several actors o...
     
Living Liquid: Design and Evaluation of an Exploratory Visualization Tool for Museum Visitors
Found in: IEEE Transactions on Visualization and Computer Graphics
By J. Ma,I. Liao, Kwan-Liu Ma,J. Frazier
Issue Date:December 2012
pp. 2799-2808
Interactive visualizations can allow science museum visitors to explore new worlds by seeing and interacting with scientific data. However, designing interactive visualizations for informal learning environments, such as museums, presents several challenge...
 
A PC Cluster System for Simultaneous Interactive Volumetric Modeling and Visualization
Found in: Parallel and Large-Data Visualization and Graphics, IEEE Symposium on
By Shigeru Muraki, Eric. B. Lum, Kwan-Liu Ma, Masato Ogata, Xuezhen Liu
Issue Date:October 2003
pp. 13
A number of problems are well suited for volumetric representation for both simulation and storage, however, the large amount of data that needs to be processed and rendered with these volumes makes interactive manipulation extremely challenging.<div>...
 
A Multi-Criteria Approach to Camera Motion Design for Volume Data Animation
Found in: IEEE Transactions on Visualization and Computer Graphics
By Wei-Hsien Hsu,Yubo Zhang,Kwan-Liu Ma
Issue Date:December 2013
pp. 2792-2801
We present an integrated camera motion design and path generation system for building volume data animations. Creating animations is an essential task in presenting complex scientific visualizations. Existing visualization systems use an established animat...
 
Lighting Design for Globally Illuminated Volume Rendering
Found in: IEEE Transactions on Visualization and Computer Graphics
By Yubo Zhang,Kwan-Liu Ma
Issue Date:December 2013
pp. 2946-2955
With the evolution of graphics hardware, high quality global illumination becomes available for real-time volume rendering. Compared to local illumination, global illumination can produce realistic shading effects which are closer to real world scenes, and...
 
Visualizing Flow of Uncertainty through Analytical Processes
Found in: IEEE Transactions on Visualization and Computer Graphics
By Yingcai Wu,Guo-Xun Yuan,Kwan-Liu Ma
Issue Date:December 2012
pp. 2526-2535
Uncertainty can arise in any stage of a visual analytics process, especially in data-intensive applications with a sequence of data transformations. Additionally, throughout the process of multidimensional, multivariate data analysis, uncertainty due to da...
 
Fuzzy Volume Rendering
Found in: IEEE Transactions on Visualization and Computer Graphics
By Nathaniel Fout,Kwan-Liu Ma
Issue Date:December 2012
pp. 2335-2344
In order to assess the reliability of volume rendering, it is necessary to consider the uncertainty associated with the volume data and how it is propagated through the volume rendering algorithm, as well as the contribution to uncertainty from the renderi...
 
An Adaptive Prediction-Based Approach to Lossless Compression of Floating-Point Volume Data
Found in: IEEE Transactions on Visualization and Computer Graphics
By Nathaniel Fout,Kwan-Liu Ma
Issue Date:December 2012
pp. 2295-2304
In this work, we address the problem of lossless compression of scientific and medical floating-point volume data. We propose two prediction-based compression methods that share a common framework, which consists of a switched prediction scheme wherein the...
 
Keynote address: New approaches to large data visualization
Found in: Visualization Symposium, IEEE Pacific
By Kwan-Liu Ma
Issue Date:March 2011
pp. xi
Advanced computing and imaging technologies enable scientists to study natural and physical phenomena at unprecedented precision, resulting in an explosive growth of data. Furthermore, the size of the collected information about the Internet and mobile dev...
 
Visualization by Proxy: A Novel Framework for Deferred Interaction with Volume Data
Found in: IEEE Transactions on Visualization and Computer Graphics
By Anna Tikhonova, Carlos D. Correa, Kwan-Liu Ma
Issue Date:November 2010
pp. 1551-1559
Interactivity is key to exploration of volume data. Interactivity may be hindered due to many factors, e.g. large data size,high resolution or complexity of a data set, or an expensive rendering algorithm. We present a novel framework for visualizing volum...
 
Visualizing Flow Trajectories Using Locality-based Rendering and Warped Curve Plots
Found in: IEEE Transactions on Visualization and Computer Graphics
By Chad Jones, Kwan-Liu Ma
Issue Date:November 2010
pp. 1587-1594
In flow simulations the behavior and properties of particle trajectories often depend on the physical geometry containedin the simulated environment. Understanding the flow in and around the geometry itself is an important part of analyzing the data.Previo...
 
The Occlusion Spectrum for Volume Classification and Visualization
Found in: IEEE Transactions on Visualization and Computer Graphics
By Carlos Correa, Kwan-Liu Ma
Issue Date:November 2009
pp. 1465-1472
Despite the ever-growing improvements on graphics processing units and computational power, classifying 3D volume data remains a challenge.In this paper, we present a new method for classifying volume data based on the ambient occlusion of voxels. This inf...
 
code_swarm: A Design Study in Organic Software Visualization
Found in: IEEE Transactions on Visualization and Computer Graphics
By Michael Ogawa, Kwan-Liu Ma
Issue Date:November 2009
pp. 1097-1104
In May of 2008, we published online a series of software visualization videos using a method called code_swarm. Shortly thereafter, we made the code open source and its popularity took off. This paper is a study of our code swarm application, comprising it...
 
Visual Analysis of Inter-Process Communication for Large-Scale Parallel Computing
Found in: IEEE Transactions on Visualization and Computer Graphics
By Chris Muelder, Francois Gygi, Kwan-Liu Ma
Issue Date:November 2009
pp. 1129-1136
In serial computation, program profiling is often helpful for optimization of key sections of code. When moving to parallel computation, not only does the code execution need to be considered but also communication between the different processes which can...
 
Curve-Centric Volume Reformation for Comparative Visualization
Found in: IEEE Transactions on Visualization and Computer Graphics
By Ove Daae Lampe, Carlos Correa, Kwan-Liu Ma, Helwig Hauser
Issue Date:November 2009
pp. 1235-1242
We present two visualization techniques for curve-centric volume reformation with the aim to create compelling comparative visualizations. A curve-centric volume reformation deforms a volume, with regards to a curve in space, to create a new space in which...
 
Size-based Transfer Functions: A New Volume Exploration Technique
Found in: IEEE Transactions on Visualization and Computer Graphics
By Carlos Correa, Kwan-Liu Ma
Issue Date:November 2008
pp. 1380-1387
The visualization of complex 3D images remains a challenge, a fact that is magnified by the difficulty to classify or segment volume data. In this paper, we introduce size-based transfer functions, which map the local scale of features to color and opacity...
 
Guest Editor's Introduction: Visualization for Cybersecurity
Found in: IEEE Computer Graphics and Applications
By Kwan-Liu Ma
Issue Date:March 2006
pp. 26-27
The guest editor introduces this special issue. The five theme articles highlight the latest development and practice for visualization for cybersecurity.
 
Guest Editors' Introduction: Special Section on IEEE Visualization Applications
Found in: IEEE Transactions on Visualization and Computer Graphics
By Eduard Groller, Kwan-Liu Ma, Klaus Mueller
Issue Date:September 2005
pp. 483-484
No summary available.
 
Parallel visualization of large-scale aerodynamics calculations: a case study on the Cray T3E
Found in: Parallel and Large-Data Visualization and Graphics, IEEE Symposium on
By Thomas W. Crockett, Kwan-Liu Ma
Issue Date:October 1999
pp. 15-20
This paper reports the performance of a parallel volume rendering algorithm for visualizing a large-scale unstructed-grid dataset produced by a three-dimensional aerodynamics simulation. This dataset, containing over 18 million tetrahedra, allows us to ext...
 
A scalable parallel cell-projection volume rendering algorithm for three-dimensional unstructured data
Found in: Parallel Rendering Symposium
By Kwan-Liu Ma, T.W. Crockett
Issue Date:October 1997
pp. 95
Visualizing three dimensional unstructured data from aerodynamics calculations is challenging because the associated meshes are typically large in size and irregular in both shape and resolution. The goal of this research is to develop a fast, efficient pa...
 
Parallel Volume Rendering Using Binary-Swap Compositing
Found in: IEEE Computer Graphics and Applications
By Kwan-Liu Ma, James S. Painter, Charles D. Hansen, Michael F. Krogh
Issue Date:July 1994
pp. 59-68
<p>We describe a parallel volume-rendering algorithm, which consists of two parts: parallel ray tracing and parallel compositing. In the most recent implementation on Connection Machine's CM-5 and networked workstations, the parallel volume renderer ...
 
Let It Flow: A Static Method for Exploring Dynamic Graphs
Found in: 2014 IEEE Pacific Visualization Symposium (PacificVis)
By Weiwei Cui, Xiting Wang, Shixia Liu,Nathalie H. Riche,Tara M. Madhyastha, Kwan Liu Ma, Baining Guo
Issue Date:March 2014
pp. 121-128
Research into social network analysis has shown that graph metrics, such as degree and closeness, are often used to summarize structural changes in a dynamic graph. However there have been few visual analytics approaches that have been proposed to help ana...
 
Ambiguity-Free Edge-Bundling for Interactive Graph Visualization
Found in: IEEE Transactions on Visualization and Computer Graphics
By Sheng-Jie Luo, Chun-Liang Liu, Bing-Yu Chen, Kwan-Liu Ma
Issue Date:May 2012
pp. 810-821
Graph visualization has been widely used to understand and present both global structural and local adjacency information in relational data sets (e.g., transportation networks, citation networks, or social networks). Graphs with dense edges, however, are ...
 
Next-Generation Visual Supercomputing Using PC Clusters with Volume Graphics Hardware Devices
Found in: SC Conference
By Shigeru Muraki, Masato Ogata, Kwan-Liu Ma, Kenji Koshizuka, Kagenori Kajihara, Xuezhen Liu, Yasutada Nagano, Kazuro Shimokawa
Issue Date:November 2001
pp. 44
To seek a low-cost, extensible solution for the large-scale data visualization problem, a visual computing system is designed as a result of a collaboration between industry and government research laboratories in Japan, also with participation by research...
 
An Integrated Exploration Approach to Visualizing Multivariate Particle Data
Found in: Computing in Science and Engineering
By Chad Jones, Kwan-Liu Ma, Stéphane Ethier, Wei-Li Lee
Issue Date:July 2008
pp. 20-29
The authors describe a data exploration system that visualizes time-varying, multivariate, point-based data from gyrokinetic particle simulations. By using two interaction modes, their system lets researchers explore collections of densely packed particles...
 
End-to-end data reduction and hardware accelerated rendering techniques for visualizing time-varying non-uniform grid volume data
Found in: International Workshop on Volume Graphics
By H. Akiba, Kwan-Liu Ma, J. Clyne
Issue Date:June 2005
pp. 31-225
We present a systematic approach for direct volume rendering terascale-sized data that are time-varying, and possibly non-uniformly sampled, using only a single commodity graphics PC. Our method employs a data reduction scheme that combines lossless, wavel...
 
Deploying Web-Based Visual Exploration Tools on the Grid
Found in: IEEE Computer Graphics and Applications
By T.J. Jankun-Kelly, Oliver Kreylos, Kwan-Liu Ma, Bernd Hamann, Kenneth I. Joy, John Shalf, E. Wes Bethel
Issue Date:March 2003
pp. 40-50
<p>A Web-based portal enables the exploration, encapsulation, and dissemination of visualization results over the grid. This portal integrates an interface client for structured visualization exploration, a visualization Web application to manage the...
 
A Hardware-Assisted Scalable Solution for Interactive Volume Rendering of Time-Varying Data
Found in: IEEE Transactions on Visualization and Computer Graphics
By Eric B. Lum, Kwan-Liu Ma, John Clyne
Issue Date:July 2002
pp. 286-301
<p>We present a scalable volume rendering technique that exploits lossy compression and low-cost commodity hardware to permit highly interactive exploration of time-varying scalar volume data. A palette-based decoding technique and an adaptive bit al...
 
The Generalized Sensitivity Scatterplot
Found in: IEEE Transactions on Visualization and Computer Graphics
By Yu-Hsuan Chan,C. D. Correa, Kwan-Liu Ma
Issue Date:October 2013
pp. 1768-1781
Scatterplots remain a powerful tool to visualize multidimensional data. However, accurately understanding the shape of multidimensional points from 2D projections remains challenging due to overlap. Consequently, there are a lot of variations on the scatte...
 
A Study on Enhancing Timeline-Like Visualization with Verbal Text
Found in: 2013 International Conference on Cyberworlds (CW)
By Jia-Kai Chou,Isaac Liao, Kwan-Liu Ma, Chuan-Kai Yang
Issue Date:October 2013
pp. 206-213
There has been a long-standing question of whether sound or audio annotations may assist in data visualization tasks. This paper presents our study focusing on enhancing timeline/storyline like visualizations with audio annotations. Timeline visualizations...
 
OnMyWay: A Task-Oriented Visualization and Interface Design for Planning Road Trip Itinerary
Found in: 2013 International Conference on Cyberworlds (CW)
By Yuzuru Tanahashi, Kwan-Liu Ma
Issue Date:October 2013
pp. 199-205
Web applications are abundant and used daily by a variety of people. Planning a trip, for example, has become much easier with Web applications such as Google Maps. Nevertheless, to thoroughly design a personalized trip, the user often needs to manually se...
 
Real-Time Volume Rendering in Dynamic Lighting Environments Using Precomputed Photon Mapping
Found in: IEEE Transactions on Visualization and Computer Graphics
By Yubo Zhang, Zhao Dong, Kwan-Liu Ma
Issue Date:August 2013
pp. 1317-1330
We present a framework for precomputed volume radiance transfer that achieves real-time rendering of global illumination effects for volume data sets such as multiple scattering, volumetric shadows, and so on. Our approach incorporates the volumetric photo...
 
Large-Scale Graph Visualization and Analytics
Found in: Computer
By Kwan-Liu Ma,Chris W. Muelder
Issue Date:July 2013
pp. 39-46
Novel approaches to network visualization and analytics use sophisticated metrics that enable rich interactive network views and node grouping and filtering. A survey of graph layout and simplification methods reveals considerable progress in these new dir...
 
Big-Data Visualization
Found in: IEEE Computer Graphics and Applications
By Daniel Keim,Huamin Qu,Kwan-Liu Ma
Issue Date:July 2013
pp. 20-21
Almost all fields of study and practice sooner or later will confront the big-data problem. Visualization has proven effective for not only presenting essential information in vast amounts of data but also driving complex analyses. Big-data analytics and d...
 
A Visual Network Analysis Method for Large-Scale Parallel I/O Systems
Found in: 2013 IEEE International Symposium on Parallel & Distributed Processing (IPDPS)
By Carmen Sigovan,Chris Muelder,Kwan-Liu Ma,Jason Cope,Kamil Iskra,Robert Ross
Issue Date:May 2013
pp. 308-319
Parallel applications rely on I/O to load data, store end results, and protect partial results from being lost to system failure. Parallel I/O performance thus has a direct and significant impact on application performance. Because supercomputer I/O system...
 
Perceptually-Based Depth-Ordering Enhancement for Direct Volume Rendering
Found in: IEEE Transactions on Visualization and Computer Graphics
By Lin Zheng, Yingcai Wu, Kwan-Liu Ma
Issue Date:March 2013
pp. 446-459
Visualizing complex volume data usually renders selected parts of the volume semitransparently to see inner structures of the volume or provide a context. This presents a challenge for volume rendering methods to produce images with unambiguous depth-order...
 
Design Considerations for Optimizing Storyline Visualizations
Found in: IEEE Transactions on Visualization and Computer Graphics
By Y. Tanahashi, Kwan-Liu Ma
Issue Date:December 2012
pp. 2679-2688
Storyline visualization is a technique used to depict the temporal dynamics of social interactions. This visualization technique was first introduced as a hand-drawn illustration in XKCD's “Movie Narrative Charts” [21]. If properly constructed, the visuali...
 
Crucial Nodes Centric Visual Monitoring and Analysis of Computer Networks
Found in: 2012 International Conference on Cyber Security (CyberSecurity)
By Hanchen Song,Chris W. Muelder,Kwan-Liu Ma
Issue Date:December 2012
pp. 16-23
Monitoring of computer network events is essential in uncertain and time varying situations. Several techniques and tools have been developed to reveal useful patterns from raw network data sets. Challenges for network monitoring include processing massive...
 
A Process for Visualizing Disordered Molecular Data with a Case Study in Bulk Water
Found in: 2012 ASE/IEEE International Conference on BioMedical Computing (BioMedCom)
By Nick Leaf,Kwan-Liu Ma,Cui Zhang,Giulia Galli
Issue Date:December 2012
pp. 34-42
Existing molecular visualizations do a good job of illuminating well-defined structures, but are ill-suited to visualizing subtle organization when the data is almost entirely disordered. We introduce a process to explore these subtle structures by visuali...
 
Scalable Training of Sparse Linear SVMs
Found in: 2012 IEEE 12th International Conference on Data Mining (ICDM)
By Guo-Xun Yuan,Kwan-Liu Ma
Issue Date:December 2012
pp. 775-784
Sparse linear support vector machines have been widely applied to variable selection in many applications. For large data, managing the cost of training a sparse model with good predication performance is an essential topic. In this work, we propose a scal...
 
Abstract: Bringing Task and Data Parallelism to Analysis of Climate Model Output
Found in: 2012 SC Companion: High Performance Computing, Networking, Storage and Analysis (SCC)
By R. Jacob,J. Krishna, Xiabing Xu,S. Mickelson,T. Tautges,M. Wilde,R. Latham,I. Foster,R. Ross,M. Hereld,J. Larson,P. Bochev,K. Peterson,M. Taylor,K. Schuchardt, Jain Yin,D. Middleton,M. Haley,D. Brown, Wei Huang,D. Shea,R. Brownrigg,M. Vertenstein, Kwan-Liu Ma, Jingrong Xie
Issue Date:November 2012
pp. 1493-1494
Climate models are both outputting larger and larger amounts of data and are doing it on more sophisticated numerical grids. The tools climate scientists have used to analyze climate output, an essential component of climate modeling, are single threaded a...
 
Poster: Bringing Task and Data Parallelism to Analysis of Climate Model Output
Found in: 2012 SC Companion: High Performance Computing, Networking, Storage and Analysis (SCC)
By Robert Jacob,Jayesh Krishna,Xiabing Xu,Sheri Mickelson,Tim Tautges,Mike Wilde,Robert Latham,Ian Foster,Robert Ross,Mark Hereld,Jay Larson,Pavel Bochev,Kara Peterson,Mark Taylor,Karen Schuchardt,Jain Yin,Don Middleton,Mary Haley,David Brown,Wei Huang,Dennis Shea,Richard Brownrigg,Mariana Vertenstein,Kwan-Liu Ma,Jingrong Xie
Issue Date:November 2012
pp. 1495
Climate models are both outputting larger and larger amounts of data and are doing it on more sophisticated numerical grids. The tools climate scientists have used to analyze climate output, an essential component of climate modeling, are single threaded a...
 
Flexible Analysis Software for Emerging Architectures
Found in: 2012 SC Companion: High Performance Computing, Networking, Storage and Analysis (SCC)
By Kenneth Moreland,Brad King,Robert Maynard,Kwan-Liu Ma
Issue Date:November 2012
pp. 821-826
We are on the threshold of a transformative change in the basic architecture of high-performance computing. The use of accelerator processors, characterized by large core counts, shared but asymmetrical memory, and heavy thread loading, is quickly becoming...
 
Visual cluster exploration of web clickstream data
Found in: 2012 IEEE Conference on Visual Analytics Science and Technology (VAST)
By Jishang Wei,Zeqian Shen,Neel Sundaresan,Kwan-Liu Ma
Issue Date:October 2012
pp. 3-12
Web clickstream data are routinely collected to study how users browse the web or use a service. It is clear that the ability to recognize and summarize user behavior patterns from such data is valuable to e-commerce companies. In this paper, we introduce ...
 
A Job Scheduling Design for Visualization Services Using GPU Clusters
Found in: 2012 IEEE International Conference on Cluster Computing (CLUSTER 2012)
By Wei-Hsien Hsu, Chun-Fu Wang, Kwan-Liu Ma, Hongfeng Vu,J. H. Chen
Issue Date:September 2012
pp. 523-533
Modern large-scale heterogeneous computers incorporating GPUs offer impressive processing capabilities. It is desirable to fully utilize such systems for serving multiple users concurrently to visualize large data at interactive rates. However, as the disp...
 
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