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Displaying 1-15 out of 15 total
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...
     
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...
 
Visual Reasoning about Social Networks Using Centrality Sensitivity
Found in: IEEE Transactions on Visualization and Computer Graphics
By Carlos D. Correa,Tarik Crnovrsanin,Kwan-Liu Ma
Issue Date:January 2012
pp. 106-120
In this paper, we study the sensitivity of centrality metrics as a key metric of social networks to support visual reasoning. As centrality represents the prestige or importance of a node in a network, its sensitivity represents the importance of the relat...
 
Visibility Histograms and Visibility-Driven Transfer Functions
Found in: IEEE Transactions on Visualization and Computer Graphics
By Carlos D. Correa, Kwan-Liu Ma
Issue Date:February 2011
pp. 192-204
Direct volume rendering is an important tool for visualizing complex data sets. However, in the process of generating 2D images from 3D data, information is lost in the form of attenuation and occlusion. The lack of a feedback mechanism to quantify the los...
 
Dataset Traversal with Motion-Controlled Transfer Functions
Found in: Visualization Conference, IEEE
By Carlos D. Correa, Deborah Silver
Issue Date:October 2005
pp. 46
In this paper, we describe a methodology and implementation for interactive dataset traversal using motion-controlled transfer functions. Dataset traversal here refers to the process of translating a transfer function along a specific path. In scientific v...
 
A Comparison of Gradient Estimation Methods for Volume Rendering on Unstructured Meshes
Found in: IEEE Transactions on Visualization and Computer Graphics
By Carlos D. Correa, Robert Hero, Kwan-Liu Ma
Issue Date:March 2011
pp. 305-319
This paper presents a study of gradient estimation methods for rendering unstructured-mesh volume data. Gradient estimation is necessary for rendering shaded isosurfaces and specular highlights, which provide important cues for shape and depth. Gradient es...
 
Social Network Discovery Based on Sensitivity Analysis
Found in: Social Network Analysis and Mining, International Conference on Advances in
By Tarik Crnovrsanin, Carlos D. Correa, Kwan-Liu Ma
Issue Date:July 2009
pp. 107-112
This paper presents a novel methodology for social network discovery based on the sensitivity coefficients of importance metrics, namely the Markov centrality of a node, a metric based on random walks. Analogous to node importance, which ranks the importan...
 
Visibility-driven transfer functions
Found in: Visualization Symposium, IEEE Pacific
By Carlos D. Correa, Kwan-Liu Ma
Issue Date:April 2009
pp. 177-184
Direct volume rendering is an important tool for visualizing complex data sets. However, in the process of generating 2D images from 3D data, information is lost in the form of attenuation and occlusion. The lack of a feedback mechanism to quantify the los...
 
A Simplification Architecture for Exploring Navigation Tradeoffs in Mobile VR
Found in: Virtual Reality Conference, IEEE
By Carlos D. Correa, Ivan Marsic
Issue Date:March 2004
pp. 133
Interactive applications on mobile devices often reduce data fidelity to adapt to resource constraints and variable user preferences. In virtual reality applications, the problem of reducing scene graph fidelity can be stated as a combinatorial optimizatio...
 
Automatic registration of LiDAR and optical imagery using depth map stereo
Found in: 2014 IEEE International Conference on Computational Photography (ICCP)
By Hyojin Kim,Carlos D. Correa,Nelson Max
Issue Date:May 2014
pp. 1-8
Automatic fusion of aerial optical imagery and untextured LiDAR data has been of significant interest for generating photo-realistic 3D urban models in recent years. However, unsupervised, robust registration still remains a challenge. This paper presents ...
   
Locally-scaled spectral clustering using empty region graphs
Found in: Proceedings of the 18th ACM SIGKDD international conference on Knowledge discovery and data mining (KDD '12)
By Carlos D. Correa, Peter Lindstrom
Issue Date:August 2012
pp. 1330-1338
This paper introduces a new method for estimating the local neighborhood and scale of data points to improve the robustness of spectral clustering algorithms. We employ a subset of empty region graphs - the β-skeleton - and non-linear diffusion to def...
     
Graph-based fire synthesis
Found in: Proceedings of the 2011 ACM SIGGRAPH/Eurographics Symposium on Computer Animation (SCA '11)
By Carlos D. Correa, Kwan-Liu Ma, Yubo Zhang
Issue Date:August 2011
pp. 187-194
We present a novel graph-based data-driven technique for cost-effective fire modeling. This technique allows composing long animation sequences using a small number of short simulations. While traditional techniques such as motion graphs and motion blendin...
     
Distance visualization of ultrascale data with explorable images
Found in: ACM SIGGRAPH 2010 Talks (SIGGRAPH '10)
By Anna Tikhonova, Carlos D. Correa, Kwan-Liu Ma
Issue Date:July 2010
pp. 1-1
This talk presents a new approach to distance visualization of very large data sets output from scientific supercomputing. The processing power of massively parallel supercomputers increases at a rather fast rate, about an order of magnitude faster every t...
     
Dynamic video narratives
Found in: ACM SIGGRAPH 2010 papers (SIGGRAPH '10)
By Carlos D. Correa, Kwan-Liu Ma
Issue Date:July 2010
pp. 10-18
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...
     
Visualizing collision effects between penetrating and non-penetrating objects
Found in: ACM SIGGRAPH 2007 sketches on XX (SIGGRAPH '07)
By Carlos D. Correa, Deborah Silver
Issue Date:August 2007
pp. 47-es
We present a novel method for visualizing collisions effects between penetrating or non-penetrating objects. The interaction of 3D objects has been traditionally divided into two stages: the detection of a collision, and the response or effects after the c...
     
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