Associate Professor of Computer Science
Office: LWSN 3179
Tel: (765) 494-6010
Fax : (765) 494-0739
The ModelCamera is a fast, easy to use, and inexpensive 3D scene modeling system. The ModelCamera acquires dense color (720x480 video frames) augmented with sparse depth (7x7 to 11x11 depth samples). The frames are registered and merged into an evolving model at the rate of five frames per second. The model is displayed continually to provide immediate operator feedback.
Images are used in computer graphics and visualization to convey information. Images are computed by sampling data with rays defined by a camera model. Most images used in computer graphics and visualization are computed using the planar pinhole camera model, which suffers from important limitations such as uniform sampling rate, and single viewpoint. We propose to overcome these limitations through camera model design, an infrastructure-level innovation with broad applicability, including in 3-D scene exploration, remote visualization, acceleration of high-cost rendering effects, and video surveillance.
The goal is to research, implement, deploy and assess a distance learning system that extends the real classroom to accommodate remotely located students. The system will convey to both remote and local participants a strong sense that the remote participants are actually present in the classroom.
The goal of our team was to produce a visualization of the September 2001 attack on the Pentagon. The immediate motivation for the project was to understand the behavior of the building under the impact. The longer term motivation was to establish a path for producing high-quality visualizations of large scale simulations. For this we created a reusable and scalable link between the worlds of computer simulation and computer animation.
We study 3D shape perception using a volumetric 3D display that allows several users to observe simultaneously a sculpture of light without the disadvantages of uncomfortable eyewear, jittery trackers, rendering pipeline latency, and strenuous vergence and accommodation. A secondary goal of this project is to evaluate this alternative display technology.
Journals (some also presented at conferences as noted)
Simplification of Node Position Data for Interactive Visualization of Dynamic Datasets. Paul Rosen, Voicu Popescu. IEEE Transactions on Visualization and Computer Graphics, vol. 18, no. 9, 2012, pp. 1537-1548. Also presented at IEEE Visualization 2012.
Non-Pinhole Approximations for Interactive Rendering. Paul Rosen, Voicu Popescu, Kyle Hayward, and Chris Wyman. IEEE Computer Graphics and Applications, Volume 31, Issue 6, November-December 2011, pp. 68-83.
An Evaluation of 3-D Scene Exploration Using a Multiperspective Image Framework. Paul Rosen and Voicu Popescu. The Visual Computer Volume 27, Numbers 6-8, pp. 623-632. Also presented at Computer Graphics International 2011.
A Curved Ray Camera for Handling Occlusions through Continuous Multiperspective Visualization. Jian Cui, Paul Rosen, Voicu Popescu, and Christoph Hoffmann. IEEE Transactions on Visualization and Computer Graphics, vol. 16, no. 6, November/December 2010, pp. 1235-1242. Also presented at IEEE Visualization 2010.
The General Pinhole Camera. Voicu Popescu, Paul Rosen, Laura Arns, Chris Wyman, Xavier Tricoche, Tion Thomas, Christoph Hoffmann. IEEE Transactions on Visualization and Computer Graphics, vol. 16, no. 5, September/October 2010, pp. 777-790.
The Graph Camera. Voicu Popescu, Paul Rosen, and Nicoletta Adamo-Villani. ACM Transactions on Computer Graphics, article number 158, 2009. Also presented at SIGGRAPH Asia 2009.
Compact Real-Time Modeling of Seated Humans by Video Sprite Sequence Quantization. Chun Jia and Voicu Popescu. The Visual Computer, Volume 25, Numbers 5-7, April 2009. Also presented at Computer Graphics International 2009.
High-Quality High-Fidelity Visualization of the September 11 Attack on the
World Trade Center. Paul Rosen,
1001 Acquisition Viewpoints—Efficient and Versatile View-Dependent Modeling of Real-World Scenes. Mihai Mudure and Voicu Popescu. The Visual Computer, Volume 24, Numbers 7-9, July 2008. Also presented at Computer Graphics International 2008.
Classroom Extension for Distance Education. Radu Dondera,
Visualization by Outsourcing.
Camera Design for Acquiring Active Environments. Daniel Aliaga, Yi
of Surfaces from Line Drawings. Christoph Hoffmann, Zygmunt Pizlo,
Reflected-Scene Impostors for Realistic Reflections
at Interactive Rates.
Efficient Large-Scale Acquisition of Building Interiors. Gleb Bahmutov,
Three-Dimensional Display Rendering Acceleration
Using Occlusion Camera Reference Images.
Cameras for Feed Forward Reflection Rendering.
Study of the Perception of 3D Spatial
Relations for a Volumetric Display. Christoph Hoffmann, Zygmunt Pizlo,
Occlusion Camera. Chunhui Mei,
in Visualizing Large-Scale Simulations.
Pentagon on September 11th. Christoph Hoffmann,
The WarpEngine: An Architecture for
the Post-Polygonal Age.
V. Popescu, J. Eyles, A. Lastra,
for Accelerating Architectural Walkthroughs. Matthew Rafferty, Daniel Aliaga,
Interactive Photorealistic Inside-Looking-Out Automated 3-D Modeling. Voicu Popescu and Mihai Mudure. In Proceedings of Interservice/Industry Training, Simulation, and Education Conference (I/ITSEC), 2008.
General-Purpose Visualization of Large-Scale Finite Element Analysis Simulations. Voicu Popescu and Christoph Hoffmann. In Proceedings of Interservice/Industry Training, Simulation, and Education Conference (I/ITSEC), 2008.
The Epipolar Occlusion Camera. Paul Rosen and Voicu Popescu. In Proceedings of ACM Symposium on Interactive 3D Graphics and Games, 2008.
Soft Shadow Occlusion Camera.
interactivity and presence in an online distance learning system. Melissa
Dark, Cynthia York,
Hybrid Forward-Backward Method for Rendering Reflections. Chunhui Mei,
Multi-Expertise Application-Driven Class.
Efficient Error-Bounded General Camera Model.
Depth Discontinuity Occlusion Camera.
Enhanced Panoramas. Gleb Bahmutov,
Modeling from Dense Color and Sparse Depth.
of 3D spatial relations in 3D images. Paul Rosen, Christoph Hoffmann,
Point-Based Modeling from Dense Color and Sparse Depth.
and Advances in Interactive 3D Modeling.
High-Quality Visualizations of Large-Scale Simulations.
ModelCamera: A Hand-Held Device for Interactive
Processing and Rendering Real-World Scenes. L. Nyland,
A. Lastra, D. McAllister, V. Popescu, C. McCue.
Proc. of Videometrics and Optical Methods for 3D
Shape Measurement, Electronic Imaging 2001, Photonics West,
parallelism for Image-Based Rendering.
Interactive exploration of acquired 3D data. L. Nyland, D. McAllister, V. Popescu, C. McCue, and A. Lastra. Proceedings of the SPIE Applied Image and Pattern Recognition Conference, October 13-15, 1999.
The Impact of Dense Range Data on Computer Graphics. L. Nyland, D. McAllister, V. Popescu, C. McCue, A. Lastra et al. Proceedings of Multi-View Modeling and Analysis Workshop, June 23-26, 1999.
Real-Time Rendering of Real-World Environments. D. McAllister, L. Nyland, V. Popescu, A. Lastra, C. McCue. Proceedings of the Eurographics Workshop on Rendering, June 21-23, 1999.
Efficient Warping for Architectural Walkthroughs using Layered Depth Images. V. Popescu, A. Lastra, D. Aliaga, M. Oliveira. In Proceedings of IEEE Visualization '98, pages 211 - 215, Oct18-23, 1998.