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Submissions
[ Click here1 ] to access. Submitted papers area is only available to Columbia graphics research groups.

2008

Journal
A Precomputed Polynomial Representation for Interactive BRDF Editing with Global Illumination
Aner Ben-Artzi, Kevin Egan, Frédo Durand, Ravi Ramamoorthi,
ACM Transactions on Graphics, 2008.
[PDF] [bib] [Video]
Discrete Elastic Rods
Miklós Bergou, Max Wardetzky, Stephen Robinson, Basile Audoly, Eitan Grinspun,
SIGGRAPH ( ACM Transactions on Graphics), 2008.
[PDF] [bib] [Project] [Video]
Light Field Transfer: Global Illumination Between Real and Synthetic Objects
Oliver Cossairt, Shree Nayar, Ravi Ramamoorthi,
SIGGRAPH ( ACM Transactions on Graphics), 2008.
[PDF] [bib] [Project] [Video]
Multiscale Texture Synthesis
Charles Han, Eric Risser, Ravi Ramamoorthi, Eitan Grinspun,
SIGGRAPH ( ACM Transactions on Graphics), pp.51, 2008.
[PDF] [bib] [Project] [Video]
Robust Treatment of Simultaneous Collisions
David Harmon, Etienne Vouga, Rasmus Tamstorf, and Eitan Grinspun,
SIGGRAPH ( ACM Transactions on Graphics), 2008.
[PDF] [bib] [Project] [Video]
Conference
Large Ray Packets for Real-time Whitted Ray Tracing
Ryan Overbeck, Ravi Ramamoorthi, and William R. Mark,
2008.
[PDF] [bib] [Project]
2007

Journal
A First Order Analysis of Lighting, Shading, and Shadows
Ravi Ramamoorthi, Dhruv Mahajan and Peter Belhumeur,
ACM Transactions on Graphics , 2007.
[PDF] [bib] [Project]
Discrete Quadratic Curvature Energies
Max Wardetzky, Miklós Bergou, David Harmon, Denis Zorin, and Eitan Grinspun,
Computer Aided Geometric Design, 2007.
[PDF] [bib] [Project]
A Theory of Frequency Domain Invariants: Spherical Harmonic Identities for BRDF/Lighting Transfer and Image Consistency
Dhruv Mahajan, Ravi Ramamoorthi, Brian Curless,
IEEE Transactions on Pattern Analysis and Machine Intelligence, 2007.
[PDF] [bib] [Project]
Time-Varying BRDFs
Bo Sun, Kalyan Sunkavalli, Ravi Ramamoorthi, Peter Belhumeur, and Shree Nayar,
IEEE Transactions on Visualization and Computer Graphics, 2007.
[PDF] [bib] [Project] [Video]
A Theory of Locally Low Dimensional Light Transport
Dhruv Mahajan, Ira Kemelmacher Shlizerman, Ravi Ramamoorthi, Peter Belhumeur,
SIGGRAPH ( ACM Transactions on Graphics), 2007.
[PDF] [bib] [Project] [Video]
Active Refocusing of Images and Videos
Francesc Moreno-Noguer, Peter N. Belhumeur, Shree K. Nayar,
SIGGRAPH ( ACM Transactions on Graphics), 2007.
[PDF] [bib] [Video]
Efficient Simulation of Inextensible Cloth
Rony Goldenthal, David Harmon, Raanan Fattal, Michel Bercovier, Eitan Grinspun,
SIGGRAPH ( ACM Transactions on Graphics), 2007.
[PDF] [bib] [Project] [Video]
Frequency Domain Normal Map Filtering
Charles Han, Bo Sun, Ravi Ramamoorthi, and Eitan Grinspun,
SIGGRAPH ( ACM Transactions on Graphics), pp.28, 2007.
[PDF] [bib] [Project] [Video]
Prakash: Lighting Aware Motion Capture using Photosensing Markers and Multiplexed Illuminators
Ramesh Raskar, Hideaki Nii, Bert deDecker, Yuki Hashimoto, Jay Summet, Dylan Moore, Yong Zhao, Jonathan Westhues, Paul Dietz, John Barnwell, Shree Nayar, Masahiko Inami, Philippe Bekaert, Michael Noland, Vlad Branzoi, Erich Bruns,
SIGGRAPH ( ACM Transactions on Graphics), 2007.
[PDF] [bib] [Project] [Video]
TRACKS: Toward Directable Thin Shells
Miklós Bergou, Saurabh Mathur, Max Wardetzky, and Eitan Grinspun,
SIGGRAPH (ACM Transactions on Graphics), 2007.
[PDF] [bib] [Project] [Video]
Conference
4D Compression and Relighting with High-Resolution Light Transport Matrices
Ewen Cheslack-Potava, Nolan Goodnight, Ren Ng, Ravi Ramamoorthi and Greg Humphreys,
ACM Symposium on Interactive 3D Graphics and Games, 2007.
[PDF] [bib] [Video]
A Real-time Beam Tracer with Application to Exact Soft Shadows
Ryan Overbeck, Ravi Ramamoorthi, and William R. Mark,
Eurographics Symposium on Rendering, 2007.
[PDF] [bib] [Video]
Dirty Glass: Rendering Contamination on Transparent Surfaces
Jinwei Gu, Ravi Ramamoorthi, Peter Belhumeur, Shree Nayar,
EuroGraphics Symposium on Rendering, 2007.
[PDF] [bib] [Project] [Video]
Material Based Splashing of Water Drops
Kshitiz Garg and Gurunandan Krishnan and Shree K. Nayar,
EuroGraphics Symposium on Rendering, 2007.
[PDF] [bib]
Scene Collages and Flexible Camera Arrays
Yoshikuni Nomura, Li Zhang, and Shree Nayar,
EuroGraphics Symposium on Rendering, 2007.
[PDF] [bib] [Project]
Viewpoint-Coded Structured Light
Mark Young, Erik Beeson, James Davis, Szymon Rusinkiewicz and Ravi Ramamoorthi,
IEEE Conference on Computer Vision and Pattern Recognition (CVPR), 2007.
[PDF] [bib]
Cubic Shells
Akash Garg, Eitan Grinspun, Max Wardetzky, Denis Zorin,
Symposium on Computer Animation, pp.91-98, 2007.
[PDF] [bib] [Video]
Discrete Laplace operators: No free lunch
Max Wardetzky, Saurabh Mathur, Felix Kälberer and Eitan Grinspun,
Symposium on Geometry Processing, pp.33-37, 2007.
[PDF] [bib]
PhD Thesis
Final-Placement BRDF Editing
Aner Ben-Artzi,
PhD Thesis, Department of Computer Science, Columbia University, 2007.
[PDF] [bib]
Technical Report
A note on the triangle-centered quadratic interpolation discretization of the shape operator
Jason Reisman, Eitan Grinspun, Denis Zorin,
Technical Report, Department of Computer Science, Columbia University and New York University, 2007.
[PDF] [bib]
2006

Book
Modeling Illumination Variation with Spherical Harmonics
Ravi Ramamoorthi,
Face Processing: Advanced Modeling Methods, pp.385-424, 2006.
[PDF] [bib]
Journal
Computing discrete shape operators on general meshes [Eurographics 2006 Best Paper, 3rd Place]
Eitan Grinspun, Yotam Gingold, Jason Reisman, Denis Zorin,
Eurographics (Computer Graphics Forum), pp.547-556, 2006.
[PDF] [bib]
Reflectance Sharing: Predicting Appearance from a Sparse Set of Images of a Known Shape
Todd Zickler, Ravi Ramamoorthi, Sebastian Enrique and Peter Belhumeur,
IEEE Transactions on Pattern Analysis and Machine Intelligence, pp.1287-1302, 2006.
[PDF] [bib] [Project] [Video]
Efficient Shadows from Sampled Environment Maps
Aner Ben-Artzi, Ravi Ramamoorthi and Maneesh Agrawala,
Journal of Graphics Tools, pp.13-36, 2006.
[PDF] [bib] [Project]
A Compact Factored Representation of Heterogeneous Subsurface Scattering
Pieter Peers, Karl vom Berge, Wojciech Matusik, Ravi Ramamoorthi, Jason Lawrence, Szymon Rusinkiewicz, and Philip Dutre,
SIGGRAPH ( ACM Transactions on Graphics), pp.746-753, 2006.
[PDF] [bib]
Acquiring Scattering Properties of Participating Media by Dilution
Srinivasa Narasimhan, Mohit Gupta, Craig Donner, Ravi Ramamoorthi, Shree Nayar and Henrik Jensen,
SIGGRAPH ( ACM Transactions on Graphics), pp.1003-1012, 2006.
[PDF] [bib]
Fast Separation of Direct and Global Components of a Scene using High-Frequency Illumination
Shree Nayar, Gurunandan Krishnan, Michael Grossberg and Ramesh Raskar,
SIGGRAPH ( ACM Transactions on Graphics), 2006.
[PDF] [bib] [Project] [Video]
Inverse Shade Trees for Non-Parametric Material Representation and Editing
Jason Lawrence, Aner Ben-Artzi, Christopher DeCoro, Wojciech Matusik, Hanspeter Pfister, Ravi Ramamoorthi, Szymon Rusinkiewicz,
SIGGRAPH ( ACM Transactions on Graphics), pp.735-745, 2006.
[PDF] [bib] [Project] [Video]
Multiview Radial Catadioptric Imaging for Scene Capture
Sujit Kuthirummal and Shree Nayar,
SIGGRAPH ( ACM Transactions on Graphics), 2006.
[PDF] [bib] [Project] [Video]
Photorealistic Rendering of Rain Streaks
Kshitiz Garg and Shree Nayar,
SIGGRAPH ( ACM Transactions on Graphics), 2006.
[bib] [Project]
Projection Defocus Analysis for Scene Capture and Image Display
Li Zhang and Shree Nayar,
SIGGRAPH ( ACM Transactions on Graphics), 2006.
[PDF] [bib] [Project] [Video]
Real-Time BRDF Editing in Complex Lighting
Aner Ben-Artzi, Ryan Overbeck and Ravi Ramamoorthi,
SIGGRAPH ( ACM Transactions on Graphics), pp.945-954, 2006.
[PDF] [bib] [Video]
Real-Time Soft Shadows in Dynamic Scenes using Spherical Harmonic Exponentiation
Zhong Ren, Rui Wang, John Snyder, Kun Zhou, Xinguo Liu, Bo Sun, Peter-Pike Sloan, Hujun Bao, Qunsheng Peng, and Baining Guo,
SIGGRAPH ( ACM Transactions on Graphics), 2006.
[PDF] [bib] [Project] [Video]
Time-Varying Surface Appearance: Acquisition, Modeling and Rendering
Jinwei Gu, Chien-I Tu, Ravi Ramamoorthi, Peter Belhumeur, Wojciech Matusik and Shree Nayar,
SIGGRAPH ( ACM Transactions on Graphics), pp.762-771, 2006.
[PDF] [bib] [Project] [Video]
Conference
Exploiting Temporal Coherence for Incremental All-Frequency Relighting
Ryan Overbeck, Aner Ben-Artzi, Ravi Ramamoorthi and Eitan Grinspun,
Eurographics Symposium on Rendering, 2006.
[PDF] [bib] [Video]
Time-Varying BRDFs
Bo Sun, Kalyan Sunkavalli, Ravi Ramamoorthi, Peter Belhumeur, and Shree Nayar,
Eurographics Workshop on Natural Phenomena, 2006.
[PDF] [bib] [Project] [Video]
A Theory of Spherical Harmonic Identities for BRDF/Lighting Transfer and Image Consistency
Dhruv Mahajan, Ravi Ramamoorthi and Brian Curless,
European Conference on Computer Vision, pp.41-55 (vol IV), 2006.
[PDF] [bib] [Project]
A Quadratic Bending Model for Inextensible Surfaces
Miklós Bergou, Max Wardetzky, David Harmon, Denis Zorin, and Eitan Grinspun,
Fourth Eurographics Symposium on Geometry Processing, pp.227-230, 2006.
[PDF] [bib] [Project] [Video]
Sim-X: Parallel System Software for Interactive Multi-Experiment Computational Studies
Siu-Man Yau, Eitan Grinspun, Vijay Karamcheti, and Denis Zorin,
International Parallel & Distributed Processing Symposium , 2006.
[PDF] [bib]
Discrete Shells Origami
Robert Burgoon, Eitan Grinspun, Zoë Wood,
Proceedings of Computers And Their Applications, pp.180-187, 2006.
[PDF] [bib]
Masters Thesis
Exploiting Temporal Coherence for Pre-computation Based Rendering
Ryan Overbeck,
Masters Thesis, Department of Computer Science, Columbia University, 2006.
[PDF] [bib]
2005

Journal
A Fourier Theory for Cast Shadows
Ravi Ramamoorthi, Melissa Koudelka and Peter Belhumeur,
IEEE Transactions on Pattern Analysis and Machine Intelligence, pp.288-295, 2005.
[PDF] [bib]
Spacetime Stereo: A Unifying Framework for Depth from Triangulation
James Davis, Diego Nehab, Ravi Ramamoorthi and Szymon Rusinkiewicz,
IEEE Transactions on Pattern Analysis and Machine Intelligence, pp.296-302, 2005.
[PDF] [bib] [Project]
A Practical Analytic Single Scattering Model for Real Time Rendering
Bo Sun, Ravi Ramamoorthi, Srinivasa Narasimhan and Shree Nayar,
SIGGRAPH ( ACM Transactions on Graphics), pp.1040-1049, 2005.
[PDF] [bib] [Project] [Video]
Efficiently Combining Positions and Normals for Precise 3D Geometry
Diego Nehab, Szymon Rusinkiewicz, James Davis and Ravi Ramamoorthi,
SIGGRAPH ( ACM Transactions on Graphics), pp.536-543, 2005.
[PDF] [bib] [Project]
Removing Photography Artifacts using Gradient Projection and Flash-Exposure Sampling
Amit Agarwal, Ramesh Raskar, Shree Nayar and Yuanzhen Li,
SIGGRAPH ( ACM Transactions on Graphics), pp.828-835, 2005.
[PDF] [bib]
Conference
Adaptive Numerical Cumulative Distribution Functions for Efficient Importance Sampling
Jason Lawrence, Szymon Rusinkiewicz and Ravi Ramamoorthi,
EuroGraphics Symposium on Rendering, pp.11-20, 2005.
[PDF] [bib]
Reflectance Sharing: Image-Based Rendering from a Sparse Set of Images
Todd Zickler, Sebastian Enrique, Ravi Ramamoorthi and Peter Belhumeur,
EuroGraphics Symposium on Rendering, 2005.
[PDF] [bib] [Project] [Video]
2004

Journal
A Signal-Processing Framework for Reflection
Ravi Ramamoorthi,
ACM Transactions on Graphics, pp.1004-1042, 2004.
[PDF] [bib]
Lighting sensitive display
Shree Nayar, Peter Belhumeur and Terry Boult ,
ACM Transactions on Graphics, pp.963-979, 2004.
[PDF] [bib] [Project] [Video]
Efficient BRDF Importance Sampling Using a Factored Representation
Jason Lawrence, Szymon Rusinkiewicz and Ravi Ramamoorthi,
SIGGRAPH ( ACM Transactions on Graphics), pp.494-503, 2004.
[PDF] [bib] [Project]
Eyes for Relighting
Ko Nishino and Shree Nayar ,
SIGGRAPH ( ACM Transactions on Graphics), pp.704-711, 2004.
[PDF] [bib] [Video]
Triple Product Wavelet Integrals for All-Frequency Relighting
Ren Ng, Ravi Ramamoorthi and Pat Hanrahan,
SIGGRAPH ( ACM Transactions on Graphics), pp.475-485, 2004.
[PDF] [bib] [Project] [Video]
Conference
Practical Rendering of Multiple Scattering Effects in Participating Media
Simon Premoze, Michael Ashikhmin, Jerry Tessendorf, Ravi Ramamoorthi and Shree Nayar,
EuroGraphics Symposium on Rendering, 2004.
[PDF] [bib]
A Fourier Theory for Cast Shadows
Ravi Ramamoorthi, Melissa Koudelka and Peter Belhumeur,
European Conference on Computer Vision (ECCV), pp.146-162 (vol 1), 2004.
[PDF] [bib]
Technical Report
A Discrete Model for Inelastic Deformation of Thin Shells
Yotam Gingold, Adrian Secord, Jefferson Y. Han, Eitan Grinspun, Denis Zorin,
Technical Report, Courant Institute of Mathematical Sciences, New York University, 2004.
[PDF] [bib] [Project]
2003

Journal
Natural Hierarchical Refinement for Finite Element Methods
Petr Krysl, Eitan Grinspun, and Peter Schröder,
International Journal for Numerical Methods in Engineering, pp.1109–1124, 2003.
[PDF] [bib]
All-Frequency Shadows Using Non-Linear Wavelet Lighting Approximation
Ren Ng, Ravi Ramamoorthi and Pat Hanrahan,
SIGGRAPH ( ACM Transactions on Graphics), pp.376-381, 2003.
[PDF] [bib] [Project] [Video]
Sparse Matrix Solvers on the GPU: Conjugate Gradients and Multigrid
Eitan Grinspun, Jeff Bolz, Ian Farmer, and Peter Schröder,
SIGGRAPH ( ACM Transactions on Graphics), pp.917-924, 2003.
[PDF] [bib] [Video]
Structured Importance Sampling of Environment Maps
Sameer Agarwal, Ravi Ramamoorthi, Serge Belongie and Henrik Jensen,
SIGGRAPH ( ACM Transactions on Graphics), pp.605-612, 2003.
[PDF] [bib] [Video]
Conference
Discrete Shells
Eitan Grinspun, Anil Hirani, Mathieu Desbrun and Peter Schröder,
ACM SIGGRAPH / Eurographics Symposium on Computer Animation, pp.62-67, 2003.
[PDF] [bib]
Spacetime Stereo: A Unifying Framework for Depth from Triangulation
James Davis, Ravi Ramamoorthi and Szymon Rusinkiewicz,
IEEE Conference on Computer Vision and Pattern Recognition (CVPR), pp.359-366 (vol 2), 2003.
[PDF] [bib] [Project]
Using Specularities for Recognition
Margarita Osadchy, David Jacobs and Ravi Ramamoorthi,
International Conference on Computer Vision, pp.1512-1519, 2003.
[PDF] [bib]
PhD Thesis
The Basis Refinement Method
Eitan Grinspun,
PhD Thesis, Caltech, 2003.
[PDF] [bib]
2002

Journal
Analytic PCA Construction for Theoretical Analysis of Lighting Variability, Including Attached Shadows, in a Single Image of a Convex Lambertian Object
Ravi Ramamoorthi,
IEEE Transactions on Pattern Analysis and Machine Intelligence, pp.1322-1333, 2002.
[PDF] [bib] [Project]
CHARMS: A Simple Framework for Adaptive Simulation
Eitan Grinspun, Petr Krysl and Peter Schröder,
SIGGRAPH ( ACM Transactions on Graphics), pp.281-290, 2002.
[PDF] [bib]
Frequency Space Environment Map Rendering
Ravi Ramamoorthi,
SIGGRAPH, ACM Transactions on Graphics, pp.517-526, 2002.
[PDF] [bib] [Project]
2001

Journal
Normal Bounds for Subdivision-Surface Interference Detection
Eitan Grinspun, Peter Schröder,
IEEE VIS '01: Proceedings of the conference on Visualization '01, pp.333-340, 2001.
[PDF] [bib]
On the relationship between Radiance and Irradiance: Determining the illumination from images of a convex Lambertian object
Ravi Ramamoorthi and Pat Hanrahan,
Journal of the Optical Society of America, pp.2448-2459, 2001.
[PDF] [bib] [Project]
A Signal-Processing Framework for Inverse Rendering
Ravi Ramamoorthi and Pat Hanrahan,
SIGGRAPH, pp.117-128, 2001.
[PDF] [bib] [Project]
An Efficient Representation for Irradiance Environment Maps
Ravi Ramamoorthi and Pat Hanrahan,
SIGGRAPH, pp.497-500, 2001.
[PDF] [bib] [Project] [Video]
Conference
Analysis of Planar Light Fields From Homogeneous Convex Curved Surfaces Under Distant Illumination
Ravi Ramamoorthi and Pat Hanrahan,
SPIE Proceedings of Human Vision and Electronic Imaging VI (part of Photonics West, 2001), pp.185-198, 2001.
[PDF] [bib] [Project]
2000

Journal
Efficient Image-Based Methods for Rendering Soft Shadows
Maneesh Agrawala, Ravi Ramamoorthi, Alan Heirich and Laurent Moll,
SIGGRAPH, pp.375-384, 2000.
[PDF] [bib] [Project]
1999

Journal
Creating Generative Models from Range Images
Ravi Ramamoorthi,
SIGGRAPH, pp.195-204, 1999.
[PDF] [bib] [Project]
Technical Report
Non-Linear Mechanics and Collisions for Subdivision Surfaces
Eitan Grinspun, Fehmi Cirak, Peter Schröder, and Michael Ortiz,
Technical Report, 1999.
[PDF] [bib]
1997

Journal
Fast Construction of Accurate Quaternion Splines
Ravi Ramamoorthi,
SIGGRAPH, pp.287-292, 1997.
[PDF] [bib] [Project]
Technical Report
Dynamic Splines with Constraints for Animation
Ravi Ramamoorthi,
Caltech CS-TR-97-03, 1997.
[PDF] [bib] [Project]
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Page Created: Jan 30, 2004 - Last Update: Aug 23, 2006 - Maintained by: Kevin Egan [ktegan@cs.columbia.edu]