Published Papers

CGF

Robo-Saber: Generating and Simulating Virtual Reality Players

Nam Hee Kim, Jingjing May Liu, Jaakko Lehtinen, Perttu Hämäläinen, James F. O'Brien, Xue Bin Peng

SePAR 2024

Effect of Data Degradation on Motion Re-Identification

Vivek Nair, Mark Roman Miller, Rui Wang, Brandon Huang, Christian Rack, Marc Latoschik, James F. O'Brien

SePAR 2024

Effect of Duration and Delay on the Identifiability of VR Motion

Mark Miller, Vivek Nair, Eugy Han, Cyan DeVeaux, Christian Rack, Rui Wang, Brandon Huang, Marc Latoschik, James F. O'Brien, Jeremy N. Bailenson

IEEE VR3D

Inferring Private Personal Attributes of Virtual Reality Users from Ecologically Valid Head and Hand Motion Data

Vivek Nair, Christian Rack, Wenbo Guo, Rui Wang, Shuixian Li, Brandon Huang, Atticus Cull, James F. O'Brien, Marc Latoschik, Louis Rosenberg, Dawn Song

IEEE VR3D

Deep Motion Masking for Secure, Usable, and Scalable Real-Time Anonymization of Ecological Virtual Reality Motion Data

Vivek Nair, Wenbo Guo, James F. O'Brien, Louis Rosenberg, Dawn Song

IEEE VR 2024

Berkeley Open Extended Reality Recordings 2023 (BOXRR-23): 4.7 Million Motion Capture Recordings from 105,000 XR Users

Vivek Nair, Wenbo Guo, Rui Wang, James F. O'Brien, Louis Rosenberg, Dawn Song

IEEE S&P

Truth in Motion: The Unprecedented Risks and Opportunities of Extended Reality Motion Data

Vivek Nair, Louis Rosenberg, James F. O'Brien, Dawn Song

USENIX Security 23

Unique Identification of 50,000+ Virtual Reality Users from Head and Hand Motion Data

Vivek Nair, Wenbo Guo, Justus Mattern, Rui Wang, James F. O'Brien, Louis Rosenberg, Dawn Song

PoPETS 2023

Exploring the Privacy Risks of Adversarial VR Game Design

Vivek Nair, Gonzalo Munilla Garrido, Dawn Song, James F. O'Brien

RHOBIN 2023

KBody: Towards general, robust, and aligned monocular whole-body estimation

Nikolaos Zioulis, James F. O'Brien

CVFAD 2023

KBody: Balanced monocular whole-body estimation

Nikolaos Zioulis, James F. O'Brien

Survey

Results of the 2023 Census of Beat Saber Users: Virtual Reality Gaming Population Insights and Factors Affecting Virtual Reality E-Sports Performance

Vivek Nair, Viktor Radulov, James F. O'Brien

SCA 2022

Monocular Facial Performance Capture Via Deep Expression Matching

Stephen Bailey, Jérémy Riviere, Morten Mikkelsen, James F. O'Brien

Misinformation Review

This photograph has been altered: Testing the effectiveness of image forensic labeling on news image credibility

Cuihua Shen, Mona Kasra, James F. O'Brien

SIGGRAPH 2020

Fast and Deep Facial Deformations

Stephen Bailey, Dalton Omens, Paul Dilorenzo, James F. O'Brien

New Media and Society

Fake images: The effects of source, intermediary, and digital media literacy on contextual assessment of imag credibility online

Cuihua Shen, Mona Kasra, Wenjing Pan, Grace A. Bassett, Yining Malloch, James F. O'Brien

SIGGRAPH 2018

Fast and Deep Deformation Approximations

Stephen Bailey, Dave Otte, Paul Dilorenzo, James F. O'Brien

EGSR 2018

Approximate {svBRDF} Estimation From Mobile Phone Video

Rachel A. Albert, Dorian Yao Chan, Dan B Goldman, James F. O'Brien

CHI 2018

Seeing Is Believing: How People Fail to Identify Fake Images on the Web

Mona Kasra, Cuihua Shen, James F. O'Brien

SSRD 2017

Simulation of Subseismic Joint and Fault Networks Using a Heuristic Mechanical Model

Paul Gillespie, Giulio Casini, Hayley Iben, James F. O'Brien

AoIR 2016

Seeing Is Believing: Do People Fail to Identify Fake Images on the Web?

Mona Kasra, Cuihua Shen, James F. O'Brien

SCA 2016

Repurposing Hand Animation for Interactive Applications

Stephen Bailey, Martin Watt, James F. O'Brien

MIG 2015

Interactive Detailed Cutting of Thin Sheets

Pierre-Luc Manteaux, Wei-Lun Sun, Francois Faure, Marie-Paule Cani, James F. O'Brien

TVCG 2015

View-Dependent Adaptive Cloth Simulation with Buckling Compensation

Woojong Koh, Rahul Narain, James F. O'Brien

SIGGRAPH 2015

Optimal Presentation of Imagery with Focus Cues on Multi-Plane Displays

Rahul Narain, Rachel A. Albert, Abdullah Bulbul, Gregory J. Ward, Marty Banks, James F. O'Brien

SCA 2015 Poster

Resampling Adaptive Cloth Simulations onto Fixed-Topology Meshes

George Brown, Armin Samii, James F. O'Brien, Rahul Narain

TOG 2014

Exposing Photo Manipulation from Shading and Shadows

Eric Kee, James F. O'Brien, Hany Farid

VSS 2014

Correct blur and accommodation information is a reliable cue to depth ordering.

Marina Zannoli, Rachel A. Albert, Abdullah Bulbul, Rahul Narain, James F. O'Brien, Martin Banks

VSS 2014

The Perception of Surface Material from Disparity and Focus Cues

Martin Banks, Abdullah Bulbul, Rachel Albert, Rahul Narain, James F. O'Brien, Gregory Ward

VSS 2014

Can 3D Shape be Estimated from Focus Cues Alone?

Rachel A. Albert, Abdullah Bulbul, Rahul Narain, James F. O'Brien, Martin S. Banks

SIGGRAPH 2014

Self-Refining Games using Player Analytics

Matt Stanton, Ben Humberston, Brandon Kase, James F. O'Brien, Kayvon Fatahalian, Adrien Treuille

SIGGRAPH 2014

Adaptive Tearing and Cracking of Thin Sheets

Tobias Pfaff, Rahul Narain, Juan Miguel de Joya, James F. O'Brien

SCA 2014

View-Dependent Adaptive Cloth Simulation

Woojong Koh, Rahul Narain, James F. O'Brien

SIGGRAPH Asia 2013

Fast Simulation of Mass-Spring Systems

Tiantian Liu, Adam Bargteil, James F. O'Brien, Ladislav Kavan

TOG 2013

Exposing Photo Manipulation with Inconsistent Shadows

Eric Kee, James F. O'Brien, Hany Farid

SIGGRAPH 2013

Folding and Crumpling Adaptive Sheets

Rahul Narain, Tobias Pfaff, James F. O'Brien

SIGGRAPH 2013

Near-exhaustive Precomputation of Secondary Cloth Effects

Doyub Kim, Woojong Koh, Rahul Narain, Kayvon Fatahalian, Adrien Treuille, James F. O'Brien

TOG 2013

Simulating Liquids and Solid-Liquid Interactions with Lagrangian Meshes

Pascal Clausen, Martin Wicke, Jonathan Shewchuk, James F. O'Brien

SIGGRAPH Asia 2012

Adaptive Anisotropic Remeshing for Cloth Simulation

Rahul Narain, Armin Samii, James F. O'Brien

TOG 2012

Updated Sparse Cholesky Factors for Corotational Elastodynamics

Florian Hecht, Yeon Jin Lee, Jonathan Shewchuk, James F. O'Brien

TIFS 2012

Exposing Digital Forgeries in Ballistic Motion

Valentina Conotter, James F. O'Brien, Hany Farid

TOG 2012

Exposing Photo Manipulation with Inconsistent Reflections

James F. O'Brien, Hany Farid

SIGGRAPH 2011

Data-Driven Elastic Models for Cloth: Modeling and Measurement

Huamin Wang, Ravi Ramamoorthi, James F. O'Brien

SIGGRAPH 2011

Perceptually Based Tone Mapping for Low-Light Conditions

Adam Kirk, James F. O'Brien

ICRA 2011

Modeling and Perception of Deformable One-Dimensional Objects

Shervin Javdani, Sameep Tandon, Jie Tang, James F. O'Brien, Pieter Abbeel

ICRA 2011

Bringing Clothing into Desired Configurations with Limited Perception

Marco Cusumano-Towner, Arjun Singh, Stephen Miller, James F. O'Brien, Pieter Abbeel

SIGGRAPH Asia 2010

Multi-Resolution Isotropic Strain Limiting

Huamin Wang, James F. O'Brien, Ravi Ramamoorthi

SIGGRAPH 2010

Dynamic Local Remeshing for Elastoplastic Simulation

Martin Wicke, Daniel Ritchie, Bryan Klingner, Sebastian Burke, Jonathan Shewchuk, James F. O'Brien

SIGGRAPH 2010

Example-Based Wrinkle Synthesis for Clothing Animation

Huamin Wang, Florian Hecht, Ravi Ramamoorthi, James F. O'Brien

TOG 2010

Using Blur to Affect Perceived Distance and Size

Robert (Robin) Held, Emily Cooper, James F. O'Brien, Marty Banks

ABS 2010

Simulation of Needle Insertion and Tissue Deformation for Modeling Prostate Brachytherapy

Nuttapong Chentanez, Ron Alterovitz, Daniel Ritchie, Lita Cho, Kris Hauser, Ken Goldberg, Jonathan Shewchuk, James F. O'Brien

SCA 2009

Real-Time Deformation and Fracture in a Game Environment

Eric G. Parker, James F. O'Brien

SIGGRAPH 2009

Interactive Simulation of Surgical Needle Insertion and Steering

Nuttapong Chentanez, Ron Alterovitz, Daniel Ritchie, Lita Cho, Kris Hauser, Ken Goldberg, Jonathan Shewchuk, James F. O'Brien

DCG

Refolding Planar Polygons

Hayley Iben, James F. O'Brien, Erik Demaine

Graphical Models

Generating Surface Crack Patterns

Hayley Iben, James F. O'Brien

VSS 2008

Making Big Things Look Small: Blur combined with other depth cues affects perceived size and distance

Robert (Robin) Held, Emily Cooper, James F. O'Brien, Marty Banks

SCA 2007

Liquid Simulation on Lattice-Based Tetrahedral Meshes

Nuttapong Chentanez, Bryan Feldman, François Labelle, James F. O'Brien, Jonathan Shewchuk

GI 2007

A Method for Cartoon-Style Rendering of Liquid Animations

Ashley M. Eden, Adam Bargteil, Tolga Goktekin, Sara Beth Eisinger, James F. O'Brien

J. Medical Physics

Optimization of HDR brachytherapy dose distributions using linear programming with penalty costs

Ron Alterovitz, Etienne Lessard, Jean Pouliot, I-Chow Joe Hsu, James F. O'Brien, Ken Goldberg

SCA 2006

Generating Surface Crack Patterns

Hayley Iben, James F. O'Brien

SCA 2006

A Texture Synthesis Method for Liquid Animations

Adam Bargteil, Funshing Sin, Jonathan E. Michaels, Tolga Goktekin, James F. O'Brien

SIGGRAPH 2006

Fluid Animation with Dynamic Meshes

Bryan Klingner, Bryan Feldman, Nuttapong Chentanez, James F. O'Brien

SCA 2006

Simultaneous Coupling of Fluids and Deformable Bodies

Nuttapong Chentanez, Tolga Goktekin, Bryan Feldman, James F. O'Brien

SIGGRAPH 2006 Tech Sketch

Simultaneous Coupling of Fluids and Deformable Bodies

Nuttapong Chentanez, Tolga Goktekin, Bryan Feldman, James F. O'Brien

SIGGRAPH 2006 Tech Sketch

A Texture Synthesis Method for Liquid Animations

Adam Bargteil, Funshing Sin, Jonathan Michaels, James F. O'Brien

SoCG 2006

Refolding Planar Polygons

Hayley Iben, James F. O'Brien, Erik Demaine

Foundations and Trends

Computational Studies of Human Motion: Tracking and Motion Synthesis

David Forsyth, Okan Arikan, Leslie Ikemoto, James F. O'Brien, Deva Ramanan

ACM Trans. Graphics

A semi-Lagrangian contouring method for fluid simulation

Adam Bargteil, Tolga Goktekin, James F. O'Brien, John A. Strain

SIGGRAPH 2005

Animating Gases with Hybrid Meshes

Bryan Feldman, James F. O'Brien, Bryan Klingner

SCA 2005

Fluids in Deforming Meshes

Bryan Feldman, James F. O'Brien, Bryan Klingner, Tolga Goktekin

SCA 2005

Pushing People Around

Okan Arikan, David Forsyth, James F. O'Brien

SIGGRAPH 2005

Fast and Detailed Approximate Global Illumination by Irradiance Decomposition

Okan Arikan, David A. Forsyth, James F. O'Brien

CVPR 2005

Skeletal Parameter Estimation from Optical Motion Capture Data

Adam Kirk, James F. O'Brien, David Forsyth

SIGGRAPH 2005 Tech Sketch

A semi-Lagrangian contouring method for fluid simulation

Adam Bargteil, Tolga Goktekin, James F. O'Brien, John A. Strain

SIGGRAPH 2004

Interpolating and Approximating Implicit Surfaces from Polygon Soup

Chen Shen, James F. O'Brien, Jonathan Shewchuk

SIGGRAPH 2004 Tech Sketch

Skeletal Parameter Estimation from Optical Motion Capture Data

Adam Kirk, James F. O'Brien, David Forsyth

SIGGRAPH 2004 Tech Sketch

Refolding Planar Polygons

Hayley Iben, James F. O'Brien, Erik Demaine

SIGGRAPH 2004 Tech Sketch

Radiance Caching and Local Geometry Correction

Okan Arikan, David A. Forsyth, James F. O'Brien

SGP 2004

Spectral Surface Reconstruction from Noisy Point Clouds

Ravi Kolluri, Jonathan Shewchuk, James F. O'Brien

SoCG 2004

An Energy-Driven Approach to Linkage Unfolding

Jason Cantarella, Erik Demaine, Hayley Iben, James F. O'Brien

SIGGRAPH 2004

A Method for Animating Viscoelastic Fluids

Tolga Goktekin, Adam Bargteil, James F. O'Brien

SIGGRAPH 2003

Animating Suspended Particle Explosions

Bryan Feldman, James F. O'Brien, Okan Arikan

SIGGRAPH 2003

Motion Synthesis from Annotations

Okan Arikan, David Forsyth, James F. O'Brien

SIGGRAPH 2003 Tech Sketch

Spectral Watertight Surface Reconstruction

Ravi Kolluri, Jonathan Shewchuk, James F. O'Brien

Graphics Interface 2003

Interactive Deformation Using Modal Analysis with Constraints

Kris Hauser, Chen Shen, James F. O'Brien

DIMACS 2002

An Energy-Driven Approach to Linkage Unfolding

Jason Cantarella, Erik Demaine, Hayley Iben, James F. O'Brien

TOG

Modelling with Implicit Surfaces that Interpolate

Greg Turk, James F. O'Brien

SIGGRAPH 2002

Graphical Modeling and Animation of Ductile Fracture

James F. O'Brien, Adam Bargteil, Jessica Hodgins

SIGGRAPH 2002 Tech Sketch

Modal Analysis for Real-Time Viscoelastic Deformation

Chen Shen, Kris Hauser, Christine Gatchalian, James F. O'Brien

SCA 2002

Synthesizing sounds from rigid-body simulations

James F. O'Brien, Chen Shen, Christine Gatchalian

SIGGRAPH 2002 Tech Sketch

Modeling the Accumulation of Wind-Driven Snow

Bryan Feldman, James F. O'Brien

SIGGRAPH 2001 Tech Sketch

Image Based Rendering and Illumination Using Spherical Mosaics

Chen Shen, Heung-Yeung Shum, James F. O'Brien

SIGGRAPH 2001

Synthesizing Sounds from Physically Based Motion

James F. O'Brien, Perry R. Cook, Georg Essl

Shape Modeling International 2001

Implicit Surfaces that Interpolate

Greg Turk, GHuong Quynh Dinh, James F. O'Brien, Gary Yngve

SIGGRAPH 2000

Animating Explosions

Gary D. Yngve, James F. O'Brien, Jessica K. Hodgins

CACM

Animating Fracture

James F. O'Brien, Jessica Hodgins

GI 2000

Automatic Joint Parameter Estimation from Magnetic Motion Capture Data

James F. O'Brien, Robert Bodenheimer, Gabriel Brostow, Jessica Hodgins

CG&A

Combining Active and Passive Simulations for Secondary Motion

James F. O'Brien, Victor Zordan, Jessica Hodgins

SIGGRAPH 1999

Shape Transformation Using Variational Implicit Functions

James F. O'Brien, Greg Turk

SIGRAPH 1999

Graphical Modeling and Animation of Brittle Fracture

James F. O'Brien, Jessica Hodgins

CGF

Animating Sand, Mud, and Snow

Robert Sumner, James F. O'Brien, Jessica Hodgins

TVCG 1998

Perception of Human Motion with Different Geometric Models

Jessica Hodgins, James F. O'Brien, Jack Tumblin

GI 98

Animating Sand, Mud, and Snow

Robert Sumner, James F. O'Brien, Jessica Hodgins

SIGGRAPH 1997 Tech Sketch

Combining Active and Passive Simulations for Secondary Motion

James F. O'Brien, Victor Zordan, Jessica Hodgins

GI 97

Do Geometric Models Affect Judgments of Human Motion?

Jessica Hodgins, James F. O'Brien, Jack Tumblin

SIGGRAPH 1995

Animating Human Athletics

Jessica Hodgins, Wayne Wooten, David Brogan, James F. O'Brien

Computer Animation 95

Dynamic Simulation of Splashing Fluids

James F. O'Brien, Jessica Hodgins