Publications (Research & Teaching)

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2013
Adrian Ilie and Greg Welch, “On-line control of active camera networks for computer vision tasks,” to appear in Transactions on Sensor Networks, 2013.

2012
Arjun Nagendran, Remo Pillat, Charles Hughes, and Greg Welch. Continuum of virtual- human space: Towards improved interaction strategies for physical-virtual avatars. In Proceedings of 11th ACM SIGGRAPH International Conference on Virtual-Reality Continuum and its Applications in Industry (VRCAI 2012), IEEE, December 2012.
Ryan Schubert, Greg Welch, Peter Lincoln, Arjun Nagendran, Remo Pillat, and Henry Fuchs. Advances in shader lamps avatars for telepresence. In Proceedings of 3DTV-Conference 2012: The True Vision: Capture, Transmission and Display of 3D Video, (ETH Zurich, Zurich, Switzerland), October 15–17 2012.
Ning Zhou, Zhenyu Huang, Yulan Li, and Greg Welch. Local Sequential Ensemble Kalman Filter for Simultaneously Tracking States and Parameters, in Proceedings of 2012 North American Power Symposium, (Urbana-Champaign, IL USA), September 9–11 2012.

Greg Welch, Physical-virtual humans: Challenges and opportunities. In Ubiquitous Virtual Reality (ISUVR), 2012 International Symposium on, pp. 10–13, Aug. 2012.
Ning Zhou, Zhenyu Huang, Greg Welch, and Jinghe Zhang. Identifying the optimal measurement subspace for the ensemble kalman filter. IET Electronics Letters, vol. 48, no. 11, May 2012.
Diego Rivera-Gutierrez, Greg Welch, Peter Lincoln, Mary Whitton, Juan Cendan, David A. Chesnutt, Henry Fuchs, and Ben Lok. Shader lamps virtual patients: the physical representation of virtual patients. Medicine Meets Virtual Reality 19 - NextMed, Studies in Health Technology and Informatics, IOS Press, 2012.

2011
Greg Welch, Diego Rivera-Gutierrez, Peter Lincoln, Mary Whitton, Juan Cendan, David A. Chesnutt, Henry Fuchs, Ben Lok, and Rick Skarbez. Physical manifestations of virtual patients. Simulation in Healthcare, Volume 6, Issue 6, December, 2011.

Adrian Ilie and Greg Welch. On-Line Control of Active Camera Networks for Computer Vision Tasks. Proceedings of 5th ACM/IEEE International Conference on Distributed Smart Cameras, August 22–25, 2011. Awarded 2nd Prize Best ICDSC 2011 Paper.
Jinghe Zhang, Greg Welch, and Gary Bishop. LoDiM: A Novel Power System State Estimation Method with Dynamic Measurement Selection. In Proceedings of 2011 IEEE Power & Energy Society General Meeting, (Detroit, MI, USA), 26–29 July 2011.
Jinghe Zhang, Greg Welch, Gary Bishop, and Zhenyu Huang. Reduced Measurement-Space Dynamic State Estimation (REMEDYSE) for Power Systems. Proceedings of IEEE Trondheim PowerTech 2011 (Trondheim, Norway), 19–23 June 2011.
Jinghe Zhang, Greg Welch, and Gary Bishop. Power System State Estimation with Dynamic Optimal Measurement Selection. Proceedings of 2011 IEEE Symposium on Computational Intelligence Applications in Smart Grid, (Paris, France), 11–15 April 2011.
Peter Lincoln, Greg Welch, and Henry Fuchs. Continual Surface-Based Multi-Projector Blending for Moving Objects. Proceedings of the IEEE Virtual Reality 2011, pp. 115–118, (Singapore, Singapore), 19–23 March 2011.
Greg Welch, Diane H. Sonnenwald, Henry Fuchs, Bruce Cairns, M.D., Ketan Mayer-Patel, Ruigang Yang, Andrei State, Herman Towles, Adrian Ilie, Srinivas Krishnan, and Hanna M. Söderholm. Remote 3D Medical Consultation, in Virtual Realities: Dagstuhl Seminar 2008 (S. Coquillart, G. Brunnett, and G. Welch, eds.), Ch. 8, pp. 139–160, Springer, 2011.

2010
Peter Lincoln, Greg Welch, Andrew Nashel, Andrei State, Adrian Ilie, and Henry Fuchs. Animatronic Shader Lamps Avatars. Virtual Reality (Springer), special issue on Augmented Reality, pp. 1–14, 2010. This is an extended version of our ISMAR 2009 paper.
Jinghe Zhang, Greg Welch, Gary Bishop, and Zhenyu Huang. Optimal PMU Placement Evaluation for Power System Dynamic State Estimation. In Proceedings of IEEE PES Conference on Innovative Smart Grid Technologies Europe (ISGT 2010), Chalmers Lindholmen, Göteborg, Sweden, October 10–13, 2010.
Jinghe Zhang, Greg Welch, and Gary Bishop. Observability and Estimation Uncertainty Analysis for PMU Placement Alternatives. In Proceedings of the 2010 North American Power Symposium (NAPS 2010), Arlington, TX, U.S.A., September 26–28, 2010.

2009
Tyler Johnson, Herman Towles, Andrei State, Fu-Che Wu, Greg Welch, Anselmo Lastra, and Henry Fuchs. A Projector-based Physical Sand Table for Tactical Planning and Review. Technical Report TR09-017, University of North Carolina at Chapel Hill, Department of Computer Science, 2009.
Amela Sadagic, Greg Welch, Chumki Basu, Chris Darken, Rakesh Kumar, Henry Fuchs, Hui Cheng, Jan-Michael Frahm, Mathias Kolsch, Neil Rowe, Herman Towles, Juan Wachs, and Anselmo Lastra. New Generation of Instrumented Ranges: Enabling Automated Performance Analysis. In Proceedings of the 2009 Interservice/Industry Training, Simulation, and Education Conference (I/ITSEC-2009), Orlando, Florida, U.S.A., November 30–December 3 2009.
Peter Lincoln, Greg Welch, Andrew Nashel, Adrian Ilie, Andrei State, and Henry Fuchs. Animatronic Shader Lamps Avatars. Proceedings of 8th IEEE and ACM International Symposium on Mixed and Augmented Reality (ISMAR’09), October 19–22, 2009.
Hua Yang, Greg Welch, Jan-Michael. Frahm, and Marc Pollefeys. 3D Motion Segmentation Using Intensity Trajectory. Proceedings of the 9th Asian Conference on Computer Vision (ACCV 2009), September 23–27 2009.
Peter Lincoln, Andrew Nashel, Adrian Ilie, Herman Towles, Greg Welch, and Henry Fuchs. Multi-view lenticular display for group teleconferencing. proceedings of IMMERSCOM 2009, 27–29 May 2009.
Greg Welch, Diane H. Sonnenwald, Henry Fuchs, Bruce Cairns, Ketan Mayer-Patel, Hanna M. Söderholm, Ruigang Yang, Andrei State, Herman Towles, Adrian Ilie, Manoj K. Ampalam, Srinivas Krishnan, Vincent Noel, Michael Noland, and James E. Manning. 3D medical collaboration technology to enhance emergency healthcare. The Journal of Biomedical Discovery and Collaboration, 4:4, 2009.
Tyler Johnson, Greg Welch, Henry Fuchs, Eric Laforce, and Herman Towles. A Distributed Cooperative Framework for Continuous Multi-Projector Pose Estimation. proceedings of IEEE Virtual Reality 2009, Mar 14–18, 2009.
Greg Welch. HISTORY: The Use of the Kalman Filter for Human Motion Tracking in Virtual Reality. Presence: Teleoperators and Virtual Environments, 18(1), 2009.
Greg Welch and Larry Davis. Tracking for Training in Virtual Environments: Estimating the Pose of People and Devices for Simulation and Assessment. In J. Cohn, D. Nicholson, and D. Schmorrow, editors, The PSI Handbook of Virtual Environments for Training and Education: Developments for the Military and Beyond, chapter 30. Praeger Security International, 2008.

2008
Adrian Ilie, Greg Welch, and Marc Macenko. A Stochastic Quality Metric for Optimal Control of Active Camera Network Configurations for 3D Computer Vision Tasks. in Proceedings of ECCV 2008 workshop on Multi-camera and Multi-modal Sensor Fusion Algorithms and Applications, Marseille, France, October 18 2008. European Conference on Computer Vision (ECCV).
Guido Brunnett, Sabine Coquillart, and Greg Welch. 08231 Abstracts Collection—Virtual Realities. Dagstuhl Seminar Proceedings, Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, Germany, 2008.
Hanna M. Söderholm, Diane H. Sonnenwald, James E. Manning, Bruce Cairns, Greg Welch, and Henry Fuchs. Exploring the Potential of Video Technologies for Collaboration in Emergency Medical Care. Part II: Task Performance. Journal of the American Society for Information Science and Technology (JASIST), 59(14):2335–2349, 14 August 2008.
Diane H. Sonnenwald, Hanna M. Söderholm, James E. Manning, Bruce Cairns, Greg Welch, and Henry Fuchs. Exploring the Potential of Video Technologies for Collaboration in Emergency Medical Care. Part I: Information Sharing. Journal of the American Society for Information Science and Technology (JASIST), 59(14):2320–2334, 14 August 2008.
Brian Clipp, Rahul Raguram, Jan-Michael Frahm, Greg Welch, and Marc Pollefeys. A Mobile 3D City Reconstruction System. IEEE Virtual Reality 2008 workshop on Cityscapes, March 9, 2008, Reno, Nevada, USA.

2007
Marc Pollefeys, David Nister, Jan-Michael Frahm, Amir Akbarzadeh, Philippos Mordohai, Brian Clipp, Chris Engels, David Gallup, Seon Joo Kim, Paul Merrell, C. Salmi, Sudipta Sinha, Brad Talton, Liang Wang, Qing-Xiong Yang, Henrik Stewenius, Ruigang Yang, Greg Welch, and Herman Towles. Detailed Real-Time Urban 3D Reconstruction From Video. International Journal of Computer Vision (IJCV), special issue on “Modeling Large-Scale 3D Scenes. 2007.
Hanna M. Söderholm, Diane H. Sonnenwald, Bruce Cairns, James Manning, Greg Welch, and Henry Fuchs. The Potential Impact of 3D Telepresence Technology on Task Performance in Emergency Trauma Care. Proceedings of the ACM Group 2007 Conference, November 4–7 2007.
Brian Clipp, Greg Welch, Jan-Michael Frahm, and Marc Pollefeys, Structure From Motion via a Two-Stage Pipeline of Extended Kalman Filters. Proceedings of the British Machine Vision Conference (BMVC 2007), September 10–13 2007.
Hua Yang, Marc Pollefeys, Greg Welch, Jan-Michael Frahm, and Adrian Ilie. Differential Camera Tracking Through Linearizing the Local Appearance Manifold, in Proceedings of the 2007 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR' 07), 2007.
Philippos Mordohai, Jan-Michael Frahm, Amir Akbarzadeh, Brian Clipp, Chris Engels, David Gallup, Paul Merrell, Christina Salmi, Sudipta Sinha, Brad Talton, Liang Wang, Qing-Xiong Yang Yang, Henrik Stewénius, Herman Towles, Greg Welch, Ruigang Yang, Marc Pollefeys, and David Nistér. Real-Time Video-Based Reconstruction of Urban Environments, in Proceedings of the ISPRS Working Group V/4 Workshop 3D-ARCH 2007: 3D Virtual Reconstruction and Visualization of Complex Architectures, (ETH Zurich, Switzerland), July 12–13 2007.
Greg Welch, B. Danette Allen, Adrian Ilie, and Gary Bishop, Measurement Sample Time Optimization for Human Motion Tracking/Capture Systems. Proceedings of Trends and Issues in Tracking for Virtual Environments, Workshop at the IEEE Virtual Reality 2007 Conference (Charlotte, NC USA) (Gabriel Zachmann, ed.), Shaker, March 11 2007.
Greg Welch, Michael Noland, and Gary Bishop, Complementary Tracking and Two-Handed Interaction for Remote 3D Medical Consultation with a PDA. Proceedings of Trends and Issues in Tracking for Virtual Environments, Workshop at the IEEE Virtual Reality 2007 Conference (Charlotte, NC USA) (Gabriel Zachmann, ed.), Shaker, March 11 2007.

2006
Diane H. Sonnenwald, Hanna Maurin, Bruce Cairns, James Manning, Eugene Freid, Greg Welch, and Henry Fuchs. Experimental Comparison of the Use of 2D and 3D Telepresence Technologies in Distributed Emergency Medical Situations. In Proceedings of the American Society of Information Science and Technology (ASIS&T 2006), Austin, Texas, November 3-9, 2006.
Amir Akbarzadeh, Jan-Michael Frahm, Philippos Mordohai, Brian Clipp, Chris Engels, David Gallup, Paul Merrell, Michael Phelps, Sudipta Sinha, Brad Talton, Liang Wang, Qing-Xiong Yang, Henrik Stewenius, Ruigang Yang, Greg Welch, Herman Towles, David Nistér, and Marc Pollefeys. Towards Urban 3D Reconstruction From Video. In Proceedings of the Third International Symposium on 3D Data Processing, Visualization and Transmission (3DPVT 2006), Chapel Hill, NC, June 2006.
Hua Yang and Greg Welch. Illumination Insensitive Model-Based 3D Object Tracking and Texture Refinement. In Proceedings of the Third International Symposium on 3D Data Processing, Visualization and Transmission (3DPVT 2006), The University of North Carolina at Chapel Hill, Chapel Hill, NC USA, June 14-16, 2006.
Ruigang Yang, Liang Wang, Greg Welch, and Marc Pollefeys. Stereovision on GPU. In Proceedings of the 2006 Workshop on Edge Computing Using New Commodity Architectures (EDGE 2006), May 23-24 (Chapel Hill, NC, USA).
Greg Welch, Vincent Noel, Hua Yang, Andrei State, Adrian Ilie, Ruigang Yang, Marc Pollefeys, and Henry Fuchs. GPU-Based View Synthesis Using an Orbital Reconstruction Frustum. In Proceedings of the 2006 Workshop on Edge Computing Using New Commodity Architectures (EDGE 2006), May 23–24 (Chapel Hill, NC, USA).
Andrei State, Greg Welch, and Adrian Ilie. An Interactive Camera Placement and Visibility Simulator for Image-Based VR Applications. Proceedings of the Engineering Reality of Virtual Reality 2006 (3D Imaging, Interaction, and Measurement; IS&T/SPIE 18th Annual Symposium on Electronic Imaging Science and Technology), San Jose, CA, January 2006.

2005
Greg Welch, Henry Fuchs, Bruce Cairns, Ketan Mayer-Patel, Diane H. Sonnenwald, Ruigang Yang , Andrei State, Herman Towles, Adrian Ilie, Michael Noland, Vincent Noel, and Hua Yang. Improving, Expanding and Extending 3D Telepresence. In Proceedings of the 2005 International Workshop on Advanced Information Processing for Ubiquitous Networks, with ICAT 2005, Christchurch, New Zealand, December 8, 2005.
Hua Yang and Greg Welch. Model-Based 3D Object Tracking Using an Extended-Extended Kalman Filter and Graphics Rendered Measurements, in Proceedings of 1st Computer Vision for Interactive and Intelligent Environments (CV4IIE) workshop, University of Kentucky, Lexington, KY.
B. Danette Allen and Greg Welch. A General Method for Comparing the Expected Performance of Tracking and Motion Capture Systems, in Proceedings of 12th ACM Symposium on Virtual Reality Software and Technology (VRST), Monterey, California, November 2005.
Greg Welch, Diane Sonnenwald, Ketan Mayer-Patel, Ruigang Yang, Andrei State, Herman Towles, Bruce Cairns, and Henry Fuchs, Remote 3D Medical Consultation. Proceedings of BROADMED: 1st IEEE/CreateNet International Workshop on Telemedicine Over Broadband and Wireless Networks, (Boston, MA, USA), October 2005.
Adrian Ilie and Greg Welch. Ensuring Color Consistency Across Multiple Cameras. Proceedings of the International Conference on Computer Vision (ICCV), 2:1268-1275, October, 2005, in Beijing, China.
Greg Welch, Ruigang Yang, Sascha Becker, Adrian Ilie, Dan Russo, Jesse Funaro, Andrei State, Kok-Lim Low, Anselmo Lastra, Herman Towles, Bruce Cairns, M.D., Henry Fuchs, and Andy van Dam. Immersive Electronic Books for Surgical Training. IEEE Multimedia, 12(3):22–35, July–September 2005.

2004
Greg Welch, Ruigang Yang, Bruce Cairns, M.D., Herman Towles, Andrei State, Adrian Ilie, Sascha Becker, Dan Russo, Jesse Funaro, Diane Sonnenwald, Ketan Mayer-Patel,B. Danette Allen, Hua Yang, Eugene Freid, M.D., Andy van Dam, and Henry Fuchs. 3D Telepresence for Off-Line Surgical Training and On-Line Remote Consultation. Susumu Tachi, editor. Proceedings of ICAT CREST Symposium on Telecommunication, Teleimmersion, and Telexistence," The University of Tokyo, Tokyo, Japan, December 2004. Invited submission.
Adrian Ilie, Kok-Lim Low, Greg Welch, Anselmo Lastra, Henry Fuchs and Bruce Cairns (2004). Combining Head-Mounted and Projector-Based Displays for Surgical Training. Presence: Teleoperators and Virtual Environments 13(2). This is an extended version of our IEEE VR 2003 paper.
Ruigang Yang, Marc Pollefeys, Hua Yang, and Greg Welch (2004). A Unified Approach to Real-Time, Multi-Resolution, Multi-Baseline 2D View Synthesis and 3D Depth Estimation using Commodity Graphics Hardware, International Journal of Image and Graphics (IJIG), 4(4): 1-25.

2003
Ruigang Yang, Marc Pollefeys, and Greg Welch (2003). Dealing with Textureless Regions and Specular Highlights—A Progressive Space Carving Scheme Using a Novel Photo-consistency Measure, 9th International Conference on Computer Vision, October 13–16, Nice, France, IEEE Computer Society.

Kok-Lim Low, Adrian Ilie, Greg Welch, and Anselmo Lastra (2003). Combining Head-Mounted and Projector-Based Displays for Surgical Training. Proceedings of IEEE Virtual Reality 2003. Los Angeles, California. (March 22-26, 2003).
Ruigang Yang and Greg Welch. Real-time consensus-based scene reconstruction using commodity graphics hardware. Computer Graphics Forum (invited submission), 22(2):207-216, 2003.

2002

Andy van Dam, Henry Fuchs, Sascha Becker, Loring Holden, Adrian Ilie, Kok-Lim Low, Anne Morgan Spalter, Ruigang Yang, and Greg Welch (2002). Immersive Electronic Books for Teaching Surgical Procedures. Pre-ICAT CREST Symposium on Telecommunication, Teleimmersion, and Telexistence, December 3, 2002. The University of Tokyo, Tokyo, Japan. Invited submission.

Ruigang Yang and Greg Welch (2002). Fast Image Segmentation and Smoothing Using Commodity Graphics Hardware, Journal of Graphics Tools, special issue on Hardware-Accelerated Rendering Techniques, 7(4):91-100.

Greg Welch and Eric Foxlin (2002). Motion Tracking: No Silver Bullet, but a Respectable Arsenal, IEEE Computer Graphics and Applications, special issue on Tracking, November/December 2002, 22(6): 24–38. Invited submission.
Ruigang Yang and Greg Welch, Gary Bishop (2002). Real-Time Consensus-Based Scene Reconstruction using Commodity Graphics Hardware. Proceedings of Pacific Graphics 2002. Tsinghua University, Beijing, China (October 9-11, 2002). 
Rich Superfine, Gary Bishop, Jeremy Cummings, Jay Fisher, Kurtis Keller, G. Matthews, D. Sill, Russell M. Taylor II, Leandra Vicci, Chris Weigle, Greg Welch and Benjamin Wilde (August 4-8, 2002) "Touching In Biological Systems: A 3D Force Microscope." MSA—Microscopy and Microanalysis 2002, Quebec City, Canada. published in Proceedings of MSA—Microscopy and Microanalysis 2002.

2001
Kok-Lim Low, Greg Welch, Anselmo Lastra, and Henry Fuchs (2001). Life-Sized Projector-Based Dioramas. Proceedings of the ACM Symposium on Virtual Reality Software and Technology. Banff Cantre, Banff, Alberta, Canada (November 15-17, 2001), ACM SIGGRAPH, Addison-Wesley.
Greg Welch and Gary Bishop. An Introduction to the Kalman Filter, SIGGRAPH 2001 course 8. In Computer Graphics, Annual Conference on Computer Graphics & Interactive Techniques. ACM Press, Addison-Wesley, Los Angeles, CA, USA (August 12–17), SIGGRAPH 2001 course pack edition, 2001. (The course slides are also available.)
Bonnie Danette Allen, Gary Bishop, and Greg Welch. Tracking: Beyond 15 Minutes of Thought, SIGGRAPH 2001 course 11. In Computer Graphics, Annual Conference on Computer Graphics & Interactive Techniques. ACM Press, Addison-Wesley, Los Angeles, CA, USA (August 12–17), SIGGRAPH 2001 course pack edition, 2001. (The course slides are also available.)
Ramesh Raskar, Greg Welch, Kok-Lim Low, and Deepak Bandyopadhyay (2001). Shader Lamps: Animating Real Objects With Image-Based Illumination. Rendering Techniques 2001, Proceedings of the Eurographics Workshop in London, United Kingdom. S. J. Gortler and K. Myszkowski. University College London (UCL), London, England, Springer, NewYork: 89-102.
Aditi Majumder and Greg Welch (2001). COMPUTER GRAPHICS OPTIQUE: Optical Superposition of Projected Computer Graphics, Fifth Immersive Projection Technology Workshop, in conjunction with the Seventh Eurographics Workshop on Virtual Environments, May 16-18, Stuttgart, Germany, Springer-Verlag.
Ruigang Yang and Greg Welch (2001). Automatic and Continuous Projector Display Surface Estimation Using Every-Day Imagery. 9th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision 2001. Plzen, Czech Republic.
Greg Welch, Gary Bishop, Leandra Vicci, Stephen Brumback, Kurtis Keller, and D'nardo Colucci (2001). High-Performance Wide-Area Optical Tracking: The HiBall Tracking System. Presence: Teleoperators and Virtual Environments 10(1): 1-21.

2000
Aditi Majumder, Zhu He, Herman Towles, and Greg Welch (2000). Achieving color uniformity across multi-projector displays.” Proceedings of the conference on Visualization ’00, VIS ’00, (Los Alamitos, CA, USA), pp. 117–124, IEEE Computer Society Press, 2000. See also the JPG Color Plate and the movie.
Wei-Chao Chen, Herman Towles, Lars Nyland, Greg Welch, and Henry Fuchs (2000). Toward a Compelling Sensation of Telepresence: Demonstrating a portal to a distant (static) office. Proceedings of IEEE Visualization 2000. Salt Lake City, UT, USA (October 8 - 13), IEEE Computer Science Press. See also the movie.
Greg Welch, Henry Fuchs, Ramesh Raskar, Michael Brown, and Herman Towles (2000). Projected Imagery In Your Office in the Future, IEEE Computer Graphics and Applications, July/August 2000: 62-67.
Gary Bishop and Greg Welch (2000). Working in the Office of 'Real Soon Now', IEEE Computer Graphics and Applications, July/August 2000: 76-78.

1999
Greg Welch, Gary Bishop, Leandra Vicci, Stephen Brumback, Kurtis Keller, and D'nardo Colucci (1999). The HiBall Tracker: High-Performance Wide-Area Tracking for Virtual and Augmented Environments. Proceedings of the ACM Symposium on Virtual Reality Software and Technology. University College London, London, United Kingdom (December 20 - 23), ACM SIGGRAPH, Addison-Wesley: 1-11. Best paper designation. 
Ramesh Raskar, Greg Welch, and Wei-Chao Chen (1999). Table-Top Spatially-Augmented Reality: Bringing Physical Models to Life with Projected Imagery, Second International Workshop on Augmented Reality (IWAR'99), October 20-21, San Francisco, CA, USA.
Ramesh Raskar, Michael Brown, Ruigang Yang, Wei-Chao Chen, Greg Welch, Herman Towles, Brent Seales, and Henry Fuchs (1999). Mutli-Projector Displays Using Camera-Based Registration. Proceedings of the Conference on Visualization 99: Celebrating Ten Years. San Francisco, CA, USA (October 24 - 29): 161-168.
Brent Seales, Greg Welch, and Chris Jaynes (1999). Real-Time Depth Warping for 3-D Scene Reconstruction, 1999 IEEE Aerospace Conference, March 6-13, Snowmass at Aspen, CO USA. 

1998
Ramesh Raskar, Greg Welch, and Henry Fuchs (1998). Seamless Projection Overlaps Using Warping and Intensity Blending, Fourth International Conference on Virtual Systems and Multimedia (VSMM), November 18-20, Gifu, Japan.
Ramesh Raskar, Greg Welch, and Henry Fuchs (1999). Spatially Augmented Reality, Augmented Reality; Placing Artificial Objects in Real Scenes—Proceedings of the First IEEE Workshop on Augmented Reality (IWAR'98). R. Behringer, G. Klinker and D. Mizell. San Francisco, CA, USA (November 1, 1998), A.K. Peters Ltd. 
Ronald T. Azuma, Bruce R. Hoff, Howard E. Neely, III, Ronald Sarfaty, Michael J. Daily, Gary Bishop, Vernon Chi, Greg Welch, Ulrich Neumann, Suya You, Rich Nichols, and Jim Cannon (1998). Making Augmented Reality Work Outdoors Requires Hybrid Tracking, First International Workshop on Augmented Reality, November 1, San Francisco, CA, USA.
Ramesh Raskar, Greg Welch, Matt Cutts, Adam Lake, Lev Stesin, and Henry Fuchs (1998). The Office of the Future: A Unified Approach to Image-Based Modeling and Spatially Immersive Displays, Computer Graphics. M. F. Cohen. Orlando, FL, USA (July 19 - 24), ACM Press, Addison-Wesley: 179-188.
Ramesh Raskar, Henry Fuchs, Greg Welch, Adam Lake, and Matt Cutts (1998). 3D Talking Heads: Image Based Modeling at Interactive Rates using Structured Light Projection, University of North Carolina at Chapel Hill, Department of Computer Science, Chapel Hill, NC, USA. TR98-017. 
Ramesh Raskar, Matthew Cutts, Greg Welch, and Wolfgang Stüerzlinger (1998). Efficient Image Generation for Multiprojector and Multisurface Displays. Proceedings of the Eurographics Workshop in Vienna, Austria. G. Drettakis and N. Max. Vienna, Austria (June 29 - July 1), Springer Verlag: 139-144.

1997
Greg Welch and Gary Bishop (1997). SCAAT: Incremental Tracking with Incomplete Information, Computer Graphics. T. Whitted. Los Angeles, CA, USA (August 3 - 8), ACM Press, Addison-Wesley: 333-344.

1996
Greg Welch (1996). SCAAT: Incremental Tracking with Incomplete Information, Chapel Hill, NC USA, University of North Carolina at Chapel Hill: 207 leaves.

1995
Greg Welch (1995). Hybrid Self-Tracker: An Inertial/Optical Hybrid Three-Dimensional Tracking System, University of North Carolina at Chapel Hill, Department of Computer Science, Chapel Hill, NC, USA. TR95-048.
Greg Welch and Gary Bishop (1995). An Introduction to the Kalman Filter, University of North Carolina at Chapel Hill, Department of Computer Science, Chapel Hill, NC, USA. TR95-041. The article has also been translated into Chinese by Xuchen Yao, a student at The Institute of Acoustics of The Chinese Academy of Sciences. (Local copy here.) See also our Kalman filter web site.
Greg Welch (1995). A Survey of Power Management Techniques in Mobile Computing Operating Systems, ACM Operating Systems Review (SIGOPS-OSR) 29(4): 47-56.

Dissertation

Title:   SCAAT: Incremental Tracking with Incomplete Information
Date: October 1996
Advisor: Gary Bishop
Committee: Gary Bishop, Henry Fuchs, Leandra Vicci (née Vernon Chi), Anselmo Lastra, Russell Taylor, and John Poulton
PDF: http://www.cs.unc.edu/~welch/media/pdf/scaat_dissertation.pdf

Patents

Last updated Thu, Feb 21, 2013