Dr. Gregory F. Welch – Publications

@incollection{Raskar2001,

title = {Shader Lamps: Animating Real Objects With Image-Based Illumination},

author = {Ramesh Raskar and Greg Welch and Kok-Lim Low and Deepak Bandyopadhyay},

editor = {S. J. Gortler and K. Myszkowski},

url = {https://sreal.ucf.edu/wp-content/uploads/2017/02/Raskar2001.pdf},

year  = {2001},

date = {2001-01-01},

booktitle = {Rendering Techniques 2001, Proceedings of the Eurographics Workshop in London, United Kingdom},

pages = {89-102},

publisher = {Springer, NewYork},

address = {University College London (UCL), London, England},

abstract = {We describe a new paradigm for three-dimensional computer graphics, using projectors to graphically animate physical objects in the real world. The idea is to replace a physical objectwith its inherent color, texture, and material propertieswith a neutral object and projected imagery, reproducing the original (or alternative) appearance directly on the object. Because the approach is to effectively lift the visual properties of the object into the projector, we call the projectors shader lamps. We address the central issue of complete and continuous illumination of non-trivial physical objects using multiple projectors and present a set of new techniques that makes the process of illumination practical. We demonstrate the viability of these techniques through a variety of table-top applications, and describe preliminary results to reproduce life-sized virtual spaces.},

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pubstate = {published},

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}

@incollection{Welch2001,

title = {An Introduction to the Kalman filter: SIGGRAPH 2001 Course 8},

author = {Greg Welch and Gary Bishop},

url = {https://sreal.ucf.edu/wp-content/uploads/2017/02/Welch2001.pdf},

year  = {2001},

date = {2001-01-01},

booktitle = {Computer Graphics},

publisher = {ACM Press, Addison-Wesley},

address = {Los Angeles, CA, USA (August 12-17)},

edition = {SIGGRAPH 2001 Course Pack},

series = {Annual Conference on Computer Graphics & Interactive Techniques},

keywords = {},

pubstate = {published},

tppubtype = {incollection}

}

@incollection{Chen2000,

title = {Toward a Compelling Sensation of Telepresence: Demonstrating a Portal to a Distant (Static) Office},

author = {Wei-Chao Chen and Herman Towles and Lars Nyland and Greg Welch and Henry Fuchs},

url = {https://sreal.ucf.edu/wp-content/uploads/2017/02/Chen2000.pdf},

year  = {2000},

date = {2000-01-01},

booktitle = {Proceedings of IEEE Visualization 2000},

publisher = {IEEE Computer Science Press},

address = {Salt Lake City, UT, USA (October 8 - 13)},

keywords = {},

pubstate = {published},

tppubtype = {incollection}

}

@incollection{Raskar1999a,

title = {Mutli-Projector Displays Using Camera-Based Registration},

author = {Ramesh Raskar and Michael Brown and Ruigang Yang and Wei-Chao Chen and Greg Welch and Herman Towles and Brent Seales and Henry Fuchs },

url = {https://sreal.ucf.edu/wp-content/uploads/2017/02/Raskar1999a.pdf},

year  = {1999},

date = {1999-01-01},

booktitle = {Proceedings of the Conference on Visualization 99: Celebrating Ten Years},

pages = {161-168},

address = {San Francisco, CA, USA (October 24 - 29)},

series = {IEEE Visualization},

abstract = {Conventional projector-based display systems are typically designed around precise and regular configurations of projectors and display surfaces. While this results in rendering simplicity and speed,it also means painstaking construction and ongoing maintenance. In previously published work, we introduced a vision of projector-based displays constructed from a collection of casually-arranged projectors and display surfaces.parIn this paper,we present flexible yet practical methods for realizing this vision, enabling low-cost mega-pixel display systems with large physical dimensions, higher resolution, or both. The techniques afford new opportunities to build personal 3D visualization systems in offices, conference rooms, theaters, or even your living room. As a demonstration of the simplicity and effectiveness of the methods that we continue to perfect, we show in the included video that a 10-year old child can construct and calibrate a two-camera, two-projector, head-tracked display system, all in about 15 minutes.},

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pubstate = {published},

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@incollection{Raskar1999b,

title = {Table-Top Spatially-Augmented Reality: Bringing Physical Models to Life with Projected Imagery},

author = {Ramesh Raskar and Greg Welch and Wei-Chao Chen},

url = {https://sreal.ucf.edu/wp-content/uploads/2017/02/Raskar1999b.pdf},

year  = {1999},

date = {1999-01-01},

booktitle = {Second International Workshop on Augmented Reality (IWAR'99)},

pages = {64-71},

address = {San Francisco, CA, USA},

keywords = {},

pubstate = {published},

tppubtype = {incollection}

}

@incollection{Raskar1998a,

title = {The Office of the Future: A Unified Approach to Image-Based Modeling and Spatially Immersive Displays},

author = {Ramesh Raskar and Gregory Welch and Matthew Cutts and Adam Lake and Lev Stesin and Henry Fuchs},

editor = {Michael F. Cohen},

url = {https://sreal.ucf.edu/wp-content/uploads/2017/02/Raskar1998a.pdf},

doi = {10.1145/280814.280861},

year  = {1998},

date = {1998-01-01},

booktitle = {Computer Graphics},

pages = {179-188},

publisher = {ACM Press, Addison-Wesley},

address = {Orlando, FL, USA (July 19 - 24)},

edition = {SIGGRAPH Conference Proceedings},

series = {Annual Conference on Computer Graphics & Interactive Techniques},

abstract = {We introduce ideas, proposed technologies, and initial results for an office of the future that is based on a unified application of computer vision and computer graphics in a system that combines and builds upon the notions of the CAVE, tiled display systems, and image-based modeling. The basic idea is to use real-time computer vision techniques to dynamically extract per-pixel depth and reflectance information for the visible surfaces in the office including walls, furniture, objects, and people, and then to either project images on the surfaces, render images of the surfaces, or interpret changes in the surfaces. In the first case, one could designate every-day (potentially irregular) real surfaces in the office to be used as spatially immersive display surfaces, and then project high-resolution graphics and text onto those surfaces. In the second case, one could transmit the dynamic image-based models over a network for display at a remote site. Finally, one could interpret dynamic changes in the surfaces for the purposes of tracking, interaction, or augmented reality applications.parTo accomplish the simultaneous capture and display we envision an office of the future where the ceiling lights are replaced by computer controlled cameras and smart projectors that are used to capture dynamic image-based models with imperceptible structured light techniques, and to display high-resolution images on designated display surfaces. By doing both simultaneously on the designated display surfaces, one can dynamically adjust or autocalibrate for geometric, intensity, and resolution variations resulting from irregular or changing display surfaces, or overlapped projector images.parOur current approach to dynamic image-based modeling is to use an optimized structured light scheme that can capture per-pixel depth and reflectance at interactive rates. Our system implementation is not yet imperceptible, but we can demonstrate the approach in the laboratory. Our approach to rendering on the designated (potentially irregular) display surfaces is to employ a two-pass projective texture scheme to generate images that when projected onto the surfaces appear correct to a moving head-tracked observer. We present here an initial implementation of the overall vision, in an office-like setting, and preliminary demonstrations of our dynamic modeling and display techniques.},

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pubstate = {published},

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}