About
Michael Holroyd researches new ways of creating digital models from real-world objects that exhibit complex shape and appearance. He also researches representations that enable efficient editing and analysis of these models, and fabricates objects with realistic designed or measured surface appearance.
Projects
Arqball Spin
Arqball Spin is a 360° photography solution that works right from your phone or tablet. Simply place your object on a turntable and use the free iOS or Android app to capture, edit, and share an interactive 360° spin.
Learn more and download the app at http://arqspin.com
Arqball Spin is my current focus. We came up with the idea after working on the UVaM project and realizing that 360 photography could be brought to the masses using mobile technology.
A Coaxial Optical Scanner for Synchronous Acquisition of 3D Geometry and Surface Reflectance
For my Computer Science Ph.D. I developed an extremely accurate system for measuring the shape and appearance of objects using computer controller cameras and lights. This allows recreating the appearance of that object under any lighting conditions and from any camera direction with photorealistic accuracy.
If you're interested in learning more about the technology, visit the project page, read the SIGGRAPH 2010 paper, or my dissertation.
University of Virginia Art Museum iPad Catalog
Interactive 3D visualizations of pottery and sculpture from the Ancient Mediterranean, Asia, Africa, and Ancient Americas. Each object in this catalog can be rotated and enlarged using simple touch gestures. A detailed description written by UVaM curators accompanies each piece and chronicles its history and cultural context.
Learn more and download the app at http://uvam.arqball.com
Computing and Fabricating Multilayer Models
Created a method for automatically converting a digital 3D model into a multilayer model: a parallel stack of high-resolution 2D images embedded within a semi-transparent medium. Multilayer models can be produced quickly and cheaply and provide a strong sense of an object's 3D shape and texture over a wide range of viewing directions.
Learn more on the project website or SIGGRAPH Asia 2011 paper
Molecular, Protein, and DNA Visualization
Created a pipeline for automatic generation of 3D models and a portable interactive viewer. Uses data from the Protein Data Bank and PubChem. This toolchain and viewer are currently used in several popular digital textbooks.
Bokeh: A Book About Cameras
Bokeh is a new kind of book about cameras designed for the iPad that contains lessons on focus, depth of field, exposure, and zoom. Each lesson simulates the photographic process on a real scene as you interactively adjust a camera setting.
Learn more and download the app at http://bokeh.arqball.com
High-Frequency Sinusoidal Illumination for Measuring the 3D Shape of Translucent Objects
Research on using modulated lightsources for scanning translucent objects. Discovered equations explaining the effect of translucency and modulated lightsources on optical triangulation methods for measuring the shape of translucent objects.
Learn more on the project website or CVPR2011 paper.
A Photometric Approach for Estimating Normals and Tangents
Developed the first approach for simulteansouly measuring the normal and tangent fields of objects with anisotropic materials.
Learn more on the project website or SIGGRAPH Asia 2008 paper.
Connectivity and Synchronizability
Research into the synchronization of discrete complex systems. This topic is critical in applications such as communication and transportation networks, neuron respiratory systems, and other systems in which either congestion can occur at individual nodes, or system wide synchrony is of importance to proper functionality.
Learn more or read publications on the project website
Publications
- Computing and Fabricating Multilayer Models
-
Michael Holroyd, Ilya Baran, Jason Lawrence, Wojciech Matusik. ACM Transactions on Graphics (Proc. SIGGRAPH Asia 2011).
- An Analysis of Using High-Frequency Sinusoidal Illumination to Measure the 3D Shape of Translucent Objects
-
Michael Holroyd, Jason Lawrence. IEEE Conference on Computer Vision and Pattern Recognition (CVPR 2011).
- Methods for the Synchronous Acquisition of 3D Shape and Material Appearance
- Michael Holroyd. Department of Computer Science, University of Virginia. Ph.D. Thesis. 2010.
- A Coaxial Optical Scanner for Synchronous Acquisition of 3D Geometry and Surface Reflectance
-
Michael Holroyd, Jason Lawrence, and Todd Zickler. ACM Transactions on Graphics (Proc. SIGGRAPH 2010), Vol. 29.
- A radiometric analysis of projected sinusoidal illumination for opaque surfaces
-
Michael Holroyd, Jason Lawrence, and Todd Zickler. University of Virginia Technical Report CS-2010-7, 2010.
- An Investigation of Synchrony in Transport Networks
-
Rex Kincaid, Natalia Alexandrov, Michael Holroyd. Journal of Complexity 2009, Vol. 14, Issue 4, pp. 34-43.
- A Photometric Approach for Estimating Normals and Tangents
-
Michael Holroyd, Jason Lawrence, Greg Humphreys, and Todd Zickler. ACM Transactions on Graphics (Proc. SIGGRAPH Asia 2008), Vol. 27.
- Understanding the Structure of Power Law Networks
-
Rex Kincaid, Christopher Gatz, Michael Holroyd. Proceedings of Spring Simulation Multiconference 2007, Vol. 2, pp. 104-111.
- Connectivity and Synchronizability of Discrete Complex Systems
- Michael Holroyd. Mathematics Department, The College of William and Mary. Honors Thesis. 2006.
- Connectivity and Synchronizability of Discrete Complex Systems
- Michael Holroyd. Proceedings of the Sixth International Conference on Complex Systems. New England Complex Systems Institute, Quincy, MA. 2006.
Patents
- Method for Computing the Similarity of Two Image Sequences
- US61/664,325. Michael Holroyd, Jason Lawrence, abhi shelat. 2012.
- Capturing, Labeling, and Viewing a 3D Dataset
- US61/609,313. Michael Holroyd, Jason Lawrence, abhi shelat. 2012.
- System and Method for Producing Three-dimensional Multilayer Objects from Digital Models
- US20120255663A1. Michael Holroyd, Ilya Baran, Jason Lawrence, Wojciech Matusik. 2011.
- Coaxial Optical Scanner for Synchronous Acquisition of 3D Geometry and Surface Reflectance and Related Method
- Michael Holroyd, Jason Lawrence, Todd Zickler. 2010.
Awards
- SBIR Phase II: Interactive 3D Technical Illustrations for Science and Engineering
- National Science Foundation. $500,000 grant to research algorithms for creating interactive illustrations and develop methods for extracting 3D geometry from image-sequences.
- SBIR Phase IB: Interactive 3D Technical Illustrations for Science and Engineering
- National Science Foundation. $40,000 additional funding for Arqball Spin project to reduce barriers to entry for new users, including software improvements that enable new simpler turntable designs.
- SBIR Phase I: Interactive 3D Technical Illustrations for Science and Engineering
- National Science Foundation. $150,000 grant to develop and commercialize tools for creating and displaying interactive 3D technical illustrations on multitouch devices, focusing primarily on STEM-related topics in education.
- University of Virginia Computer Science Best Graduate Research Award, 2011
- For publishing multiple papers at top-tier conferences in 2010-2011.
Other Stuff
Search and Rescue
Chair, Board of Directors, and Training Officer for the Blue Ridge Mountain Rescue Group
- Emergency Medical Technician (EMT-B)
- Search Team Member (STM), Search Team Leader (STL), Search Team Signcutter (STS)
- Vehicle Rescue Operations
- Vertical Rescue Technician Level 3
Pilot
Most hours are in Cessna 172s and Cessna 152s. In the middle of Instrument Training.
- Private Pilot License - Single Engine Land Airplane
Roller Derby Ref
Referee for the Charlottesville Derby Dames. Derby name is Leftwrist Twist.
Erdös number
5: Paul Erdös; Lee Rubel; Shreeram Abhyankar; Thomas Morin; Rex Kincaid; Michael Holroyd
Academic Genealogy
- John Loehlin advised...
- Robert Plummer, Ph.D. from University of Texas, advised...
- Henry Fuchs, Ph.D. from Utah University in 1975, advised...
- Marc Levoy, Ph.D. from University of North Caorlina in 1989, advised...
- Szymon Rusinkiewicz, Ph.D. from Stanford in 2001, advised...
- Jason Lawrence, Ph.D. from Princeton in 2006, advised...
- Michael Holroyd, Ph.D. from University of Virginia in 2011.