Dr. Michael Holroyd is a researcher, full-stack engineer, and business owner experienced in commercializing scientific research including several large projects related to 3D reconstruction, interactive media, geospatiotemporal search, and real-time audio analysis on web and mobile platforms.

Harmony Helper

Real-time audio analysis of harmonized parts to provide professional singers with training advice and feedback on their performance. Primary inventor of five accepted US patents.

Learn more at Harmony Helper or Download the App

3D Printing for Complex Cranial Education

Combining 3D volumetric data sources (MRI, CT, etc) with 3D printing and augmented reality to improve skull base approach education for neurosurgeons, for general training and in preperation for specific surgeries.

Collaboration with the Department of Neurologic Surgery at the Mayo Clinic

Cville Trails

Geolocation enabled web-app showing trails in the central virginia area, for wayfinding and issue reporting.

Check it out at cvilletrails.com

SceneThink

A modern web-based system for connecting event organizers to the influencers and organizations that drive attendence. Integrates event management, event promotion, editorial content, and ticketing. Sold to CitySpark in 2023.

Visit http://scenethink.com

Charlottesville Real Estate Tax Assessment

Live updating data visualization of parcel assessed value per sqft, with neighborhood boundaries. For cvilletomorrow.org, a non-profit news organization

See more on ObservableHQ

Fabregé at the Virginia Museum of Fine Art

Digitization, interactive multimedia, and iOS project in support of the Lillian Thomas Pratt Collection of Fabergé and Russian Decorative Arts.

Read more at the Virginia Museum of Fine Art

Smoke Detective

Machine learning algorithms for automated monitoring and detection for smoke/fire events in live video. Turn any camera into a smoke alarm.

For more information, visit smokedetective.com

PANOPTES

A system for indexing, searching, and visualizing large unstructured multimedia collections. Our horizontally scalable approach determines absolute position, direction of capture, and time for each piece of media. This metadata will facilitate navigation through map-based interfaces that support intuitive queries depending on time and location.

Read more at the National Science Foundation

Photograph Authenticity and Licensing

Large media organizations are exposed to liability from accidental unauthorized use of photographs, or use of inauthentic digitally manipulated photographs. Some manipulation of photographs is required in practice such as converting RAW images to JPEG, or adjusting white balance, which makes establishing authenticity and verifying licensing difficult. Our system automatically verifies photograph licensing with an auditable chain of provenance based on user-defined "acceptable" digital modifications.

Albemarle Country Rescue System Map

Open source project for visualization of 911 call data for the Charlottesville-Albemarle area.

Read more at the Albemarle County Fire Rescue System Map

UAV-based 3D reconstruction

Department of Transportation project to develop a non-contact portable geometry measurement system based on machine vision/image processing technology suitable for routine inspection and accident investigation activities.

Learnstream

Learnstream is a tool to help you navigate your online discoveries and organize them so you can continue to learn and even teach others. With learnstream, you can click and save webpages to your account using the bookmarklet button. From there, you can sort your pages into guides and share them with other learnstream users, and then explore other user-create guides.

Visit http://learnstream.com

Vinyet

Vinyet is an iOS app for creating, editing, and sharing social videos. Features creative color grading, time-lapse and stop-motion animation effects, and a variety of share options including animated GIF.

Learn more and download the app at http://vinyet.co

FocusTwist

FocusTwist is an iOS app that lets you take refocusable images with your iPhone or iPad. It works by taking several images at different focus settings, and creating an interactive twist that you and your friends can interactively refocus later.

Learn more at http://www.focustwist.com

Interactive 3D Technical Illustrations for Science and Engineering

This NSF funded research develops tools for creating, displaying, and publishing interactive 3D content. The resulting technology has empowered educators, students, publishers, and businesses to easily produce interactive 3D illustrations for digital books and online education materials.

Learn more at the National Science Foundation. This technology is being used in eTextbooks at Intel Education Study.

Arqspin

Arqspin 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

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

Publications

A 3D Printed, Multicolor, Drillable Simulation System for Skull Base Drilling with Direct, Objective Real-Time Feedback

Bachtri Nguyen, Jonathan Morris, Visish Srinivasan, Michael Holroyd, Lucas Carlstrom, Avital Perry, Maria Peris-Celda, Michael Link, Christopher Graffeo. (Journal of Neurological Surgery Part B: Skull Base 2023)

3D Modeling for Approach Selection Pedagogy in Complex Cranial Surgery: Skull Basics Overview and Proof-of-Concept Results.

Bachtri Nguyen, Jonathan Morris, Visish Srinivasan, Michael Holroyd, Lucas Carlstrom, Avital Perry, Maria Peris-Celda, Michael Link, Christopher Graffeo. (Journal of Neurological Surgery Part B: Skull Base 2023)

Three-Dimensional Modeling for Augmented and Virtual Reality–Based Posterior Fossa Approach Selection Training: Technical Overview of Novel Open-Source Materials.

Lucas Carlstrom, Christopher Graffeo, Avital Perry, Bachtri Nguyen, Amy Alexander, Michael Holroyd, Maria Peris-Celda, Colin Driscoll, Michael Link, Jonathan Morris. (Operative Neurosurgery 2022). 22. 409-424.

3D Printing for Complex Cranial Surgery Education: Technical Overview and Preliminary Validation Study

Christopher Graffeo, Avital Perry, Lucas Carlstrom, Maria Peris-Celda , Amy Alexander, Hunter Dickens, Michael Holroyd, Colin Driscoll, Michael Link, Jonathan Morris. (Journal of Neurological Surgery Part B: Skull Base 2021).

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.

Teaching

Organizer, Central Virginia Javascript Meetup

Arrange for monthly speakers on topics of interest. Several presentations on efficient work queue systems, new language features, and data visualization. 2012-2021.

Adjunct Professor, Northeastern University

DSSH6302 & PPUA5302: Information Design and Visual Analytics, topics including human perception and the grammar of visualization. 2016-2019.

Guest Lecturer, University of Virginia

COMM 4251: Digital Safari, introduction to blockchain and cryptocurrency. 2021.

CS 6501: Computer Vision, topics including structure from motion and automatic camera calibration. 2013-2015.

STS 2500: Engineered Objects – Technology and Design Thinking in History. 2016.

CS 4501-008: Introduction to Computer Vision. 2018-2019.

REU grants, National Science Foundation

Principal investigator and mentor for summer undergraduate researchers at Arqball. 2013-2016.

Philadelphia Elasticsearch Meetup

Workshop on indexing and searching ~4 million photographs using Elasticsearch. 2014.

Patents

System for Creating, Practicing, and Sharing of Musical Harmonies

US16/206,496. Andrew Goren, Michael Holroyd, Lindsay Ifill. 2020

Teaching Vocal Harmonies

US20190139437. Andrew Goren, Michael Holroyd, Lindsay Ifill, Robert McClure. 2019

Real-time pitch detection for creating, practicing and sharing of musical harmonies

US10249209. Andrew Goren, Michael Holroyd, Lindsay Ifill. 2018

Transcribing voiced musical notes for creating, practicing and sharing of musical harmonies

US10192461. Andrew Goren, Michael Holroyd. 2018.

System for creating, practicing and sharing of musical harmonies

US10217448. Andrew Goren, Michael Holroyd, Lindsay Ifill. 2018.

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

2019 Virginia Press Association Award: 1st place, Informational Graphics (Online)

Live updating data visualization of parcel assessed value per sqft, with neighborhood boundaries. For a cvilletomorrow.org article by Emily Hays. See more on ObservableHQ

SBIR Phase IIB: Interactive 3D Technical Illustrations for Science and Engineering

National Science Foundation. $250,000 grant to research automated techniques for recovering 3D models from 360 datasets.

SBIR Phase I: A System for Analyzing Big Unstructured Multimedia Data Collections with Applications in Law Enforcement, Manufacturing, and Retail

National Science Foundation. $150,000 grant to develop and commercialize a software system for rapidly indexing, searching, and visualizing large multimedia collections. Our horizontally scalable approach will facilitate navigation through map-based interfaces that support intuitive queries depending on time and location.

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 Arqspin project to reduce barriers to entry for new users, including software improvements that enable new simpler turntable designs.

SBIR TECP: Interactive 3D Technical Illustrations for Science and Engineering

National Science Foundation. $100,000 additional funding for Arqspin to research GPU acceleration in collaboration with NVIDIA Research.

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

Pilot

Most hours are in a Mooney 20F, Piper Arrow, or Cessna 172.

• Commercial Pilot License - Single Engine Airplane Land & Sea
• Complex Endorsement (Landing gear, adjustable pitch propeller)
• Instrument Rating (Flying through clouds without visual reference)

Co-founder and Treasurer of the Monticello Flying Club

Search and Rescue

Former 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

Rivanna Trails Foundation

President of the Rivanna Trails Foundation, whose mission is to create and protect footpaths, trails, and greenways within the Rivanna River watershed. The RTF maintains a network of trails including a 20 mile loop of single-track trail around Charlottesville, Virginia.

RTF is a volunteer organization supported solely by tax-deductible contributions. You can help this effort by joining the Rivanna Trails Foundation.

Roller Derby Ref

Former Head Referee for the Charlottesville Derby Dames. Derby name is Leftwrist Twist.

WFTDA Game History (Ref Resume)

Amateur Radio

• Technician License
• General License
• WO4JMO

SCUBA

• Advanced Open Water Diver

Go

Let me know if you want to play.

• 8kyu on Online Go
• 11kyu on KGS
• 14kyu on Pandanet IGS