About Me

I'm an Assistant Professor of Computer Science at York University, a Senior Researcher at Borealis AI and am an Adjunct Professor in the University of Toronto Department of Computer Science. Originally from the United States, I moved to Canada in 2001 to study at the University of Toronto where I received my PhD in 2011. I also did postdocs at the Toyota Technological Institute at Chicago, Toronto Rehabilitation Hospital and the University of Toronto. My research interests span computer vision, machine learning and statistics.

I am a member of the Centre for Vision Research and core member of the Vision: Science to Application (VISTA) program at York University. I am also currently serving as an Associate Editor for the journal IET Computer Vision

More information about me can be found in my CV. Content is still being added to this site, so you may also be interested in my old website.

Research Interests

I am interested in building rich, detailed models of the world which capture fundamental relationships between the world and our observations of it. Such models ultimately enable us to measure and predict sometimes surprising details.

Most recently I have been focusing on the problem of estimating the 3D structure of biological molecules such as proteins and viruses with Cryo-EM. However, I have also worked on vehicle localization for robotics, physically realistic models of human motion, probabilistic programming languages, Bayesian methods, MCMC and forensic ballistics.

Prospective Students

Interested graduate students should apply to the EECS Graduate Program and indicate an interest in working with me in your application. Students may also contact me directly, but please note that I may not be able to reply due to the volume of emails I recieve.

Recent Posts

February 7, 2018

Striving for Impact

I wrote a brief essay on striving for impact in research, in particular in machine learning. You can read it on TechVibes here.

February 5, 2018

Joining Borealis AI

I am excited to announce that I will be joining Borealis AI as a Senior Researcher. This will be part time for now and become full time starting May 1st, when I take a leave of absence from my position at York University. Read more about Borealis and the work I'll be doing there here.

June 22, 2017

Dynamic Texture Synthesis and Style Transfer

Our new paper on dynamic textures is now available on arXiv here and the website with more results and details can be found here.

Also, I'll be attending CVPR in July. If you're going to be there and would like to meet up, feel free to drop me an email.

May 8, 2017

Travel Plans

I'll be visiting and speaking at several places in Montreal and Lausanne this month. Feel free to say hello!

I also recently visited the Program in Applied and Computational Mathematics at Princeton University to deliver the IDeAS Seminar on April 27th.

February 6, 2017

Introducing cryoSPARC

A major focus of my research over the last few years as been into new methods for the determination of 3D structures of viruses and proteins. A big piece of that work has been published today in Nature Methods. This article describes the algorithmic advances which underpin cryoSPARC. This work was done in collaboration with Ali Punjani (PhD Student, University of Toronto), John Rubinstein (Senior Research Scientist, Hospital for Sick Children) and David Fleet (Professor, University of Toronto).

For a non-technical introduction to our work, you can take a look at this story out of University of Toronto, Scarborough.