Contact information

ｔｓｓ＠ｒｉ․ｃｍｕ․ｅｄｕ
My GPG key

cell phone:	412 608 4056
lab phone:	412 268 3922
office phone:	412 268 1420

AIM:	tstepleton
Skype:	tstepleton

Tom Stepleton's webpage

I'm a Ph.D. student at the Robotics Institute at Carnegie Mellon. I study computer vision, specifically unsupervised object model learning from video. My advisor is Dr. Tai Sing Lee. Naturally, this webpage is under development.

NB: Stepleton is pronounced with a long E: the first part sounds like the word steep.

1. Vision stuff

...pending.

2. Code

A partial implementation of Bai and Sapiro's fast image matting method from ICCV 2007. Templated C++ (with Boost), MATLAB interface, OpenCV interface. Includes:
- A lightweight plotting library for OpenCV
- Glue code for using 2D MATLAB and OpenCV matrices with Boost::Graph
A partial implementation of Beal, Ghahramani, and Rasmussen's Infinite HMM from NIPS 2001. Templated C++. You will have to implement the configurable class (not hard), and an interface to a better random number generator is probably a good idea.
An implementation of a generalized Swendsen-Wang graph partition sampling algorithm described by Barbu and Zhu in 2003 and used in subsequent works. Templated C++.
Code for computing Stirling numbers of the first kind. C++ with a MATLAB MEX interface. Caches results so no number is computed more than once. Requires the GNU MP bignum library.
An implementation of the Adaptive Rejection Sampling algorithm for 1-D density functions. Templated C++ with a MATLAB MEX interface.

Yes, all of my code looks like this...

3. Other items

A technical note on using the Infinite HMM of Beal et al. with data that does have hidden state labels—it's easier than you think! Or harder, depending...
I collaborated with TechBridgeWorld to develop the Adaptive Braille Writing Tutor project. Last summer I worked with undergraduate Daniel Dewey to improve the adaptivity of the Tutor. Some slides about mentoring undergrads at TechBridgeWorld and why it's a good idea. The source code for the library I developed for the Tutor is not online yet, but you can browse the library documentation here.
I am on Robotics Institute Ph.D. research qualifier committees for Jean-François Lalonde and Daniel Leeds. Previously I was on Ph.D. qualifier and Masters committees for Nathaniel Fairfield and Kevin Yoon respectively.
I have TA'd for the undergraduate course 15-212: Principles of Programming. Some recitation slides are available online.

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