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Dongryeol Lee
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Dongryeol Lee

Email: drselee At gmail Dot com

CV: (pdf)


Georgia Institute of Technology
Ph.D. in Computer Science (Fall 2005~Spring 2012).
M.S. in Mathematics (Spring 2011).

Carnegie Mellon University
B.S. in Computer Science (Spring 2005).
B.S. in Mathematical Sciences (Spring 2005).

I am now a Research Scientist at Yahoo Labs. Previously I was a Machine Learning Research Scientist at GE Global Research specializing in large-scale machine learning. Ph.D. thesis: (pdf) Defense slides: (pdf)
Research Projects
Fast Algorithms FMM plot

Fast Kernel Summations
(open-source C++ implementation of the dual-tree fast Gauss transform is available (updated April 24, 2012) here

D. Lee, R. Vuduc, and A. G. Gray.
A Distributed Kernel Summation Framework for General-Dimension Machine Learning (pdf) .
In SIAM International Conference on Data Mining, 2012. Best Paper Award (1 out of 363 submissions, 1 out of 99 accepted submissions). Poster
Journal version in Statistical Analysis and Data Mining

W. B. March, A. Ozakin, D. Lee, R. Riegel, and A. G. Gray.
Multi-Tree Algorithms for Large-Scale Astrostatistics.
In Advances in Machine Learning and Data Mining for Astronomy, Chapman and Hall/CRC Press, 2012.

D. Lee, A. Ozakin, and A. G. Gray.
Multibody Multipole Methods. (arXiv)
To appear in Journal of Computational Physics, 2012.

D. Lee, and A. G. Gray.
Fast High-dimensional Kernel Summations Using the Monte Carlo Multipole Method. (pdf)
In: Advances in Neural Information Processing Systems, 2008. Poster

D. Lee and A. G. Gray.
Faster Gaussian Summation: Theory and Experiment. (pdf)
In: Proceedings of the Twenty-Second Conference on Uncertainty in Artificial Intelligence, 2006.
The datasets used for the paper (due to popular request)

D. Lee, A. G. Gray, and A. W. Moore
Dual-Tree Fast Gauss Transforms. (pdf) (bibtex)
In: Advances in Neural Information Processing Systems, 2005. Poster

Rank approximate nearest neighbor

Fast Nearest Neighbor
P. Ram, D. Lee, and A. G. Gray.
Nearest-Neighbor Search on a Time Budget via Max-Margin Trees.
To appear in SIAM International Conference on Data Mining, 2012.

P. Ram, D. Lee, H. Ouyang, and A. G. Gray.
Rank-Approximate Nearest Neighbor Search: Retaining Meaning and Speed in High Dimensions. (pdf)
In: Advances in Neural Information Processing Systems, 2009.

Mean shift

Fast Non-parametric Clustering
P. Wang, D. Lee, A. G. Gray, and J. M. Rehg.
Fast Mean Shift with Accurate and Stable Convergence. (pdf)
In: Proceedings of the Eleventh International Conference on Artificial Intelligence and Statistics, 2007. Poster

Theoretical Analysis Pruning for kernel summation Dual-tree using cover-tree

Run-time analysis of N-body methods
P. Ram, D. Lee, W. B. March, and A. G. Gray
Linear-time Algorithms for Pairwise Statistical Problems. (pdf)
In: Advances in Neural Information Processing Systems, 2009.

Applications GPRF classes GPRF classification

Fast Algorithms for Applications
K. Kim, D. Lee, and I. Essa.
Detecting Regions of Interest in Dynamic Scenes for Camera Motion.(pdf)
To appear in IEEE Conference on Computer Vision and Pattern Recognition, 2012.

K. Kim, D. Lee, and I. Essa.
Gaussian Process Regression Flow for Analysis of Motion Trajectories. (pdf) (main project page)
In: Proceedings of IEEE International Conference on Computer Vision, 2011.

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