Vassilis Athitsos Home Page

Vassilis Athitsos
Assistant Professor
Computer Science and Engineering Department
University of Texas at Arlington
Office: ERB 623
Office hours, 5/14/2012 to 06/04/2012: by appointment only.
Phone: 817-272-0155

Publications - Curriculum Vitae - Contact Info - VLM Lab

Teaching

Fall 2011: CSE 4308/5360 - Artificial Intelligence I.
Spring 2012: CSE 6367 - Computer Vision.
Spring 2012: CSE 4392/6369 - Special Topics: Sign Language Recognition.

Research - VLM Research Lab

My main research areas are computer vision, machine learning, and data mining. At UTA, I have established the VLM research lab. A large part of my current work focuses on developing general methods for efficient and accurate similarity-based retrieval and classification, with applications in sign language recognition, content-based access in image, video and multimedia databases, and recognition of objects and shapes. Details on the various projects I've been working on are provided in my publications. Brief descriptions of some recent/ongoing projects can be found at the following links:

ASL dictionary search
The goal of this project is to develop a system that lets users search dictionaries of American Sign Language (ASL), so as to look up the meaning of unknown signs. Videos and annotations from this project are available here.
Subsequence matching in large databases of time series.
The goal of this project is to develop methods for efficient identification of subsequence matches in large databases of time series. Demo applications are being developed for sign language video, query by humming, and handwritten text search. Code and data from our SIGMOD 2008 paper are available here.
Nearest-neighbor retrieval and classification
Information on how to download code and datasets for BoostMap and Distance-Based Hashing can be found by clicking here.
Detecting shape classes of variable structure in cluttered images
Hand pose estimation
Code and data for this project can be downloaded as a zipped file, with size approximately 100MB, from this link.

Some Representative Recent Publications - All Publications

A. Stefan, V. Athitsos, and G. Das. The Move-Split-Merge Metric for Time Series, TKDE, accepted April 2012, to appear.
P. Papapetrou, V. Athitsos, M. Potamias, G. Kollios, and D. Gunopulos. Embedding-based Subsequence Matching in Time Series, TODS, August 2011.
H. Wang, A. Stefan, S. Moradi, V. Athitsos, C. Neidle, and F. Kamangar. A System for Large Vocabulary Sign Search, Workshop on Sign, Gesture and Activity, September 2010.
J. Alon, V. Athitsos, Q. Yuan, and S. Sclaroff. A Unified Framework for Gesture Recognition and Spatiotemporal Gesture Segmentation, PAMI, September 2009.
P. Papapetrou, V. Athitsos, G. Kollios, and D. Gunopulos. Reference-Based Alignment in Large Sequence Databases, PVLDB, August 2009.