PhD student, Robotics Institute
Carnegie Mellon University
Email: clz@ri.cmu.edu
Phone: (412) 268-5594
Advisor: Takeo
Kanade
I'm currently doing a post-doc at Microsoft research in Redmond. I may be contacted at larryz@microsoft.com . A copy of my thesis may be found here.
Machine Learning - Currently, my research is focused on developing efficient learning algorithms. Sample applications include image retrieval, language modeling and collaborative filtering. To accomplish these tasks I've developed a method based on maximizing a non-standard measure of entropy called Renyi's quadratic entropy. Using this measure, the distribution with maximum entropy can be found using a set of linear equations. The computational complexity of this algorithm is polynomial, unlike traditional maximum entropy algorithms that are exponential. I'm defending my thesis in April 2003.
Stereo Vision - Over the past six years I have worked on many different aspects of stereo vision, including using parallel computers, creating portable 3D cameras and the creation of new algorithms. My most recent work has centered around a cooperative algorithm.
Telepresence - I have worked with Microsoft's BARC (Bay Area Research Center) on making telepresence more engaging. Run a demo for manipulating my head orientation and eye gaze.
Software Sound Synthesis - I have developed several applications to explore new methods for sound synthesis. The synthesizers include physically based models of acoustic guitars and virtual analogs. To learn more please visit CutterMusic.
Refereed Papers
Gaze Awareness for Videoconferencing: A Software Approach
J. Gemmell, C. Zitnick, T. Kang, K. Toyama and Steven Seitz
IEEE MultiMedia, pp. 26-35, Oct.- Dec. 2000
A Cooperative Algorithm
for Stereo Matching and Occlusion Detection
C. L. Zitnick and T. Kanade
Proc. IEEE Trans. Pattern Analysis and Machine Intelligence, vol. 22,
no. 7, July 2000.
Method of Producing a Three Dimensional Image from Two Dimensional Images.
Jon A. Webb, C. Lawrence Zitnick. Patent Number: 5,818,959, Oct.
6, 1998.
A Multibaseline Stereo
System with Active Illumination and Real-time Image Acquisition
S. Kang, J.A. Webb, C. Zitnick, and T. Kanade
The Fifth International Conference on Computer Vision, June, 1995,
pp. 88-93.
Technical Reports
A Cooperative Algorithm
for Stereo Matching and Occlusion Detection
C. Zitnick and T. Kanade
tech. report CMU-RI-TR-99-35, Robotics Institute, Carnegie Mellon University,
October, 1999.
Manipulation
of Video Eye Gaze and Head Orientation for Video Teleconferencing
Zitnick, C. Lawrence ; Gemmell, Jim ; Toyama, Kentaro
MSR-TR-99-46
A Volumetric Iterative
Approach to Stereo Matching and Occlusion Detection
C. Zitnick and T. Kanade
tech. report CMU-RI-TR-98-30, Robotics Institute, Carnegie Mellon University,
December, 1998.
Multi-baseline Stereo
Using Surface Extraction
C. Zitnick and J.A. Webb
tech. report CMU-CS-96-196, Computer Science Department, Carnegie Mellon
University, 1996.
An Active Multibaseline
Stereo System with Real-Time Image Acquisition
S. Kang, J. Webb, C. Zitnick, and T. Kanade
tech. report CMU-CS-94-167, Computer Science Department, Carnegie Mellon
University, September, 1994.
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