Yanxi Liu's Home Page
Co-Director of the Lab for Perception, Action and Cognition (LPAC).
Associate Professor of Computer Science and Engineering and Electrical Engineering, College of Engineering, Penn State University
Adjunct Professor of Radiology Department,
Adjunct Associate Research Professor of the Robotics Institute ( official RI web-page ) and the Machine Learning department, School of Computer Science , Carnegie Mellon University.
Guest Professor of Computer Science
Department,
Address and Phone Numbers
Dr. Yanxi Liu338B
Office: (814) 865-7495
Email: yanxi ATsign cse.psu.edu
What's new
-- Deformed
Lattice Detection in Real-World Images using Mean-Shift Belief Propagation M. Park, K. Brocklehurst,
R. T. Collins, and Yanxi Liu. Regular Paper. IEEE Transaction on Pattern Analysis and Machine Intelligence
(PAMI). Special Issue on Probabilistic Graphical Models. To
appear.
-- Curved
Glide-Reflection Symmetry Detection Lee and Liu (CVPR 2009 oral presentation, 4.17% =
61/1464 acceptance rate)
-- Openings
i.
Programmer(s)
for developing and maintaining neuroimage image analysis software (CMU or PSU)
ii.
Qualified
graduate (Ph.D. level preferred) and undergraduate (honor thesis) students interested in research projects on
1. Statistical learning in biomedical
image analysis (e.g. MR, CT neuroimages) and computer aided-diagnosis (NIH, PA
health department supported)
2. Symmetry and symmetry group theory
application on real world images for machine perception (NSF)
-- My recent tech talk at Google
-- Dr. Liu and Dr. Nguyen (college of medicine) received
the PSU 2008 Grace Woodward Grant for collaborative research in engineering and
medicine on "Asymmetry-based
Brain Tumor Quantification", June 2008.
-- Pattern Recognition from 3D Histology Images for
Translational Science and Discovery, PSU CTSA initiative award in
collaboration with Dr. Keith Cheng (COM), May 2008
Teaching
Spring 2009: Computer Graphics (CMPSC 458)
Machine Learning for Computational Regularity (CSE598E, #schedule 314182)
Past -- Fall 2008: Pattern Recognition and Machine Learning (CSE 583/EE 552). Textbook by Christopher M. Bishop
-- Spring 2008:
Computer Graphics (CMPSC 458). Here is a video of sample student projects from last year (Spring 2007)! showcase
-- Fall 2007: Computational Symmetry
Service
Short
Course/Tutorial Chair (CVPR 2009)
Tutorial
(CVPR08 with Y. Ma): Computational Symmetry: from symmetry group theory to
applications and quantitative validations in computer vision and pattern
research
Area Chairs: CVPR
2008, MICCAI 2008
Tutorial (ACCV07): Computational
Symmetry
Talks (2007-2008)
NIPS first Algebraic
Methods in Machine Learning Symposium. Title: Symmetry Group-based Learning for Regularity Discovery from Real World
Patterns
Google (Mountainview ,
CA
Perceptual Science Talk, Rutgers
University
The 5th Seminar on Knowledge search Core
ACCMS (Academic Center For Computing and Media Studies)
Kyoto University ,
Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan
Australian National
University
Invited Speaker for Content-based
Image retrieval for Biomedical Image Archives (MICCAI 2007)
Briefs
The PSU Near-Regular Texture
Database is formally released! You are invited to visualize, download and
submit photos containing regular, near-regular and irregular textures!
Edited book (LNCS, Springer) on
"Computer
Vision for Biomedical Image Applications: Current Techniques and Future
Trends" is available! If you are interested in obtaining a copy, contact
yanxi!
Recent Publication
2009
Deformed
Lattice Detection in Real-World Images using Mean-Shift Belief Propagation M. Park, K. Brocklehurst, R. T. Collins, and
Yanxi Liu. IEEE TPAMI. To appear.
Curved
Glide-Reflection Symmetry Detection S. Lee and Y. Liu, CVPR 2009 oral presentation.
2008
Deformed Lattice
Detection via Mean-Shift Belief Propagation
M. Park, R. Collins, and Y. Liu
European Conference on Computer Vision (ECCV), October, 2008.
[PDF] [Project Page]
Seungkyu
Lee, Robert T. Collins and Yanxi Liu, "Rotation Symmetry Group Detection
Via Frequency Analysis of Frieze-Expansions," Computer Vision and
Pattern Recognition Conference (CVPR '08)
[PDF] [Project Page]
Yanxi
Liu, Tamara Belkina, James H. Hays, and Roberto Lublinerman, "Image
De-fencing," Computer Vision and Pattern Recognition Conference
(CVPR '08)
[PDF] [Project Page]
Minwoo
Park, Seungkyu Lee, Po-Chun Chen, Somesh Kashyap, Asad A. Butt and Yanxi Liu,
"Performance Evaluation of State-of-the-Art Discrete Symmetry Detection
Algorithms," Computer Vision and Pattern Recognition Conference
(CVPR '08)
[PDF] [Project Page]
[PDF]
Grant
Schindler, Panchapagesan Krishnamurthy, Roberto Lublinerman, Yanxi Liu and
Frank Dellaert, "Detecting and Matching Repeated Patterns for
Automatic Geo-tagging in Urban Environments," Computer Vision and
Pattern Recognition Conference (CVPR '08)
Leonid Teverovskiy, James
Becker, Oscar Lopez, Yanxi Liu, "QUANTIFIED
BRAIN ASYMMETRY FOR AGE ESTIMATION OF
Brian A. Canada, Georgia K.
Thomas, Keith C. Cheng, James Z. Wang and Yanxi Liu ``Automatic Lattice Detection in
Near-Regular Histology Array Images,'' In Proceedings of the IEEE International Conference on Image Processing,
Brian A. Canada, Georgia K.
Thomas, Keith C. Cheng, James Z. Wang and Yanxi Liu ``Towards Efficient Automated
Characterization of Irregular Histology Images via Transformation to
Frieze-Like Patterns,'' In Proceedings of the ACM International Conference on Image and Video
Retrieval, Niagara Falls, Canada, ACM, July 2008.
Research Interests
* Computational Symmetry and Group
Theory Applications, including image/video analysis of brains, faces,
gaits, dance (computer vision), mechanical and kinematic assemblies (robotics),
periodical and near-regular patterns (pattern recognition), and texture
analysis, classification and synthesis (computer graphics).
* Discriminative
subspace exploration for reduction and selection (machine learning), including
large biomedical image database indexing and retrieval, classification, CAD for
early detection of neurodegenerative diseases, target tracking and deformable
registration.
Teaching
* Pattern Recognition
(and Machine Learning) CSE 583/EE 552 PSU Fall 2008
* Fundamentals of Computer Graphics (PSU Spring
2008: CMPSC 458 - OLD COURSE CSE 418)
* Computational Symmetry (PSU Fall 2007: CSE 398B)
(Course Description))
* Computer Graphics (PSU Spring 2007: CSE 418)
* Computational Symmetry (PSU Fall 2006: CSE 398B,
IST 597G, schedule #794395) Fall 2006 (Course Description))
* Group Theory and Its Applications in Robotics, Computer Vision, Computer Graphics and Medical Image Analysis (PSU: CSE 398D, schedule #695956) Spring 2006
* Group Theory
Applications in Robotics, Computer Vision, Computer Graphics and Medical Image
Analysis, CMU Fall 2005
* 15-462
Computer Graphics, CMU Spring 2005.
* Methods in
Medical Image Analysis (16-725) CMU Spring 2005. Spring 2004. Spring 2003.
* Advanced Machine Perception CMU
Spring 1998, Spring 1999, Spring 2000 , and Spring 2001.
Publications (complete list)
2007
Shape
Variation-Based Frieze Pattern for Robust Gait Recognition
By
S.Lee, Y.Liu and R.Collins, CVPR 2007,
June, 2007.
Quantified Symmetry for
Entorhinal Spatial Maps
Special Issue in Neurocomputing Journal, Vol. 70, No. 10 - 12, June,
2007, pp. 1723 - 1727.
A Lattice-based
MRF Model for Dynamic Near-regular Texture Tracking
Wen-Chieh Lin and Yanxi Liu.
IEEE Transactions on Pattern Analysis and
Machine Intelligence. Volume 29, No. 5.pp. 777-792. May, 2007.
Discovery of
"Biomarkers" for Alzheimer's Disease Prediction from Structural MR
Images
Y. Liu, L. Teverovskiy, O. Lopez, H. Aizenstein, C. Meltzer, and J. Becker
2007 IEEE International Symposium on Biomedical Imaging, April, 2007.
Feature-based vs.
Intensity-based Neuroimage Registration: Comprehensive Comparison Using Mutual
Information
L. Teverovskiy, O. Carmichael, H. Aizenstein, N. Lazar, and Y. Liu
2007 IEEE International Symposium on Biomedical Imaging, April, 2007.
Longitudinal changes in
cerebral ventricles in the Cardiovascular Health Study
O. Carmichael,
L.H. Kuller, O. Lopez, P.M. Thompson, R.A. Dutton, A. Lu, S.E. Lee, J.Y. Lee,
H. Aizenstein, C. Meltzer, Y.
Liu, A.W. Toga, and J. Becker
Alzheimer's Disease and Associated Disorders, January, 2007.
Understanding the Role of
Facial Asymmetry in Human Face Identification
S. Mitra,
Statistics and Computing, Vol. 17, January, 2007, pp. 57 - 70.
2006
Quantitative Evaluation on Near
Regular Texture Synthesis by W. Lin, J. Hays, C. Wu, V. Kwatra, Y. Liu.
Computer Vision and Pattern Recognition Conference (CVPR) 2006. NYC. June. Quantitative
Evaluation results page
Body Localization in Still
Images Using Hierarchical Models and Hybrid Search by J. Zhang, Luo,
Collins, Liu. CVPR 2006. NYC, June.
Tracking Dynamic
Near-regular Textures under Occlusions and Rapid Movements. By W. Lin and
Y. Liu. 9th European
Conference on Computer Vision.
Discovering Texture Regularity
as a Higher-Order Correspondence Problem By J.H.
Hays, M. Leordeanu, A.A. Efros, and Y. Liu. 9th
European Conference on Computer Vision. Graz , Austria
Technical
Reports
Students
CURRENT:
Seungkyu Lee (2nd Year Ph.D. student, Computer
Science and Engineering, PSU)
Minwoo Park
Somesh
Kashyap (MS student, EE/PSU)
Kyle Brocklehurst (undergraduate student, CSE/PSU)
Teverovskiy,
Leonid (6th Year Ph.D. student, Machine Learning Department, CMU)
Tamara Belkina
(B.S. honor thesis) Computer Science and Engineering, PSU, 2008
Seungkyu Lee
(M.S) Electrical engineering department, Penn State University. 2007
Minwoo Park (M.S) Electrical engineering department, Penn State University. 2007
Hays, James (1st-4th Year Ph.D.
student, Computer Science Department 2003-2006)
Harriet Pashley (BS)
Computer Science, CMU, 2005
Conferences
CVPR 2008 IEEE Computer Societry
Conference on Computer Vision and Pattern Recognition,
MICCAI 2008 11th International
Conference on Medical Image Computing and Computer Assisted Intervention, NYC
September 6-10, 2008
ECCV 2008 the 10th European Conference
on Computer Vision,
Quotes
A
quotation from Yan-Xi-Shan (unrelated to Yan-Xi Liu) 
The
requirement of Tai Chi is to be centered, and not reveal to your opponent where
that center is. -- Chen Zhonghua
---
Frank Zappa, The Real Frank Zappa Book
