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, University of Pittsburgh

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, Huazhong University of Science and Technology, China.

 


Address and Phone Numbers

Dr. Yanxi Liu
338B IST Building
University Park, PA 16802

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) youtube: TechTalks at Google

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!

Tartan article on Dr. Liu's Alzheimer's Disease project (in collaboration with the Alzheimer's Disease Research Center of University of Pittsburgh)

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]

Minwoo Park, Yanxi Liu and Robert T. Collins, "Efficient Mean Shift Belief Propagation for Vision Tracking," Computer Vision and Pattern Recognition Conference (CVPR '08)

 

 

[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 NORMAL AND AD/MCI SUBJECTS," 5th IEEE International Symposium on Biomedical Imaging: From Nano to Macro. May 14-17, 2008. Paris, France.

 

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, San Diego, California, IEEE, October 2008.

 

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
E. Chastain and Y. Liu
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, N. Lazar, and Y. Liu
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. Graz, Austria. May, 2006. Demos

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. May, 2006. Poster Page 1, Poster Page 2. A short "fastforward" video. Source code available upon request (jhhays@cs.cmu.edu).


 

 

 

 

 

 

Technical Reports


 

 

 

 

 

Students

CURRENT:

Seungkyu Lee (2nd Year Ph.D. student, Computer Science and Engineering, PSU)

Minwoo Park (2nd Year Ph.D. student, CSE/PSU) co-advising with RT Collins

Somesh Kashyap (MS student, EE/PSU)

Kyle Brocklehurst (undergraduate student, CSE/PSU)

Teverovskiy, Leonid (6th Year Ph.D. student, Machine Learning Department, CMU)

 

 

PAST:

 

Tamara Belkina (B.S. honor thesis) Computer Science and Engineering, PSU, 2008

 

Lin, Wen-Chieh (Ph.D.) CMU RI January 2006, Assistant Professor at National Chiao-Tung University (June 2003 -- Jan. 2006)

 

Zhang, Jiayong (Ph.D.) CMU RI May 2006, Neven Vision, Inc. (2002 -- 2006, Co-advising with Dr. Robert T. Collins)

 

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, Anchorage, June 24-26 2008

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, Marseille, France, October 12-18 2008

NIPS 2008


 

 

 

 

 

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


 

 

 

 

 

 

Without deviation from the norm progress is not possible. In order for one to ``deviate successfully``, one has to have at least a passing acquaintance with whatever norm one expects to deviate from.

 

--- Frank Zappa, The Real Frank Zappa Book


 

 

 

 

 

 

FUN

 

 Taiji

 

Jazzy's painting and music

 

 Jazzy's art gallery (copyright reserved)