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
Address and Phone Numbers
Dr. Yanxi Liu338B IST Building
Office: (814) 865-7495
Email: yanxi ATsign cse.psu.edu
What's new
2013
Taiji and Advanced Technology for Smart Health Symposium, flyer, Friday, April 26, 2013. Chair and co-organizer.
Four papers (two oral and two poster presentations with 3.2% and 25.2% acceptance rate respectively) from LPAC are accepted for publication at CVPR 2013.
We
organize the 2nd International Competition on “Symmetry
Detection from Real World Images” at CVPR
2013!
New
Student Recruiting: we are always looking for devoted Ph.D. student applicants who are well
versed in CV/CG and PRML in general, and motivated to develop novel/rigorous
algorithms for pattern discovery from real,
large, interdisciplinary data sets in particular.
Teaching
(Spring): Pattern Recognition and Machine
Learning (CSE 583/EE 552), 2:30-3:45pm T/Th, 222 IST
2012
Four
Gold-medalist at The International Chinese Martial
Arts Championship 2012
NSF Award – INSPIRE (CREATIV): Symmetry Group-based
Regularity Perception in Human and Computer Vision
Teaching:
Fall 2012
Theoretical, Computational and Experimental Regularity on
Interdisciplinary, Large Data Sets
(CSE 598D, 2-5pm W, Leonhard 101, #schedule = 946924)
This is a course on computational methods for real
world digital data, that is across scale, modality and
application domains. We aim at automatic pattern discovery, comparison and
learning. The content is based on a unique combination of group theory,
statistical learning theory, and human/animal perception, with an emphasis on discovering
visually appealing patterns automatically and hands-on trainings on large data
sets.
A related course taught last fall: COMPUTATIONAL REGULARITY
Course content will also be drawn from a successful
US NSF and NSFC supported summer school on Vision, Learning and
Pattern Recognition (VLPR 2012) with a theme of “Computer Vision in
Biomedical Image Applications”
This course will not be offered again before 2015.
Computer Graphics (undergraduate/graduate
level, CMPSC 458 4:15-5:30pm TR)
Spring 2012
Pattern Recognition: Principles and Applications
(Graduate Level)
Book: Pattern Recognition and Machine Learning by
Christopher M. Bishop
CSE 583/EE 552 of Spring 2012
Location: 222 IST
Time: Tuesdays and Thursdays from 2:30-3:45 PM.
Tentative syllabus.
Service:
Co-director for the Vision, Learning, and
Pattern Recognition Summer School in Shanghai (VLPR 2012). Sponsors:
US NSF, NSFC, Fudan University, Industry sponsors.
Workshop co-Chair for the 11th Asian
Conference on Computer Vision ACCV 2012
Publication:
Curved Glide-Reflection Symmetry Detection
Seungkyu Lee and Yanxi Liu
The IEEE Transaction on Pattern Analysis
and Machine Intelligence (TPAMI),
February 2012
Volume 34, Number 2, Pages 266-278
[PDF]
[Project
Page]
Statistical Asymmetry-based Brain Tumor Segmentation from 3D MR
Images
Chenping Yu, Guilherme C. S. Ruppert, Dan T.
D. Nguyen, Alexandre X. Falcao,
and Yanxi Liu.
5th
international joint conference on biomedical engineering systems and
technologies, 2012.
[PDF]
Local Expert Forest of Score
Fusion for Video Event Classification
Jingchen Liu, Scott McCloskey
and Yanxi Liu.
European Conference on
Computer Vision (ECCV), pages 1-14.
2011
Service
--
Chair of a CVPR 2011 workshop (June 24, 2011) on
Symmetry
Detection from Real World Images – An NSF supported Competition!
-- Invited Speaker of Cold Spring
Harbor Asia Conference on “High Throughput
Biology”,
Sozhou, China
(April)
--
Invited Instructor for the 3rd Sino-USA Summer School in Vision,
Learning and Pattern Recognition (VLPR2011), Chengdu,
China
Publication
IEEE
TPAMI paper (Manuscript Type: Regular)
Title: Curved
Glide-Reflection Symmetry Detection
Authors:
S. Lee and Y. Liu
On-line
version appears
Radiological Society of North America (RSNA 2011):
Supervised Machine
Learning for Brain Tumor Detection in Structural MRI
Koshy, Yu,
Nguyen (MD), Kashyap, Collins, Liu
A New Symmetry-Based Method For Mid-Sagittal Plane
Extraction In Neuroimages
Guilherme Ruppert and Leonid Teverovskiy
and Chen-Ping Yu and Alexandre Falcão
and Yanxi Liu
IEEE International Symposium on
Biomedical Imaging (ISBI) 2011.
Pages 285-288.
Surveillance
Camera Autocalibration based on Pedestrian Height
Distributions
Jingchen Liu and Robert T. Collins and Yanxi Liu
British Machine Vision Conference (BMVC) 2011. Pages 1-11
First Symmetry
Detection Competition: Summary and Results
Ingmar Rauschert,
Kyle Brocklehurst , Somesh Kashyap,
Jingchen Liu and Yanxi Liu
CSE Dept Technical Report No. CSE11-012, October 2011
Pages 1-17
Teaching
-- New Course (Fall 2011): Computational Regularity, CSE 598G
-- Graduate-level Seminar (Spring):
Pattern Recognition (CSE 583, EE 552)
Textbook:
Pattern Recognition and Machine Learning (Bishop)
2010
Service
--
Organizer of a
full-day ECCV 2010
Tutorial on Computational
Symmetry: Past, Present, Future
-- Invited
speaker/instructor at Computer Vision Summer School VLPR2010
(and VLPR2009).
-- Research Seminar, Chinese University of Hong Kong, University
of Science and Technology, Hong Kong (February, 2010)
Publication
The Survey paper (pdf file, 16MB) on “Computational
Symmetry” is
published in Foundations and Trends in Computer
Graphics and Vision 2010 (Foundations and Trends® in Computer
Graphics and Vision Volume 5 Issue 1-2, pp: 1-195.
DOI: 10.1561/0600000008)
CVPR 2010 papers:
o
Multi-Target
Tracking of Time-varying Spatial Patterns by
Jingchen Liu and Yanxi Liu
o
Data
Driven Mean-Shift Belief Propagation For non-Gaussian MRFs by Minwoo Park,
Somesh Kashyap, Robert T.
Collins and Yanxi Liu
ACCV 2010 papers:
·
Curved
Reflection Symmetry Detection with Self-Validation
Jingchen Liu and Yanxi Liu
·
Image
De-fencing Revisited
Minwoo Park and Kyle Brocklehurst
and Robert T. Collins and Yanxi Liu
·
Translation-Symmetry-based
Perceptual Grouping with Applications to Urban Scenes
Minwoo Park and Kyle Brocklehurst
and Robert T. Collins and Yanxi Liu
-- New PAMI paper
- Skewed Rotation Symmetry
Group Detection (PAMI
preprint) (2010)
Seungkyu Lee and Yanxi Liu
IEEE Transaction on Pattern Analysis and Machine
Intelligence (TPAMI).
Regular Paper. Volume 32, Number 9, Pages 1659 – 1672.
Submitted April
10, 2009, Accepted for publication August 14, 2009. Appeared on-line September, 2009.
Briefs
Faculty
Spotlight of January 2010 Newsletter, PSU, College of Engineering, Department of
Electrical Engineering
My tech talk at Google Google (Mountainview, CA) youtube:
TechTalks at Google (December 2008)
NIPS first Algebraic Methods in
Machine Learning Symposium. (2008) Title: Symmetry Group-based Learning for Regularity Discovery from Real World
Patterns
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!
-- 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
Invited Speaker for Content-based
Image retrieval for Biomedical Image Archives (MICCAI 2007)
Selected Recent Publication
2012
Curved
Glide-Reflection Symmetry Detection
Seungkyu Lee and Yanxi Liu
The IEEE Transaction on Pattern Analysis and Machine Intelligence (TPAMI) 2012
February.
Volume 34, Number 2, Pages 266-278
Statistical Asymmetry-based Brain Tumor Segmentation from
3D MR Images
Chenping Yu, Guilherme C.
S. Ruppert, Dan T. D. Nguyen, Alexandre
X. Falcao, and Yanxi Liu
Proceedings of the 5th International Conference on Bio-inspired Systems and
Signal Processing, 2012
Pages 527-533
Algarve, Portugal; Feb 2012; DOI: 10.5220/0003892205270533
[PDF]
[Project
Page]
2011
A New Symmetry-Based Method For Mid-Sagittal Plane Extraction
In Neuroimages
Guilherme Ruppert and
Leonid Teverovskiy and Chen-Ping Yu and Alexandre Falcão and Yanxi Liu
IEEE International Symposium on Biomedical Imaging (ISBI) 2011
Pages 285-288
[PDF]
[Project
Page]
Surveillance
Camera Autocalibration based on Pedestrian Height
Distributions
Jingchen Liu and Robert T. Collins and Yanxi Liu
British Machine Vision Conference (BMVC) 2011
Pages 1-11
[PDF]
[Video]
2010
A SURVEY
PAPER: Computational Symmetry in Computer Vision and
Computer Graphics
Yanxi Liu and Hagit
Hel-Or and Craig S. Kaplan and Luc Van Gool
Foundations and Trends® in Computer Graphics and Vision 2010
Volume 5
Number 1-2
Pages: 1- 195
[PDF]
[Project Page]
Skewed Rotation Symmetry Group Detection
Seungkyu Lee and Yanxi Liu
Pattern Analysis and Machine Intelligence (PAMI) 2010
Volume 32
Number 9
Pages 1659 - 1672
[PDF]
Translational Symmetry-based Perceptual Grouping with
Applications to Urban Scenes
Minwoo Park and Kyle Brocklehurst
and Robert T. Collins and Yanxi Liu
Asian Conference on Computer Vision (ACCV) 2010
[PDF]
Curved Reflection Symmetry Detection with Self-validation
Jingchen Liu and Yanxi Liu
Asian Conference on Computer Vision (ACCV) 2010
[PDF]
[Project
Page]
Image De-fencing Revisited
Minwoo Park and Kyle Brocklehurst
and Robert T. Collins and Yanxi Liu
Asian Conference on Computer Vision (ACCV) 2010
[PDF]
Multi-Target Tracking of Time-Varying Spatial Patterns
Jingchen Liu and Yanxi Liu
Computer Vision and Pattern Recognition (CVPR) 2010
Pages 1-8
[PDF]
[Project
Page]
[Video]
Data Driven
Mean-Shift Belief Propagation For non-Gaussian MRFs
Minwoo Park and Somesh Kashyap and Robert T. Collins and Yanxi Liu
Computer Vision and Pattern Recognition (CVPR) 2010
Pages 1-8
[PDF]
[Project
Page]
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.
Volume 31
Number 10 October
2009.
[PDF]
[Project
Page]
Curved
Glide-Reflection Symmetry Detection S. Lee and Y. Liu, CVPR
2009 oral presentation. (most viewed, 3262 at sciweavers 10/14/12)
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).
http://vision.cse.psu.edu/research/research.shtml
* 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.
http://vision.cse.psu.edu/research/research.shtml
http://www.cs.cmu.edu/afs/cs.cmu.edu/user/yanxi/www/images/medical_image.html
Teaching
*
Pattern Recognition (and Machine Learning) CSE 583/EE
552 PSU, Spring 2012, Spring 2011 (TA: Jingchen Liu),
Fall 2009 (TA: Minwoo Park), Fall 2008 (TA: Weina Ge)
*
Computer Graphics CSE 458 (CSE 418 2007 and before),
Fall 2011 (TA: Thap Panitanarak),
Fall 2010 (TA: Kyle Brocklehurst), Fall 2009 (TA:
Kyle Brocklehurst), Spring 2009 (TA: Chen-Ping Yu,
TI: Kyle Brocklehurst), Spring 2008 (TA: Roberto Lublinerman), Spring 2007 (TA: Roberto Lublinerman)
*
Computational Regularity, CSE 598G, Fall
2011
*
Machine Learning for Computational
Regularity CSE 598E,
Fall 2009
* Computational
Symmetry
(PSU Fall 2007: CSE 398B) (Course Description))
* 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 (CMU
page)
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
NEW Tea
Green tea 龙井 
竹叶青
Taiji
Taiji
Performance at the Central PA Festival of the Arts (July 12, 2009)
Taiji Performance
at the Central PA Festival of the Arts (July 11, 2010)
PSU Taiji Club
Recent
performance: Pittsburgh Dragon-Boat Festival
Jazzy's
painting and music
竹叶青
