Zhengyou Zhang

Microsoft Corp., One Microsoft Way, Redmond WA 98052-6399, USA
zhang@microsoft.com

IEEE TAMD has its first Impact Factor: 3.210. Wow!

SIGGRAPH Asia, Singapore, November 28 - December 1, 2012. New Program: Technical Briefs. Successfully completed!

CFP: IEEE TAMD Special Issue on Behavior Understanding and Developmental Robotics, Deadline: May 15, 2013

Principal Researcher and Research Manager at Microsoft Research (MSR), Redmond, USA. My research is in computer vision, speech signal processing, multi-sensory fusion, multimedia computing, real-time collaboration and human-machine interaction. I manage the Multimedia, Interaction, and Communication (MIC) Group.I was affiliated with the Communication and Collaboration Systems Group,and the Speech Technology Group.

Research interests Computer vision and graphics: calibration, matching, stereo, motion, 3D modeling, 3D display Audio processing and rendering, speech processing, spatial audio, multichannel AEC Audio-visual fusion, active object detection and tracking Multimedia, human-computer interaction, human-human communication and collaboration Biology-inspired learning, autonomous mental development Human information processing: face/speaker recognition/verification, activity recognition and understanding.

Full publication list is available through Google Scholar.

Recent publications and some downloadable papers are available from here.

Please visit my home page at INRIA for information prior to my arrival (March 30, 1998) at Microsoft Research.

Education

• B.S. degree in electronic engineering from the Zhejiang University, China, in 1985.
• M.S. degree (DEA) in computer science from the University of Nancy, France, in 1987. Advisor: Jean-Paul Haton
• Ph.D. degree in computer science from the University of Paris XI, Orsay, France, in 1990. Advisor: Olivier Faugeras
• D.Sc. (Habilitation à diriger des recherches) from the University of Paris XI, Orsay, France, in 1994.

Short Bio

Full version of his résumé is available by clicking here.

Zhengyou Zhang is a Fellow of the Institute of Electrical and Electronic Engineers (IEEE). He is the Founding Editor-in-Chief of the newly established IEEE Transactions on Autonomous Mental Development (IEEE T-AMD), and is on the Editorial Board of the International Journal of Computer Vision (IJCV), the Machine Vision and Applications, and the Journal of Computer Science and Technology (JCST). He was on the Editorial Board of the IEEE Transactions on Pattern Analysis and Machine Intelligence (IEEE T-PAMI) from 1999 to 2005, the IEEE Transactions on Multimedia (IEEE T-MM) from 2004 to 2009, the International Journal of Pattern Recognition and Artificial Intelligence (IJPRAI) from 1997 to 2008, among others. He is listed in Who's Who in the World,  Who's Who in America and Who's Who in Science and Engineering.

Before joining Microsoft, Zhengyou worked at INRIA (French National Institute for Research in Computer Science and Control) for 11 years, and was a Senior Research Scientist since 1991, where he worked in the Computer Vision and Robotics group. In 1996-1997, he spent one-year sabbatical as an Invited Researcher at the Advanced Telecommunications Research Institute International (ATR), Kyoto, Japan.

He holds about 100 US patents and has about 20 patents pending. He also holds a few Japanese patents for his inventions during his sabbatical at ATR.

He has published over 200 papers in refereed international journals and conferences, and is the author of the following books

• 3D Dynamic Scene Analysis: A Stereo Based Approach (with O. Faugeras) (Springer, Berlin, Heidelberg, 1992). ISBN 3-540-55429-7 & ISBN 0-387-55429-7. Preview available at here.
• Epipolar Geometry in Stereo, Motion and Object Recognition: A Unified Approach (with G. Xu, forewords by O. Faugeras and S. Tsuji; Telecom Systems Technical Award, The Japan Telecommunications Advancement Foundation) (Kluwer Academic Publishers, 1996). ISBN 0-7923-4199-6. Preview available at here.
• Computer Vision: Fundamentals of Computational Theory and Algorithms (in Chinese) (with S. Ma) (Chinese Academy of Sciences, 1998; Second edition, 2003). ISBN 7-03-006070-9. The experimental data described in the appendix can be downloaded here (7.84MB).
• Face Detection and Adaptation (with C. Zhang) (Morgan and Claypool, 2010). ISBN-10 160845133X. Available from Amazon.
• Face Geometry and Appearance Modeling (with Z. Liu; Foreword by Demetri Terzopoulos) (Cambridge University Press, 2011). Available at Amazon.

He is the Chair of the new Technical Briefs program of the SIGGRAPH Asia, Singapore, November 28 - December 1, 2012.

He is a co-organizer of the Second International Workshop on Human Activity Understanding from 3D Data (HAU3D) 2012, in conjunction with the IEEE Conference on Computer Vision and Pattern Recognition (CVPR), Providence, Rhode Island, June 16-21, 2012.

He was a General Co-Chair of the International Workshop on Multimedia Signal Processing (MMSP 2011), October 2011, Hangzhou, China.

He was a co-organizer of the International Workshop on Human Activity Understanding from 3D Data (HAU3D) 2011, in conjunction with the IEEE Conference on Computer Vision and Pattern Recognition (CVPR) Colorado Springs, June 20-25, 2011.

He was a Program Co-Chair of the International Conference on Multimedia and Expo (ICME), July 2010, a Program Co-Chair of the ACM International Conference on Multimedia (ACM MM), October 2010, and a Program Co-Chair of the ACM International Conference on Multimodal Interfaces (ICMI), November 2010. He was the Program Co-Chair of the 8th International Conference on Development and Learning (ICDL09), June 5-7, 2009, Shanghai, China. He was a Technical Co-Chair of the International Workshop on Multimedia Signal Processing (MMSP06), October 3-6, 2006, Victoria, BC, Canada. He was the Program Co-Chair of the Asian Conference on Computer Vision (ACCV2004), Jan. 27-30, 2004, Jeju Island, Korea; a Demo Chair and an Area Chair of the International Conference on Computer Vision (ICCV2003), Oct. 14-17, 2003, Nice, France; the Demo Chair of the International Conference on Computer Vision (ICCV2005), Oct. 15-21, 2005, Beijing, China. He co-organized the International Workshop on Multimedia Technologies in E-Learning and Collaboration, held in Nice, France, on October 17, 2003. He served on the Program Committees of ICCV, CVPR, ECCV, ACCV and many other international conferences and workshops.

Zhengyou Zhang is a member of the IEEE Computer Society Fellows Committee from 2005 to 2007, and in 2010 and 2011, a member of IEEE Technical Committee on Multimedia Signal Processing (2006-2010) and the ex-Chair of IEEE Technical Committee on Autonomous Mental Development (2007-2009). He is a member of ACM.

Interview by the Computational Intelligence Magazine is available here (or go to IEEE Xplore).

Interview by the IEEE Signal Processing Magazine on "Telepresence: Virtual Reality in the Real World" is available here (or go to IEEE Xplore). (November 2011)

Natural User Interfaces: What's Next?. Video on 3D Photorealistic Talking Head.(Februray 2011)

IEEE Transactions on Autonomous Mental Development (IEEE TAMD)

• Submission information available here.
• Table of Contents with Abstracts and Links to PDF files available here.

Projects

• Camera calibration
• Structure from motion and 3D reconstruction
• Face modeling
• Re-rendering from a sparse set of images
• Visual Panel: Virtual mouse, keyboard and joystick
• Visual Screen: Virtual touch screen
• Eye-gaze-corrected video conferencing
• Whiteboard and meeting capture
• Distributed Meetings and Microsoft RoundTable
• Multi-sensory speech processing
• Projector-Camera System and Visual Echo Cancellation
• Active Camera and Event Analysis
• Multimodal Presence Detection
• Human Action and Activity Recognition
• Virtual Lighting
• Speaker Verification: Text-Dependent vs. Text-Independent
• Face Verification: Image-Based vs. Video-Based
• Facial Expression Recognition
• Microphone Array and Sound Source Localization
• Multimodal Active Speaker Detection
• Spatial Audio Conferencing and Multichannel Acoustical Echo Cancellation
• Microphone Array Audio Spatialization
• Personal Telepresence Station

Software Microsoft Easy Camera Calibration Tool

• The executable for Windows is available here.
• Technical report in PDF (only 653KB)
• Click here for an example with real data.

Tutorial

Parameter Estimation Techniques: A Tutorial with Application to Conic Fitting. PDF version, HTML version, and PostScript version
Published in Image and Vision Computing Journal, Vol.15, No.1, pages 59-76, 1997.

Recent publications: Click here

My h-number (or h-index)

Full publication list is available through Google Scholar.

Some downloadable publications:

• C. Zhang, Q. Cai, P. Chou, Z. Zhang, and R. Martin-Brualla, "Viewport: A Fully Distributed Immersive Teleconferencing System with Infrared Dot Pattern", IEEE MultiMedia, Vol. 20, No. 1, pages 17-27, 2013.
  available from IEEE or from  http://research.microsoft.com/~zhang/Papers/Viewport-IEEE-Multimedia-2003.pdf
• Z. Zhang, "Microsoft Kinect Sensor and Its Effect", IEEE MultiMedia, Vol. 19, No. 2, pages 4-12, April-June 2012.
  available from IEEE or from  http://research.microsoft.com/~zhang/Papers/Microsoft Kinect Sensor and Its Effect - IEEE MM 2012.pdf
• Z. Zhang, "Estimating Projective Transformation Matrix (Collineation, Homography)", Microsoft Research Technical Report MSR-TR-2010-63, May 2010.
  available at  http://research.microsoft.com/apps/pubs/?id=131928
• Z. Zhang, "Camera Calibration",   Chapter 2, pages 4-43, in G. Medioni and S.B. Kang, eds., Emergin Topics in Computer Vision, Prentice Hall Professional Technical Reference, 2004.
  This book chapter provides an overview of various camera calibration techniques, including using 3D calibration appratus, 3D planar pattern, 1D linear points, and just points from the environment (0D). Available at Camera Calibration - book chapter.pdf
• Z. Zhang, "A flexible new technique for camera calibration",   IEEE Transactions on Pattern Analysis and Machine Intelligence, Vol.22, No.11, pages 1330-1334, 2000.
  The calibration paper with free moving 2D pattern, available as Technical Report MSR-TR-98-71
• Z. Zhang, "Camera Calibration with One-Dimensional Objects",   IEEE Transactions on Pattern Analysis and Machine Intelligence, Vol.26, No.7, pages 892-899, 2004.
  doi:10.1109/TPAMI.2004.21, available from IEEE or from http://research.microsoft.com/~zhang/Papers/ZhangPAMI-04-07-Calib-1D.pdf
• Z Zhang, O. Faugeras, R. Deriche, "An Effective Technique for Calibrating a Binocular Stereo Through Projective Reconstruction Using Both a Calibration Object and the Environment",   Videre: Journal of Computer Vision Research, MIT Press, Vol.1, No.1, pages 58-68, 1997.
  available at http://research.microsoft.com/~zhang/Papers/videre97-stereo-calibration.pdf
• Z Zhang and V. Schenk, "Self-Maintaining Camera Calibration Over Time",   Proc. IEEE Conference on Computer Vision and Pattern Recognition, pages 231-236, Puerto Rico, June 1997.
  available at http://research.microsoft.com/~zhang/Papers/CVPR1997-Self-Maintaining Camera Calibration Over Time.pdf
• Z. Zhang, "Determining the epipolar geometry and its uncertainty: A review",  International Journal of Computer Vision, Vol.27, No.2, pages 161-198, 1998.
  available at http://research.microsoft.com/~zhang/Papers/IJCV-Review.pdf 
• Z. Zhang, "On the optimization criteria used in two-view motion analysis", IEEE Transactions on Pattern Analysis and Machine Intelligence, Vol.20, No.7, pages 717-729, 1998.
  available here.
• Z. Zhang and C. Loop, "Estimating the Fundamental Matrix by Transforming Image Points in Projective Space", Computer Vision and Image Understanding, Vol.82, No.2, pages 174-180, 2001.
  available from CVIU link. or from here.
• Z. Zhang, O.D. Faugeras, "Determining motion from 3D line segment matches: a comparative study", Image and Vision Computing, 9(1):10-19, 1991.
  available from Elsevier or at http://research.microsoft.com/~zhang/Papers/Determining Motion from 3D Line Segments-A Comparative Study.pdf
• Z. Zhang, R. Deriche, O. Faugeras, Q.-T. Luong, "A Robust Technique for Matching Two Uncalibrated Images Through the Recovery of the Unknown Epipolar Geometry",  Artificial Intelligence Journal, Vol.78, pages 87-119, October 1995.
  available at http://research.microsoft.com/~zhang/Papers/ZhangAIJ95.pdf
• Z. Zhang, G. Xu, "A Unified Theory of Uncalibrated Stereo for Both Perspective and Affine Cameras", Journal of Mathematical Imaging and Vision, Vol.9, No.3, pages 213-229, November 1998.
  available at http://research.microsoft.com/~zhang/Papers/JMIV98.pdf
• Z. Zhang, "Iterative Point Matching for Registration of Free-Form Curves and Surfaces", International Journal of Computer Vision, Vol.13, No.2, pages 119-152, 1994.
  The ICP paper available at http://research.microsoft.com/~zhang/Papers/IJCV-94-ICP.pdf 
• Z. Zhang, O. Faugeras, "Estimation of Displacements from Two 3-D Frames Obtained From Stereo",   IEEE Transactions on Pattern Analysis and Machine Intelligence, Vol.14, No.12, pages 1141-1156, 1992.
  available at http://research.microsoft.com/~zhang/Papers/ZhangPAMI-92-12.pdf
• Z. Zhang, O. Faugeras, "A 3D World Model Builder with a Mobile Robot", International Journal of Robotics Research, Vol.11, No.4, pages 269-285, August 1992.
  available at Papers/ZhangIJRR-92-RR-1546-World Model Builder.pdf
• Z Zhang, "Motion and Structure From Two Perspective Views: From Essential Parameters to Euclidean Motion Via Fundamental Matrix",   Journal of the Optical Society of America A, Vol.14, no.11, pages 2938-2950, 1997.
  available at http://research.microsoft.com/~zhang/Papers/ZhangJOSA-97.pdf
• C. Wu, C. Liu, H.-Y. Shum, Y.-Q. Xu, and Z. Zhang, "Automatic Eyeglasses Removal from Face Images'', IEEE Trans. Pattern Analysis and Machine Intelligence, 26(3):322-336, 2004.
  available from IEEE or at http://research.microsoft.com/~zhang/Papers/PAMI - Eyeglasses Removal.pdf
• Z. Zhang, "Feature-Based Facial Expression Recognition: Sensitivity Analysis and Experiments With a Multi-Layer Perceptron",   International Journal of Pattern Recognition and Artificial Intelligence, Vol.13, No.6, pages 893-911, 1999.
  available at http://research.microsoft.com/~zhang/Papers/IJPRAI.pdf or ftp://ftp.inria.fr/INRIA/publication/dienst/RR-3354.pdf
• Z. Zhang, Z. Liu, D. Adler, M.F. Cohen, E. Hanson, and Y. Shan, "Robust and Rapid Generation of Animated Faces From Video Images: A Model-Based Modeling Approach", International Journal of Computer Vision, Vol.58, No.1, pages 93-119, June 2004.
  available at http://research.microsoft.com/~zhang/Papers/IJCV04-Face.pdf
• I. Shimizu, Z. Zhang, S. Akamatsu, and K. Deguchi,"Head pose determination from one image using a generic model",   Proc. 3rd International Conference on Automatic Face and Gesture Recognition (FG'98), pages 100-105, Nara, Japan, April 1998.
  available at http://research.microsoft.com/~zhang/Papers/FG1998-HeadPoseFromOneImage.pdf
• Z. Zhang, and L. He, "Whiteboard Scanning and Image Enhancement",   Digital Signal Processing, Vol.17, No.2, pages 414-432, 2007.
  available from Elsevier or at http://research.microsoft.com/~zhang/Papers/ZhangHeDSP07.pdf
• Z. Zhang, "Image-based geometrically-correct photorealistic scene/object modeling (IBPhM): A review",   Proc. 3rd Asian Conf. on Computer Vision (ACCV 1998), pages 340-349, Hong Kong, January 8-11, 1998.
  available at http://research.microsoft.com/~zhang/Papers/ACCV98.pdf
• K Nishino, Z Zhang, K Ikeuchi, "Determining Reflectance Parameters and Illumination Distribution from a Sparse Set of Images for View-dependent Image Synthesis ",   Proc. International Conference on Computer Vision (ICCV 2001), Vol. I, pages 599-606, Vancouver, Canada, July 2001.
  available at http://research.microsoft.com/~zhang/Papers/ICCV01-Reflectance.PDF
• O. Faugeras, P. Fua, B. Hotz, R. Ma, L. Robert, M. Thonnat, and Z. Zhang, "Quantitative and Qualitative Comparison of Some Area and Feature-based Stereo Algorithms", In Wolfgang Forstner and Stephan Ruwiedel, editors, Robust Computer Vision: Quality of Vision Algorithms, pages 1--26. Wichmann,Karlsruhe, Germany, 1992.
  available at http://research.microsoft.com/~zhang/Papers/comp-stereo.pdf
• Z. Zhang, Y. Wu, and Z. Liu, "Side Statistics and Maximum Discriminant Analysis for Real-Time Tracking", Proc. Asian Conference on Computer Vision (ACCV 2002), pages 308-313, Melbourne, Australia, January 2002.
  available here
• Z. Liu, M. Cohen, D. Bhatnagar, R. Cutler, and Z. Zhang, "Head-size Equalization for Improved Visual Perception in Video Conferencing", IEEE Transactions on Multimedia, Vol.9, No.7, pages 1520-1527, 2007. Available at http://research.microsoft.com/~zhang/papers/Headsize equalization - TMM07.pdf
• Y. Wu, Z. Zhang, T.S. Huang, and J.Y. Lin, "Multibody Grouping via Orthogonal Subspace Decomposition",  Proc. IEEE Conf. Computer Vision and Pattern Recognition (CVPR'01), Kauai, Hawaii, Vol.II, pages 252--257, December 2001.
  available from IEEE or at http://research.microsoft.com/~zhang/Papers/Multibody Grouping - CVPR01.pdf
• C. Zhang, D. Florencio, D. Ba, and Z. Zhang, "Maximum Likelihood Sound Source Localization and Beamforming for Directional Microphone Arrays in Distributed Meetings", IEEE Transactions on Multimedia, Vol.10, No.3, Pages 538-548, 2008. Available at http://research.microsoft.com/~zhang/Papers/ML-SSL-IEEE-TMM.pdf.
• C. Zhang, P. Yin, Y. Rui, R. Cutler, P. Viola, X. Sun, N. Pinto, and Z. Zhang, "Boosting-Based Multimodal Speaker Detection for Distributed Meeting Videos", IEEE Transactions on Multimedia, Vol.10, No.8, pages 1541-1552, 2008. Available at http://research.microsoft.com/~zhang/Papers/SpeakerDetection-IEEE-TMM.pdf. 
• W. Li, Z. Zhang, and Z. Liu, "Action Recognition Based on A Bag of 3D Points", in Proc. IEEE International Workshop on CVPR for Human Communicative Behavior Analysis (CVPR4HB), pages 9-14, San Francisco, CA, USA, June 18, 2010. PDF file.
• W. Li, Z. Zhang, and Z. Liu, "Expandable Data-Driven Graphical Modeling of Human Actions Based on Salient Postures", IEEE Transaction on Circuits and Systems for Video Technology, Vol.18 No.11, pages 1499-1510, 2008. PDF file
• W. Lin, M.-T, Sun, R. Poovendran, Z. Zhang, ``Group event detection with a varying number of group members for video surveillance'', IEEE Trans. Circuits and Systems for Video Technology, vol. 20, issue. 8, pp.1057--1067, 2010. PDF File.
• W. Lin, M.-T. Sun, R. Poovandran, and Z. Zhang, "Activity Recognition Using A Combination of Category Components And Local Models for Video Surveillance", IEEE Transaction on Circuits and Systems for Video Technology, Vol.18, No.8, pages 1128-1139, 2008. PDF file
• A. Subramanya, Z. Zhang, Z. Liu, and A. Acero, "Multisensory Processing for Speech Enhancement and Magnitude-Normalized Spectra for Speech Modeling", Speech Communication, Vol. 50, pp 228-243, 2008. PDF File.

Collaborators, Post-Doctoral Researchers and Students

Zicheng Liu (Researcher, MSR)
Mike Sinclair (Principal Researcher, MSR)
Li-wei He (Research Engineer, MSR)
Cha Zhang (Researcher, MSR)
Rajesh Hegde (Research Engineer, MSR)
Dinei Florencio (Researcher, MSR)
Qin Cai (Research Engineer, MSR)
Wei-ge Chen (Software Architect, MSR)
Phil Chou (Principal Researcher, MSR)
Ying Shan (Post-Doc, now Scientist at Microsoft Online)
Gang Hua (Scientist at Nokia Research)
Ming-Ting Sun (Professor, University of Washington)
Wanqing Li (Associate Professor, University of Wollongong)
Chunhui Zhang (Researcher, MSR Asia, now at Alibaba)
John Hershey (Post-Doc, now at IBM Research)
Interns: Sasa Junuzovic (2008), Matt Luciw (2008), Aswin Sankaranarayanan (2008), Xiaogang Wang (2008), Qing Zhang (2008), Raffay Hamid (2007), Sasa Junuzovic (2007), Miao Liao (2007), Mingxuan Sun (2007), Qi Zhao (2007), Amar Subramanya (2006), Sasa Junuzovic (2006), Ming Liu (2005), Gang Hua (2005), Amar Subramanya (2004), Ya Chang (2004), Yanli Zheng (2003), Hanning Zhou (2003), Guodong Guo (2002), Ruigang Yang (2001), Ying Wu (2000), Ko Nishino (1999, 2000), Qifa ke (1998)

Supervision of researchers when I was at INRIA: Nassir Navab (Ph.D., 1993), Michel Buffa (Ph.D., 1993), Gabriella Csurka (Ph.D., 1996), Bernard Hotz (Research Engineer, 1991-1994), Serge Saracco (Master, 1993),  Jean-Francois Ponthieux (Master, 1993), Veit Schenk (Master, 1996), Laurence Lucido (Ph.D., 1997), Sylvain Bougnoux (Ph.D., 1998).

What's new?

• Interview by the IEEE Signal Processing Magazine on "Telepresence: Virtual Reality in the Real World" is available here (or go to IEEE Xplore). (November 2011)
• Natural User Interfaces: What's Next?. Video on 3D Photorealistic Talking Head.(Februray 2011)
• Editorial for the inaugural issue of the IEEE Transactions on Autonomous Mental Development (or go to IEEE Xplore). (May 2009)
• Microsoft Research Feature Story: Making Virtual Meeting Feel Real. (March 2009)
• Interview by the Computational Intelligence Magazine is available here (or go to IEEE Xplore). (Februray 2009)
• Recent publications:
  • J. Weng, B. Scassellati, and Z. Zhang, editors, Special Issue on Autonomous Mental Development: Mind, Body and Beyond, International Journal of Humanoid Robotics (IJHR), Vol. 4, No. 2, June 2007.
  • M. Liao, R. Yang, and Z. Zhang, "Robust and Accurate Visual Echo Cancelation in a Full-duplex Projector-camera System", IEEE Transactions on Pattern Analysis and Machine Intelligence, Vol. 30, No. 10, pages 1831-1840, 2008.
  • A. Subramanya, Z. Zhang, Z. Liu, and A. Acero, "Multisensory Processing for Speech Enhancement and Magnitude-Normalized Spectra for Speech Modeling", Speech Communication, Vol. 50, pp 228-243, 2008.
  • C. Zhang, D. Florencio and Z. Zhang, "Maximum Likelihood Sound Source Localization and Beamforming for Directional Microphone Arrays in Distributed Meetings", IEEE Transactions on Multimedia, Vol. 10, No. 3, pages 538-548, Apr. 2008.
  • Z. Liu, M. Cohen, D. Bhatnagar, R. Cutler, and Z. Zhang, "Head-size Equalization for Improved Visual Perception in Video Conferencing", IEEE Transactions on Multimedia, Vol.9, No.7, pages 1520-1527, 2007.
• Report "Whiteboard Scanning and Image Enhancement" available in PDF (3.5MB).
• Paper "Vision-based Interaction with Fingers and Papers" available in PDF (945KB).
• Report "Why Take Notes? Use the Whiteboard Capture System" available in PDF (2.2MB).
• Report  "Camera Calibration with One-Dimensional Objects" available in PDF (2.4MB).
• Report "Eye Gaze Correction with Stereovision for Video Tele-Conferencing" available in PDF (4.6MB).
• Report "Model-based Head Pose Tracking With Stereovision" available in PDF (3.6MB).
• Report "Robust and Rapid Generation of Animated Faces From Video Images: A Model-Based Modeling Approach" available in PDF (13MB)
• Report "Visual Panel: From an ordinary paper to a wireless and mobile input device" available in PDF (0.95MB)

Misc links

• Personal pictures
• Tuan's pictures on China
• Ming-Yue's ultimate shop for life
• My daughter Rosaline's "Green Living 4 All" blog
• Rosaline's video "Hope for Kids - We are the World", produced for Amnesty International