Zhengyou Zhang is a Senior Research Scientist at INRIA (French National Institute for Research in Computer Science and Control) where he works in the Computer Vision and Robotics group.

 He was born in Zhejiang, China, on April first, 1965, and is listed in Who's Who in the World. He received the B.S. degree in electronic engineering from the University of Zhejiang, China, in 1985, the D.E.A. diploma in computer science from the University of Nancy, France, in 1987, the Ph.D. degree in computer science from the University of Paris XI, Orsay, France, in 1990, and the Habilitation à diriger des recherches (Doctor of Science) diploma from the University of Paris XI, in 1994.

 He was a Research Assistant from 1987 to 1990, and a Research Scientist from 1990 to 1991, at INRIA. Since 1991, he is a Senior Research Scientist at INRIA. He is also a Guest Research Professor in Chinese Academy of Sciences since 1994, and a Part-time Professor in Northern Jiaotong University (Beijing, China) since 1996.  From December 1996 to December 1997, he was an Invited Researcher at ATR Human Information Processing Research Laboratories, Japan.  He is a Senior Member of IEEE, an Associate Editor of the International Journal of Pattern Recognition and Artificial Intelligence (IJPRAI), and an Action Editor of Videre: A Journal of Computer Vision Research. His current research interests include computer vision, image-based modeling and graphics, facial image analysis, mobile robotics, dynamic scene analysis and multisensor fusion. He participates in different European and French projects on Computer Vision and Robotics. In particular, he is currently involved in a Research and Development Program Praxitele and two European Esprit Projects "Realise" and "Cumuli".

 He 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
• 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
• Computer Vision: Fundamentals of Computational Theory and Algorithms (in Chinese) (with S. Ma) (Chinese Academy of Sciences, 1998). ISBN 7-03-006070-9

Recent Publications

Softwares for SUN and/or LINUX

• IMAGE-MATCHING
• SFM (motion and structure from motion)
• FMatrix & Fdiff (Different techniques for estimating the fundamental matrix)
• AffineF (for estimating the affine fundamental matrix)

Demonstrations

• A new approach to stereo calibration
• Motion and structure from motion
• Robust image matching and Fundamental matrix estimation
• This is the demonstrations panel of our group

Tutorial on parameter estimation techniques with applications to conic fitting:

HTML version & PostScript version

Video: Click on the image to have more details ...

	Perception tridimensionnelle d'une scène dynamique à partir de la stéréoscopie et du mouvement 3D Dynamic Scene perception from Stereoscopy and Motion  Speech in French, 26 mn 40

  What's new ?

• (15/01/98) FG'98 Paper: Comparison Between Geometry-Based and Gabor-Wavelets-Based Facial Expression Recognition Using Multi-Layer Perceptron. ABSTRACT or PostScript version
• (27/10/97) VIDERE Article: An Effective Technique for Calibrating a Binocular Stereo Through Projective Reconstruction Using Both a Calibration Object and the Environment. 210k PDF and DEMO and DATA
• (14/10/97) ICCV'98 Paper: Modeling Geometric Structure and Illumination Variation of a Scene from Real Images. ABSTRACT or PostScript version
• (14/10/97) ICCV'98 Paper: Euclidean Structure from Uncalibrated Images Using Fuzzy Domain Knowledge: Application to Facial Images Synthesis. ABSTRACT or PostScript version
• (14/10/97) ICCV'98 Paper: Understanding the Relationship Between the Optimization Criteria in Two-View Motion Analysis. ABSTRACT or PostScript version
• (14/10/97) ACCV'98 Paper (Invited): Image-Based Geometrically-Correct Photorealistic Scene/Object Modeling (IBPhM): A Review. ABSTRACT or PostScript version
• (14/10/97) ACCV'98 Paper: A New Multistage Approach to Motion and Structure Estimation by Gradually Enforcing Geometric Constraints. ABSTRACT or PostScript version
• (14/10/97) IJCAI'97 Paper: A General Expression of the Fundamental Matrix for Both Perspective and Affine Cameras. ABSTRACT or PostScript version
• (14/10/97) CVPR'97 Paper: Self-Maintaining Camera Calibration Over Time. ABSTRACT or PostScript version
• Software updated (11/07/97): FMatrix (for estimating the fundamental matrix) (LMedS now uses normalized data in the last step, i.e., we in general have a better initial estimate for least-squares with inliers).
• Software updated (30/06/97): a bug in the Linux version of IMAGE-MATCHING (unable to detect points of interest) is fixed.
• Software: the long awaiting Linux version of IMAGE-MATCHING is available.
• Demo: A new approach to stereo calibration
• Paper: On the Epipolar Geometry Between Two Images With Lens Distortion. ABSTRACT or PostScript version
• Research Report: Determining the Epipolar Geometry and its Uncertainty: A Review. (revised based on the comments from Q.-T. Luong and A. Zisserman) ABSTRACT or PostScript version (to appear in IJCV)