应数学与统计学院邀请，法国里昂中央理工大学Liming Chen教授于2015年4月14至19日访问我校进行科研合作交流活动，在此期间做以下学术报告。
题目：Neutralizing facial expressions in 3D to improve face recognition in 2D
时间：2015年4月15日（星期三） 上午 10:10-12:00
地点：理科楼202
摘要: Expression and pose variations are major challenges for reliable face recognition (FR) in 2D. In this talk, we aim to endow state of the art face recognition SDKs with robustness to simultaneous facial expression variations and pose changes by using an extended 3D Morphable Model (3DMM) which isolates identity variations from those due to facial expressions. Specifically, given a probe with expression, a novel view of the face is generated where the pose is rectified and the expression neutralized. We present two methods of expression neutralization. The first one uses prior knowledge to infer the neutral expression image from an input image. The second method, specifically designed for verification, is based on the transfer of the gallery face expression to the probe. Experiments using rectified and neutralized view with a standard commercial FR SDK on two 2D face databases, namely Multi-PIE and AR, show significant performance improvement of the commercial SDK to deal with expression and pose variations, and demonstrates the effectiveness of the proposed approach. Then, we aim to endow the state of the art FR SDKs with the capabilities to recognize faces in videos. Finally, we present different methods for improving biometric performances for specific cases.
报告人简介：
Prof. Liming Chen was awarded the joint B.Sc. degree in mathematics and computer science from the University of Nantes, Nantes, France, in 1984. He obtained the M.S. and Ph.D. degrees in computer science from the University of Pierre and Marie Curie Paris 6, Paris, France, in 1986 and 1989, respectively. He first served as an Associate Professor at the Université de Technologie de Compiègne, Compiègne, France, and then joined Ecole Centrale de Lyon, Ecully, France, as Professor in 1998, where he leads an advanced research team on multimedia computing and pattern recognition. From 2001 to 2003, he also served as Chief Scientific Officer in a Paris-based company, Avivias, specialized in media asset management. He has been Head of the department of Mathematics and Computer science from 2007. Prof. Liming Chen has taken out 3 patents, authored more than 200 publications and acted as chairman, PC member and reviewer in a number of high profile journal and conferences since 1995. He has been a (co)-principal investigator on a number of research grants from EU FP programme, French research funding bodies and local government departments. His current research interest is computer vision and multimedia, spanning from 2-D/3-D face analysis and recognition, image and video analysis and categorization to affect analysis both in image audio and video. Prof. Liming Chen holds the premium of scientific excellence attributed by the French Ministry of Higher Education and Research since 1995.
