Some recent results in camera calibration and shape reconstruction


November 29, 2005


Marc Pollefeys


University of North Carolina at Chapel Hill


In this talk I will give an overview of some recent work done by my research group in the area of camera calibration and 3D reconstruction. In terms of calibration, I will both address photometric and geometric calibration issues. We have recently developed a robust photometric calibration procedure that estimates exposure changes, the camera response curve and vignetting from images. I will also present a simple linear method for fish-eye and cata-dioptric camera calibration and present a new RANSAC approach suited for dealing with quasi-degenerate data. In terms of reconstruction, I will first present an 3D shape reconstruction approach that uses both silhouette and photoconsistency constraints. In our approach silhouette constraints are enforced exactly, while photoconsistency and smoothness are optimized. Finally, I will address the problem of articulated structure and motion recovery from a single camera stream.


Marc Pollefeys

Marc Pollefeys is an associate professor in the Department of Computer Science at the University of North Carolina at Chapel Hill. Previously he was a postdoctoral researcher at the Katholieke Universiteit Leuven in Belgium, where he also received his M.S. and Ph.D. degrees in 1994 and 1999, respectively. Dr. Pollefeys joined the faculty at UNC-Chapel Hill in July 2002. His main area of research is computer vision. One of his main research goals is to develop flexible approaches to capture visual representations of real world objects, scenes and events. Dr. Pollefeys has received several prizes for his research, including a Marr prize, an NSF CAREER award and a Packard Fellowship. He is the author or co-author of more than 80 peer-reviewed or invited papers. He has organized workshops and courses at major vision and graphics conferences and has served on the program committees of many conferences. Prof. Pollefeys is on the Editorial Board of the IEEE Transactions on Pattern Analysis and Machine Intelligence, the International Journal of Computer Vision and Foundations and Trends in Computer Graphics and Computer Vision.