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GRASP Seminar Series: Spring 2005
March 25, 11:00 AM, Levine Hall 307.
Ioannis Stamos
Director of the Vision & Graphics Laboratory, Asst Professor in Department
of Computer Science, Hunter College, CUNY.
“Photorealistic 3D Modeling of Large-Scale Scenes: Integration of 3D Range and 2D Intensity Sensing in a Complete System”
Abstract: We are building a system that can automatically acquire 3D range scans and 2D images to build geometrically and photometrically correct 3D models of urban environments. A major bottleneck in the process of 3D scene acquisition is the automated registration of a large number of geometrically complex 3D range scans and high-resolution 2D images in a common frame of reference. We have developed novel methods for the accurate and efficient registration of a large number of 3D range scans. The methods utilize range segmentation and feature extraction algorithms. We have also developed a context-sensitive user interface to overcome problems emerging from scene symmetry. Finally, we developed efficient algorithms for the 3D range to 2D image registration problem in urban scene settings. These algorithms calibrate each 2D camera and compute an optimized transformation between the 2D images and 3D range scans. A mesh-simplification method of the final 3D model based on the segmentation results of each range image has been produced as well. The generated 3D representations are useful for urban planning, historical preservation, or entertainment applications.
Biography: Ioannis Stamos is an assistant professor of computer science and director of the Vision & Graphics Laboratory at Hunter College of the City University of New York (2001 present). He is also a member of the doctoral faculty of the Graduate Center of CUNY. His research interests include 3D segmentation, range to image registration and 3D modeling. Stamos received a PhD, an MPhil and an MS in computer science from Columbia University. He received an Engineering Diploma in computer engineering & informatics from the University of Patras, Greece. Stamos is a recipient of the Faculty Early Career Development Award (CAREER) by the National Science Foundation.
