Linjie Luo will present his research seminar/general exam on Thursday May 13 at 2PM in room 302 (note room!). The members of his committee are: Szymon Rusinkiewicz (advisor), Tom Funkhouser, and Adam Finkelstein. Everyone is invited to attend his talk, and those faculty wishing to remain for the oral exam following are welcome to do so. His abstract and reading list follow below. -------------------------------------------------------- ABSTRACT: Texture Reconstruction and Surface Registration in Multi-view Performance Capture Creating high resolution, temporally coherent 3D model sequence in real-time performance capture systems based on multi-view photometric stereo gains increasing interest recently. Accurate correspondences across the captured sequence provide an important basis to improve temporal coherence with useful information from neighboring frames. However correspondence problem is difficult due to the aperture problem, visibility change (occlusion/disocclusion), topology change and inherent ambiguity. In this work, following a previously developed deformation-graph-based coarse matching pass, we use a variant of local ICP algorithm to register adjacent frames in fine scale. To prevent tangential drifting in long sequence, we regularize the correspondences with local isometric constraint. Our result proves effective and robust to local visibility changes. To obtain high resolution and fully texturized models, we resynthesize high resolution detail from normal maps and reconstruct texture by solving Poisson equation on surface. This approach guarantees smooth texture transition between views and optimized coloring in occluded region. READING LIST: [1] Rusinkiewicz, S., and Levoy, M. Efficient Variants of the ICP Algorithm. 3DIM 2001. [2] Chuang, M., Luo, L., Brown, B. J., Rusinkiewicz, S., and Kazhdan, M. Estimating the Laplace-Beltrami Operator by Restricting 3D Functions. SGP 2009 [3] Mitra, N. J., Flury, S., Ovsjanikov, M., Gelfand, N., Guibas, L. J., and Pottmann. Dynamic Geometry Registration. SGP 2007. [4] Wand, M., Jenke, P., Huang, Q., Bokeloh, M., Guibas, L. J., and Schilling, A. Reconstruction of Deforming Geometry from Time-varying Point Clouds. SGP 2007. [5] Nehab, D., Rusinkiewicz, S., Davis, J., Ramamoorthi, R. Efficiently Combining Positions and Normals for Precise 3D Geometry. SIGGRAPH 2005 [6] Sharf, A., Alcantara, D., Lewiner, T., Greif, C., Sheffer, A., Amenta, N., and Cohen-Or, D. Space-time Surface Reconstruction Using Incompressible Flow. SIGGRAPH Asia 2008. [7] Vlasic, D., Peers, P., Baran, I., Debevec, P., Popovic, J., Rusinkiewicz, S., and Matusik, W. Dynamic Shape Capture Using Multi- view Photometric Stereo. SIGGRAPH Asia 2009. [8] Li, H., Adams, B., Guibas, L. J., and Pauly, M. Robust Single-view Geometry and Motion Reconstruction. SIGGRAPH Asia 2009. [9] Chang, W., Zwicker, M. Automatic Registration for Articulated Shapes. SGP 2008. [10] Huang, Q., Adams, B., Wicke, M., and Guibas, L. J. Non-Rigid Registration Under Isometric Deformations. SGP 2008. BOOK: Emanuele Trucco and Alessandro Verri. Introductory Techniques for 3-D Computer Vision. Prentice Hall 1998.