The  Weizmann  Institute  of  Science
                  Faculty of Mathematics and Computer Science

                          Vision and Robotics Seminar

                                   Yael Moses
                            Interdisciplinary Center

                                 will speak on

                            Shape Reconstruction  of
                       3D  Bilaterally Symmetric Objects

Methods for general shape reconstruction usually rely on either geometric or
photometric constraints. There are severe limitations to each of these
methods.  In this study we present a new approach to shape recovery based on
integrating geometric and photometric information. We consider 3D bilaterally
symmetric objects of smooth surfaces.  We assume an unknown distant point light
source, Lambertian surfaces, unknown constant albedo, and weak perspective
projection.  Our method computes the dense correspondence between symmetric
points. In addition, the unknown lighting and viewing parameters are recovered.
The method has been implemented and tested experimentally on both simulated and
real data.

If time permits, I will briefly describe a new project of recovering the
epipolar geometry of smooth surfaces.

This is  joint work with Ilan Shimshoni and Michael Lindenbaum from the

                      The lecture will take place in the
                     Lecture Hall, Room 1, Ziskind Building
                         on Thursday, December 6, 2001
                                    at noon