The  Weizmann  Institute  of  Science
Faculty of Mathematics and Computer Science

Vision and Robotics Seminar

Daphna Weinshall
School of Computer Science and Engineering
Hebrew University

 will speak on

Perspective Unbound: Visionary Rendering

Practically all image rendering methods today use the perspective projection, or try to approximate it. We develop a new image-based rendering approach which is based on a new projection model -- the {\it Two-Slit Camera}. The model is obtained by relaxing the strict requirement of perspective projection, namely, that all projection rays intersect at a single point (the focal-point).
Instead, projection rays are required by definition to intersect two curves in space.

The Two-Slit Camera model allows us to develop image-based rendering techniques that can use much simpler image data, and have reduced storage and computation needs. For example, from an image sequence taken by a side-moving camera we can generate a forward moving sequence. This is done with no computation and no explicit use of 3D scene structure. Moreover, precise information about the camera's internal and external parameters is not essential.  While the images in the synthetic sequences are not perspective, they still look very realistic.  This, we believe, opens the door to the emergence of simpler image-based rendering.

Joint work with: Mi-Suen Lee, Tomas Brodsky, Assaf Zomet, Doron Feldman and Shmuel Peleg.

The lecture will take place in the
Lecture Hall, Room 1, Ziskind Building
on Thursday, January 17, 2002
at noon