The  Weizmann  Institute  of  Science
Faculty of Mathematics and Computer Science

Vision and Robotics Seminar

Yoni Wexler
Robotics Research Group
Oxford University

will speak on

Environment and Alpha Matting from Image Sequences

Alpha matting is a technique for combining two layers of video, one on top of the other, by associating an opacity with each foreground pixel. When the layers contain optically active components (e.g. a lens) the background can no longer be composited plainly and a more complex phenomenon needs to be modeled.  Environment matting is a technique for modelling the complex light-transport properties of real-world optically active elements:
transparent, refractive and reflective objects.

In this talk I will show how both these methods can be automated to produce high quality compositing. We compute both alpha and environment maps from multiple images and use them to create new composited images with high quality.

The lecture will take place in the
Lecture Hall, Room 1, Ziskind Building
on Monday, March 25, 2002
at 11:00