VASC Seminar Announcement
       =========================

 Date: Friday April 19th
 Time: 2:00pm
 Location: NSH A1507 

 Speaker: Adrian Broadhurst
 Affiliation: University of Cambridge
 Web: http://svr-www.eng.cam.ac.uk/~aeb29

 Title: A Variable Threshold Framework For Space Carving

 Abstract:

This talk presents a new technique for reconstructing the 
three-dimensional shape of an object (or scene) viewed by several
cameras. The scene is represented using an array of small voxels (volume
elements) and the objective is to determine which voxels are solid and
which are empty.

The Space Carving framework (Kutulakos Seitz) is extended, by altering the 
definition of the consistency function, to included a noise threshold 
parameter.  This new definition leads to a new compact representation of ALL 
possible photohulls generated by varying the threshold parameter.  A new 
algorithm is presented that is able to solve for all photohulls 
simultaneously, thus elliminating the need to run the Space Carving 
algorithm many times whilst optimising the noise threshold parameter.

For appointments, please contact Simon Baker (simonb@cs)