BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Improving the energy model of stereo matching algorithms - Michael
  Bleyer\, TU Vienna
DTSTART:20101214T100000Z
DTEND:20101214T104500Z
UID:TALK28399@talks.cam.ac.uk
CONTACT:Microsoft Research Cambridge Talks Admins
DESCRIPTION:Global stereo approaches formulate the stereo matching problem
  in terms of an energy function that is subject to optimization. It is kno
 wn that common energy functions represent a suboptimal model of the real p
 roblem so that even a global energy minimum leads to disparity maps of mod
 erate quality. In this talk\, I will present two papers recently published
  at CVPR that focus on improving the energy model. \n\nThe first paper con
 centrates on synergies that exist between the problems of stereo matching 
 and alpha matting.  We formulate both problems in a joint approach and sho
 w that our results are useful for the tasks of novel viewpoint synthesis a
 nd depth segmentation.\n\nIn the second paper\, we model a stereo scene as
  a collection of a few 3D surfaces (planes and B-splines). We argue that t
 his surface-based representation has several advantages over the commonly-
 used disparity-based representation\, where each pixel is directly assigne
 d to a discrete disparity value. In particular\, it allows us (1) to incor
 porate the very popular color segmentation constraint in a soft way\, (2) 
 to formulate a global MDL prior\, (3) to use a simple curvature term and (
 4) to improve occlusion handling. I will briefly mention an extension of t
 his work (currently under review)\, where we use a similar framework to ex
 tract scene objects and model interactions between them.
LOCATION:Small lecture theatre\, Microsoft Research Ltd\, 7 J J Thomson Av
 enue (Off Madingley Road)\, Cambridge
END:VEVENT
END:VCALENDAR