"The Applications of Uncalibrated Occlusion Junctions"
  - Adrian Broadhurst and Roberto Cipolla 

British Machine Vision Conference (BMVC99)
Nottingham, UK
13-15 September 1999

ABSTRACT

When a scene is viewed from two different viewpoints there are often
regions which are only visible in one of the two views. These occluded
regions give important information about depth discontinuities in the
image.  When a background line is obscured by a foreground object, it
forms a T-junction in the image, and these junction points can be used
to detect occlusion.  

Two algorithms are presented in this paper. The first algorithm uses
the trifocal tensor to automatically locate T-junctions visible in
three views, whilst the second  application uses junction points to
obtain a constraint for the detection of planar surfaces.