The construction of photo-realistic virtual
worlds is at reach of current computer graphics. Unfortunately, the
philosophy currently adopted for the diffusion of virtual worlds over
the Internet, which calls for downloading at client side the 3D
virtual world description, does not allow several user to share the
same virtual world. Recently, in order to solve this issue, the
split-browser approach, which transforms the problem of interacting
with a virtual worlds in a image transmission task, was proposed.
This work suggests a compression scheme for the stream of images
generated in the split-browser approach. The proposed scheme
decomposes the virtual world as a union of objects which are in turn
approximated as polyhedrons. The image of each face of the polyhedron
is compressed with a MPEG-like approach by predicting it with a projective transformation.
