[comp.parallel] Trees on SIMD and MIMD machines

rponnusa@rodan.acs.syr.edu (Ravi Ponnusamy) (10/23/89)

   hello netters,
	I am interested in implementing binary/quad/octrees in the 
	SIMD and MIMD machines. I would be grateful to you if any of you
	can send me about the articles/papers relevant to the above
	topic.

	thanks in advance.

	ravi. 
	rponnusa@rodan.acs.syr.edu
	rponnusa@sunrise.bitnet

howard@aic.dpl.scg.hac.com (Mike Howard (213)317-5690) (10/25/89)

In article <6855@hubcap.clemson.edu> rponnusa@rodan.acs.syr.edu (Ravi Ponnusamy) writes:
>	I am interested in implementing binary/quad/octrees in the 
>	SIMD and MIMD machines. I would be grateful to you if any of you
>	can send me about the articles/papers relevant to the above
>	topic.

I haven't found much literature on parallel implementations, but here
is a good one:

Hung, Yubin & Azriel Rosenfield, "Parallel Processing of Linear
Quadtrees on a Mesh-Connected Computer", J. Parallel and Distributed
Computing, v.7, pp 1-27 (1989).

It refers to 
Mei, G. and Liu, W. "Parallel processing for quadtree problems",
Proc. Int Conf on Parallel Proc., (1986) PP. 452-4.

Martin, M, Chiarulli, D. M., and Iyengar, S.S, "Parallel processing
of Quadtrees on a horizontally reconfigurable architecture 
computing system." Proc. Int Conf on Par Proc. (1986) pp. 895-902.

I haven't read the last 2.  There are a couple of good articals
from the 1988 Proceedings of the Hypercube conference, I forget
the exact title.  One is "Region Growing on a Hypercube Multi-
processor", by Willebeek-LeMair and Reeves.  However, theirs is
not a regular tree.

I'm doing a kind of quick and dirty system on the hypercube
using a quadtree to represent each region in an image.  I just
implemented Samet's quadtree-building algorithms.  His new books
are just out.  See esp. "Applications of Spatial Data Structures".
However, they do not touch on parallel implementations.

I'd like to know your application.

Mike Howard,  Hughes Research Labs, howard@aic.hrl.hac.com