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From: royce@uhunix4.uhcc.Hawaii.Edu (Royce Jones)
Subject: SUMMARY: Neural Nets & Remote Sensing Unsupervised Clustering
Message-ID: <CyCMK2.1As@news.Hawaii.Edu>
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Organization: University of Hawaii
Date: Thu, 27 Oct 1994 20:36:01 GMT
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Summary of question
===================================================================
What types of artificial neural networks (besides Kohonen's SOFM)
are suitable for unsupervised clustering of multi-band remotely
sensed data?

Summary of responses
===================================================================
From: Kevin Lowell <lowell@sg2.cr.usgs.gov>
From: Erzsebet Merenyi <erzsebet@lpl.arizona.edu>
From: Chaitanya Tumuluri <tumuluri@mailbox.syr.edu>
From: Isaac Wong <iwong@runner.utsa.edu>

ART: Adaptive Resonance Theory
------------------------------
Carpenter and Grossberg,
"The ART of Adaptive Pattern recognition by a Self-Organizing Neural
Network", Computer, pp 77-88, March 1988.
**********
"A Massively Parallel Architecture for a Self-Organizing Neural Pattern
Recognition Machine", Computer Vision, Graphics and Image Proc. 37,
pp 54-115, 1987.
**********
"ART2: Self-Organization of Stable Category Recognition Codes for
Analog Input Patterns", Applied Optics, pp 4919-4930, 1987.

Other methods
-------------
Apart from Kohonen's SOFM, another unsupervised paradigm for 
clustering data is Dr. Bernd Fritzke's Growing Cell Structures (GCS).
This network does away with the need for a cooling schedule (in terms
of the decaying neighbourhood-range and weight-adaptation paramaters)
and insteads uses the addition and deletion of neurons. As such the 
size of the network is determined dynamically and one does not need to
fix the network size a-priori. 

It is interesting and I would refer you to the following Tech report
for more details:

	ftp anonymously to icsi.berkeley.edu and obtain the following
	file: pub/techreports/1993/tr-93-026.ps.Z
**********
Yiu-fai Wong and Edward Posner, ``A New Clustering Algorithm
Applicable to Multispectral and Polarimetric SAR Images,''
{IEEE Trans. Geoscience and Remote Sensing}, 31, 634-644, 1993.

*** end of text ***

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Aloha.
--
RAJ  (Royce A. Jones)  royce@uhunix.uhcc.hawaii.edu
Geography Department, University of Hawaii
Snail mail: c/o Geographic Decision Systems International (GDSI)
            2800 Woodlawn Drive #244           Phone: (808) 539-3773
            Honolulu, HI  96822-1843             Fax: (808) 539-3775

