Re: Cluster analysis, principal components, regression analysis etc for image segmentation

Hi Andrew,

> Is there anyone else out there working on cluster analysis,
> principal components etc, maybe  for the purpose of image
> segmentation, and would like to share code, test data sets
> etc?

The Java Matrix Package (JAMA) provides a variety of matrix
operations useful for these analyses. For details see:

  http://math.nist.gov/javanumerics/jama/

VisAD provides a way to apply JAMA operations to VisAD Data
objects via its visad.matrix package (this requires that you
install JAMA, of course), as well as support for Fourier
transform and histogram operations via the visad.math package.

These operations are also accessible from Python. See:

  http://www.ssec.wisc.edu/~tomw/visadtutor/matrix.html

for a list (and see Tom's Python tutorial for more general
information. The visad/python/matrix_test.py program is an
example of a simple matrix solution using JAMA.

Cheers,
Bill
----------------------------------------------------------
Bill Hibbard, SSEC, 1225 W. Dayton St., Madison, WI  53706
hibbard@xxxxxxxxxxxxxxxxx  608-263-4427  fax: 608-263-6738
http://www.ssec.wisc.edu/~billh/vis.html