Java PCA Transformation

[carmelo]

Hi everybody,
I would like to apply the Principal Component Analysis to an image for
extracting, from a pixel matrix, an eigenvector. Anybody has ever used
any Java library to do that?


Thank you very much in advance
Carmelo

 

[Patricia Shanahan]

Hi everybody,
I would like to apply the Principal Component Analysis to an image for
extracting, from a pixel matrix, an eigenvector. Anybody has ever used
any Java library to do that?

I've done similar things with singular value decomposition. I got faster
results passing the data to Matlab. However, there is a library, Colt,
that does some of its functions in Java. See
http://dsd.lbl.gov/~hoschek/colt/

Patricia

 

[carmelo]

Thank you Patricia for your interesting suggestion.
I'll soon install and try the Colt library. I know that some people
use Matlab for PCA, but I need to use Java because I need to develop a
software. Have you ever used this Colt library? Is there any example
or document with which can I learn how to use the Colt library for
applying the PCA transformation to an image?

Thanking you again
Cheers
Carmelo