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Re: Non-linear optimization [message #7430]

Tue, 12 November 1996 00:00

Ken Kump
Messages: 8
Registered: February 1996

Junior Member

Howard Onishi wrote:
> Does anyone know of a source for non-linear optimization codes (in IDL
> of course)? I am particularly interested in image restoration
> techniques such as maximum entropy deconvolution. The problem size is
> on the order of several hundred variables.

Howard,

Someone from the Naval Research Lab wrote a program called superfit.pro,
some years ago. It did a generalized non-linear least-squares fit to
a user-supplied function. This worked for me, but was quite slow. I
have found that for computationally intensive optimization, it is *much*
faster to use a call_external, especially if you are talking about
several hundred variables. I have used NL2SOL, a FORTRAN-based
procedure which is quite flexible and quite well documented. It can
be found at http://netlib.bell-labs.com. I have also used the
Powell-method (Numerical Recipies) in a similar fashion. Good luck.

------
Ken Kump

Department of Biomedical Engineering
Case Western Reserve University
Cleveland, Ohio 44106, USA

E-mail: ksk3@po.cwru.edu

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[Message index]

		Re: Non-linear optimization By: Ken Kump on Tue, 12 November 1996 00:00
		Re: Non-linear optimization By: Craig Markwardt on Tue, 12 November 1996 00:00

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