Xref: utzoo comp.graphics:5775 sci.astro:4145
Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!purdue!ames!ucsd!helios.ee.lbl.gov!nosc!humu!uhccux!lupton
From: lupton@uhccux.uhcc.hawaii.edu (Robert Lupton)
Newsgroups: comp.graphics,sci.astro
Subject: Re: Reconstruction of blurred images...
Message-ID: <3985@uhccux.uhcc.hawaii.edu>
Date: 20 May 89 23:24:01 GMT
References: <579@rna.UUCP> <5300011@ux1.cso.uiuc.edu> <29246@ucbvax.BERKELEY.EDU>
Reply-To: lupton@uhccux.UUCP (Robert Lupton)
Organization: University of Hawaii
Lines: 10


The problem of de-blurring images is pretty standard, and pretty hard. The
naive solution (for a constant PSF) of deconvolving by dividing in the
Fourier domain usually fails horribly. The problem is that the FT of the image
usually dissapears into noise, and the noise is amplified. If you want
to do better you have to use some constraints (such as the object is
positive everywhere, or bounded by a circle). Various techniques are
around, such as Jansson's (sp?) and Maximum Entropy. The rule of thumb in
astronomy is that you can gain about a factor of 2 in resolution.

			Robert