The Iterative refocus command line utility can be used to sharpen images
acquired by a defocused camera, blurred with gaussian or any combination
of these degradations. In cases of severe blur it produces much better
results than plug-ins such as sharpen or unsharp mask.

This utility works only with PNM image format (PPM, PGM)

Use `refocit -h' for help.

There are a few nice features of this utility, especially adaptive/static area
smoothing used to remove the so called "ringing" effect introduced by edges in
the image and effects introduced by noise. Two boundary conditions can be used
(mirror boundaries / periodical boundaries). The algorithm is based on finding
the minimum of the error function using Hopfield neural network.
There are a few NOT nice features of this utility as well, namely its memory
and CPU requirements.

If you have any problems or requests please mail me.

Lukas Kunc <Lukas.Kunc@seznam.cz>

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Thanks to Ernst Lippe <ernstl@users.sourceforge.net> for making his Refocus
Gimp plug-in and all authors of the GIMP.