Professionally involved in the evolution of FFT as applied to medical
imaging technologies, I too was swept up in the hyperbole of that era.
Yes, FFT is solid math which, when applied appropriately to special
situations, can be beneficial. Fundamental perspective then is no less
true now and no less applicable to film photography: GIGO. Garbage
In Garbage Out of the computer. Fundamental concept of imaging
science: you can never alter the intrinsic S/N determined at the time
of acquisition by equipment and technique. You can filter a select
portion of the data spectrum for the most desired signal, but never
change the S/N.
Photoshop provides as much (maybe more) as you will ever obtain from
any of those FFT programs. NOTHING substitutes for sharp lenses, sharp
eye and the technique reminders just posted. Signal can never be
recreated by image POST-manipulation - - - one of the reasons the
publicity on these techniques evaporated.
Enjoy Photoshop (or equivalent ) and your zuikos.
Bill Hunter
On Saturday, August 9, 2003, at 09:27 AM, Ralf Loi wrote:
I reminded that some 20 years ago I read an article on Scientific
American
(the italian version) about digital reconstruction of photo. Using FFT
techniques they were able to transform blurred images from out of
focus or
camera shake into good ones. It is interesting to read today the
devices
they used: my laptop is probably more powerful that their big
computer, and
my scanner does it weight only a fraction of their photomultiplier
used to
digitalize the photos. But the math does non change.
So, anyone knows of a standalone program that I can use to restore the
nice
but blurred photo?
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