On 9/14/2016 4:16 PM, Wayne Harridge wrote:
Moose, just a query about deconvolution sharpening:
Does the algorithm for deconvolution take into account the lens used ?
Yes - and No.
Yes, there are deconvolution programs out there that are made for specific lenses or have profiles for individual
lenses. If I recall correctly, Canon has added deconvolution profiles for at least some of their lenses to their Raw
converter/editor, DPP. This just started as I was about to get out of Canon, and none of the lenses I used was on the
list. Clever on their part, as it may make a Canon lens more attractive relative to third party lenses.
No, there are at least a couple of deconvolution tools that don't know what lens they are correcting. NeatImage and
Topaz InFocus are the two I know and have used. Both do some sort of analysis when an image is loaded. I forget now, as
I haven't used it in a while, how InFocus puts it. NeatImage 'Detects' "Blur Width (of an edge, in pixels)", and one may
choose anyplace in the image to detect, then watch in a small 100% window what happens as different widths are chosen.
Although interested in some theory, as intellectual exercise, I'm a pragmatist, in that results always trump theory.
These things work, and that's all I really need to know.
MikeG is the one who can answer with much greater theory/math depth.
Convoluted Moose
--
What if the Hokey Pokey *IS* what it's all about?
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|