Dr. Focus told me he has no interest in burning 1-1/2 hours of CPU time
to sharpen a single image. He is reminded of an old cartoon showing the
skeleton of a programmer sitting at a computer terminal waiting for a
response. Eventually, our cameras will capture wave fronts in a
holographic fashion and be able to reconstruct any image visible from
the original scene. Until then...
Chuck Norcutt
usher99@xxxxxxx wrote:
> Oh,
> I found the site that piqued my interest in the deconvolution
> routine.(R-L iteration).
>
> http://www.clarkvision.com/imagedetail/image-restoration1/index.html
>
> Not even a peep out of Dr. Focus---perhaps he is hibernating as it's
> just tooo cold.
>
> Raw developer seems Mac only but supports Oly well unlike DXO. I
> suppose one could try a "Hackintosh"
> or an emulator if one exists for Leopard. Not sure it is worth the
> hassle factor to try.
> I rememeber when we had Macs in the Lab and I had a Compaq Portable
> 386---the emulation program, application and data fit on one floppy. A
> bit sluggish but was stable and worked OK.
>
> One suspects as the DSP get faster/cheaper the Lens CPU's will fix a
> myriad of sins in the background
> and we may never know. It's already happening with vignetting and
> geometric distortion. They may engineer the optics for easily
> correctable defects and may even use deconvolution eventually to
> enhance apparant resolution.
>
> Mike
>
>
>
>
>
>
> Moose concisely and eloquently pointed out in his article how
> sharperning is almost always beneficial in a digitized image.
>
> http://zone-10.com/cmsm/index.php?option=com_content&task=view&id=149&Itemid=1
>
> I have been interested in deconvolution algorithms as well. I am not
> sure they really qualify as shapening per se though they ameliorate
> blur and increase sharpness independent of cause of blur. One problem
> is that they generally assume the point spre
> ad function (PSF) is
> Gaussian with a variable radius and attempt to undo it with an
> iterative function. There are 3rd party free standing software
> available as well such as Focus Magic, but adding it into the workflow
> is a pain. Thanks for bringing up Raw Developer.
>
> I have always been intrigued by DXO as they use deconvolution
> techniques with prior knowledge of the lens/sensor system focal length,
> focus point etc and have to make many fewer assumptions. I have thought
> of it as free MTF. Their previous raw converter was crummy and an
> Achilles heel. With their stable of optics Ph.D's they should have hit
> it out of the park, but they were slow in making the interface and
> workflow nice to use. Way not worth the price of admission w/o a 100%
> supported body and lens. It is sort of PT lens/Neat Image and
> deconvolution with a raw converter all in one. It is focal length AND
> focus point aware and can also ameliorate CA which may a function of
> both. Nonetheless, a
> carefully Moose processed image with layers of
> Neat image and selective sharpening have looked nicer to me than some
> DXO G9 images which sometimes looked overbaked, despite a trace more
> detail.
> One click on "vivid" from a raw file for some landscapes is quite an
> easy procedure and pretty nice, though burns clock cycles. (The
> newest version can hang some 64 bit Vista boxes too) I may try it a bit
> more and improve the defaults to save time with some lots of images.
> Not=2
> 0too many lately as it is approaching 0deg F here.
>
> Oh, the geometric distortion correction in DXO seems to result in some
> loss of detail too--not sure why. Might be worth a free trial download
> if you have a supported comibination.
> Mike
>
>
>
>
>
>
> Did you try Raw Developer? I know you like SilkyPix but this
> software blows away any RAW software? It also allow you to use ICC
> profiles. I created a custom icc profile with more than 600 color
> patches and then fine tunned it, modifying 3d cluts for perfect skin
> reproduction desaturing this range of hues and the rest of colours with
> an increased colour saturation to emulate Ektachrome E-100G. I am really
> satisfied. ;) Sharpening with this software is also awesome. It allows
> using Richardson-Lucy deconvolution algotrithms!!! They were previously
> used for focusing blurred Hubble images before replacing the faulty
> glass element. You can also use Early stage noise reduction feature. It
> ´s li
> ke modifying E-1 AA filter effectiveness. As you know, it´s very
> common to see labyrinth maze patterns in cameras with weak AA filters
> when sharpening in Raw Processing Workflow. After wasting some weeks
> fine tuning the software options, now I can say without any doubt that
> Olympus Studio weren´t taking E-1 to the limit.
>
--
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