Thanks Paul, But what I'm asking is independent of any sharpening process. I'm seeking the magnification @ which you view the image and make a keep/discard determination.
Kenneth Waller -----Original Message----- From: [EMAIL PROTECTED] Subject: RE: OT: digital image editing My experience supports what Rob has said. Most of my prints are 11 x 17 at 360 dpi from converted *istD RAW files. I find that the optimum sharpening numbers for printing vary only a bit. I sometimes fuss over sharpening at 100% or 200% but find I end up at almost exactly the same place every time. How MUCH sharpening one applies is partly a matter of personal taste. For a well exposed file shot at 200 ISO, my optimum numbers of unsharp mask (assuming no sharpening during conversion) are 260% at 1 pixel with a threshold of 11. Paul > Rob, > ok, but at what magnification do you make the sharp/keep or not > sharp/discard/fix determination. > Inquiring mind wants to know. > > Kenneth Waller > > -----Original Message----- > From: Rob Studdert <[EMAIL PROTECTED]> > Subject: RE: OT: digital image editing > > On 4 Aug 2005 at 17:18, Shel Belinkoff wrote: > > > It's not just for digital shooters. many Photoshop experts suggest > > sharpening the final image @ 100% or 200% of the final print size to better > > determine the actual sharpness of the final result and to get a closer > > approximation of what the final print will look like. If one is making a > 10x14 > > print, it makes no sense to sharpen based on a small, screen-sized image, > > just > > as when sharpening an image for the web it makes no sense to sharpen a 40MB > TIF > > file. > > I don't really subscribe to the sharpen per image theory. I have found that > when printing files of a similar resolution and quality to a specific printer > it's generally easy to experimentally determine the optimum sharpening > factors > for various print sizes. Once the factors have been determined it's easy to > apply optimum sharpening blind. > > Variation in sharpening factors are generally only called for due to file > resolution changes relating to cropping or image stitching and again tests > can > be made for several variations to determine optimum sharpening factors for > the > irregular conditions. It's really not rocket science and I'd bet few people > have the ability to truly interpret how an image will be rendered in print > based on a screen view at 100% or any other factor. > > Cheers, > > > Rob Studdert > HURSTVILLE AUSTRALIA > Tel +61-2-9554-4110 > UTC(GMT) +10 Hours > [EMAIL PROTECTED] > http://members.ozemail.com.au/~distudio/publications/ > Pentax user since 1986, PDMLer since 1998 > > > > ________________________________________ > PeoplePC Online > A better way to Internet > http://www.peoplepc.com > ________________________________________ PeoplePC Online A better way to Internet http://www.peoplepc.com
