Archived posting to the Leica Users Group, 2002/07/15
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Thanks Carl, I will try GF again, but was having trouble when using it on medium format images at 4000DPI...seems like the original scan file was too big for it to handle. We'll see...DJ - --- Carl Pultz <cpultz@earthlink.net> wrote: > Darrell, > > Excellent info from Henning, Tina, et al. Thanks! > Scan dpi is not the same > as print dpi. > > Since I have the full up Genuine Fractals, which you > have too, I scan > everything at full res., 2800x2500 pixels or so at > 2700 dpi. (100%) (about > 26 Mb from my Coolscan III) and after getting the > pic just right in > Photoshop, save files in .stn format. That way, I'm > saving 6 - 8 mb files > to disk. That avoids introducing bazaar aliasing > artifacts in the original > scan rendering, which can happen unpredictably at > lower resolution scans. > (That might be the most important aspect of the > higher [2400+ dpi] res > scanners - not the increased per line detail.) I > then choose the print (or > pixel) dimensions with the GF interface when opening > the file. > > I've been using 360 l/mm as an even fraction of the > printer's 1440 res, > like Steve does, though I don't see any difference > between that and 300 > dpi., which I used to use. Just makes sense that > it's easier for the driver > to process. Using the Photoshop algorithms on a tif > file might be just as > good for this degree of resizing, but then you're > saving much larger source > files. > > The key is to scan at 100% @ 4000 dpi. if you want > all the res the machine > can provide. Otherwise, by requesting 4000, or 1440, > at the print > dimensions, you are creating huge files that contain > no additional info, > and your poor computer will plotz. > > I used to scan 2700 dpi at the actual pixel > dimensions I needed (say, 25% > of max., or 700 pixels on one dimension) before I > had a printer and was > just doing web display. Got crisper images than if I > resized from max res > in Photoshop. Haven't compared that to the GF > resizing. Might still be > better to scan at low res for web display, but what > a pain! Much nicer to > have one file to work from. > > CP > > -- > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html __________________________________________________ Do You Yahoo!? Yahoo! Autos - Get free new car price quotes http://autos.yahoo.com - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html