Ok, Paul. I do concur with your conclusion; and in practice, do what you suggest. From a theoretical point of view, I was just curious about the answer to the question given that so many in the discussion were arguing that if one sent the printer a file with less than its native resolution the printer would perform an interpolation using nearest neighbor techniques which would lower the quality of the output but did not mention the effect of the oposite case where one sent a file that had a resoution higher than the printer's native resolution. Thus, leaving open the question as to which theoretically would be the best option to take if one were to have a choice - e.g., letting the printer upsample to its native resolution or downsample to its native resolution.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Paul D. DeRocco Sent: Thursday, October 23, 2003 12:09 AM To: [EMAIL PROTECTED] Subject: [filmscanners] RE: Pixels and Prints > From: LAURIE SOLOMON > > We may be miscommunicating. The native optical resolution of my Umax > PowerLook III is 1200 ppi and for my film scanner around 2780 ppi for 35mm > and 1100 for 120 films. If, for the sake of the argument, I > want the size > of the image to be 1:1 at those resolutions, I would be sending > the printer > a file whose resolution is more than the printer's native > resolution, which > means that the printer would be downsampling the file without any extra > effort at altering the resolution on my part. Thus my question is it > preferable to send the printer images whose unaltered native > resolutions are > higher than the printer's native resolution of 720/360 ppi or to send the > printer images whose unaltered native resolutions are lower than the > printer's native resolution of 720/360 ppi. In practice, I think it's a tangled mass of relatively unimportant trade-offs, with no clear answer. Scanning at high resolution reduces the danger of aliasing in the scanner, but increases the danger of aliasing in the printer. The best would be to scan at the highest resolution, and then use software with a good resampling algorithm to resample to the optimum resolution of the printer, or some integer submultiple. -- Ciao, Paul D. DeRocco Paul mailto:[EMAIL PROTECTED] ---------------------------------------------------------------------------- ------------ Unsubscribe by mail to [EMAIL PROTECTED], with 'unsubscribe filmscanners' or 'unsubscribe filmscanners_digest' (as appropriate) in the message title or body --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.528 / Virus Database: 324 - Release Date: 10/16/2003 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.528 / Virus Database: 324 - Release Date: 10/16/2003 ---------------------------------------------------------------------------------------- Unsubscribe by mail to [EMAIL PROTECTED], with 'unsubscribe filmscanners' or 'unsubscribe filmscanners_digest' (as appropriate) in the message title or body
