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>I scan at 4000 ppi and print at A4 or A3 (8x10 or 11x16) and only get 480 or >so ppi at A4 and 360 ppi at A3. Yes, but you are scanning a 35mm frame at the 4000 dpi optical and resizing it around 8 times to 8x10 which gives and effective optical dpi of around what you suggest; however, some either are scanning larger formats at 2000 plus optical dpi which are then resized by only 1/2 the amount you are doing to get an 8x10 with an optical dpi of around 1000 plus effective dpi or are scanining an 8x10 print on a flatbed at 1200 optical dpi or greater and not resixing the image at all to get a 8x10 output to get an effective optical dpi of around 1200 plus. >Most people have been arguing for years as to whether we should upsample our >images to get them up to 240 ppi or 360 ppi. I think the upsampling argument that you refer to have come mostly from those who originally were scanning for monitor or web consumption and then wanted to also produce hard copies or who were using flatbed scanners to scan snapshot sized prints or even medium and large format films during a period when the better flatbed scanners only had an optical dpi of 300 dpi and at most 600 dpi. Since the current crop of flatbeds are now up to 1200 optical dpi and beyond, the situation has changed somewhat, although there are still many ocassions when one is scanning a small original ( even at 1200 plus optical dpi) and resizing it larger that the effective dpi will go lower than the 240 ppi and 360 ppi so as to raise the issue of resampling. -----Original Message----- From: email@example.com [mailto:firstname.lastname@example.org]On Behalf Of Bob Frost Sent: Monday, June 03, 2002 4:38 AM To: email@example.com Subject: Re: Resolution and Banding How are people getting these incredibly high resolutions images that need downsampling to 720ppi? Most people have been arguing for years as to whether we should upsample our images to get them up to 240 ppi or 360 ppi. I scan at 4000 ppi and print at A4 or A3 (8x10 or 11x16) and only get 480 or so ppi at A4 and 360 ppi at A3. And that's without any serious cropping. Wouldn't it be nice to have the luxury to throw away unnecessary pixels! Bob Frost. ----- Original Message ----- From: <HMSDOC@aol.com> > This may be a naive question...but does this mean that if you have the data > available from high resolution scanning that the best print results would be > obtained by sending the printer an image at 720 or 1440 ppi rather than 300 > or 360? - Turn off HTML mail features. Keep quoted material short. Use accurate subject lines. http://www.leben.com/lists for list instructions. - Turn off HTML mail features. Keep quoted material short. Use accurate subject lines. http://www.leben.com/lists for list instructions.