On Oct 22, 2005, at 8:37 AM, Godfrey DiGiorgi wrote:
... If you WANT to print at 330 ppi and make that size print, you need to upsample the DS image file to expand the number of pixels by a factor of 1.65x linearly. The result, if done correctly, should look indistinguishably different from printing at 200 ppi if done well, but might look a little better if processing after the upsampling was done properly.
BTW, if you are planning to make a large number of prints at that sizing and are working from RAW files, it might make sense to develop the RAW conversion and editing workflow such that you upsampled the image on output from the RAW converter. This increases the amount of data the editing application needs to work with, but might make it simpler to visualize the correct edits to improve quality without the added steps of upsampling and reprocessing.
Godfrey
