Bob Frost (I believe it was) advocated sending 360ppi or 720ppi files to a 720dpi desktop inkjet printer. It certainly makes intuitive sense that on a 720dpi printer, a 720ppi file would work best. I haven't read anything from other sources (that I consider reliable <wink, wink>) advocating such high resolution for ink-jet printers. Are there some other sources (besides Members Magic Eyes) that cite this?
I know in commercial printing circles where the highest quality work is being done and where stochastic screening with 2540spi and higher devices is used, there isn't a call for more than 300ppi or so of original file resolution. These devices DO use very sophisticated methods to determine spot frequency and placement, so maybe the less-sophisticated ink-jet driver benefits from more resolution. Bob, are you thinking that because bicubic (or whatever) resampling is better than nearest-neighbor resampling that the print driver uses, that it is better to control uppixeling BEFORE the file gets to the print driver? I'm thinking (unsupported by much except navel-gazing) that the print driver has so much to do with the file in converting RGB to CMYK (or CcMmYKk or whatever) and determining where and what size to spurt each drop of ink, that whether it gets one pixel per dot or four pixels per dot won't make any visible difference in printing a photographic image. This leaves out the consideration of other issues related to image quality, particularly Unsharp Masking. I'm wondering whether appropriate USM isn't so much important than additional resolution that discussing one without the other is meaningless. I don't mean this to sound argumentative. I really DON'T know whether the higher res files print better or not, but I AM interesting in learning. I just put more credence in theories and facts than in opinions and uncontrolled observations. Preston Earle [EMAIL PROTECTED] ---------------------------------------------------------------------------------------- Unsubscribe by mail to [EMAIL PROTECTED], with 'unsubscribe filmscanners' or 'unsubscribe filmscanners_digest' (as appropriate) in the message title or body
