Emily, thank you. Richard Cooper ----- Original Message ----- From: "Emily L. Ferguson" <elf@cape.com> To: "List for Photo/Imaging Educators - Professionals - Students" <photoforum@listserver.isc.rit.edu> Sent: Sunday, October 13, 2002 11:59 AM Subject: Re: file formats > There's always some loss in JPEG compression. If you have a choice > it's always best to capture in RAW or Tiff format, but I don't have a > digital so I don't really know anything about it except that with the > pro digitals it's possible to choose and that most newspaper shooters > are capturing in RAW mode. > > Once you get the image into photoshop you might want to resize it to > something as close to physical film size as possible and at the > maximum resolution that your original permits. In other words, if > your captured image is 72 dpi by 24"x18", you could reduce it to 6"x > 4.5" at 288 dpi and the physical file size would stay the same. You > probably will be able to get a decent 5x7 print out of the file on > your inkjet printer and the file would be more than adequate for > sending to the gallery. > > Now, for the gallery your optimal size is nearly always 72 dpi > because monitors function at either 72 or 96 dpi depending on the > platform. PCs are 72 and some Macs are 96, as I understand it. > > So there's never any point in sending a file to the gallery any > bigger than 96 at the most. > > But for best viewing you don't want to send a little tiny picture, > like happened this cycle. So you need to size your image around > 4"x6" at 96 or 72 dpi so we can all see it and comment on it. And > you need to re-jpeg the file your going to submit so that it's tiny > and transmits quickly through the phone lines of the internet. > > Your consumer digital point and shoot will do this just fine, > whichever type of capture you use. > > For storage on your computer or on a CD, however, try to avoid > jpegging anything you actually wish to keep. As I said at the > beginning, jpeg is "lossy" and every time you reopen and resave a > file in jpeg compression you lose some data. This is most obvious > with files that were pretty small to begin with and most consumer > point and shoots don't capture very large files. Large files > generally run from 40 to 100 Meg in the world of pro photography. > > HTH and watch out for QKano. He's addicted to minimizing excess > data in files so they download as fast as possible and probably > doesn't like my header info. > > >
