I have submitted photos for a book chapter to the editor, who e-mailed me, saying,"All the photos you sent me are too low resolution to use in a book. They are all 72 dpi, 640 x 480 pixels per inch (ppi). The publisher prints at 300 ppi." I don't know how to do this- do I search iPhoto, Preview, or what?
PowerBook G4, Mac OS X (10.4.8), 1.33 GHz PowerPC, 1.25 GB DDR SDRAM
first off see See www.rideau-info.com/photos/mythdpi.html - The Myth of DPI for additional information.
So to print a 300 DPI photo you need to know the pirnt size and multiply them by 300 - so a 4"x6" photo would need to be 1200x1800 pixels to print at 300 DPI
for a 640x480 photo to print at 300 DPI it would have to be a 2.133"x1.6" print
LN
Well, how do I send the .jpgs to her via e-mail so that she has her 300ppi print, without knowing the end size of the print, which she did not give me? Is there a place on Mail to adjust for attachments? Can I do something in Preview? I've asked for clarification, and frankly am not going to be able to re-take the pictures. This is the entire e-mail:
"All the photos you sent me are too low resolution to use in a book. They are all 72 dpi, 640 x 480 pixels per inch (ppi). The publisher prints at 300 ppi. So, a 300 x 300 ppi image will print at 1 inch by 1 inch. Your photos would print at about 2 inches by 1.5 inches, which is too small. Something that you might use on a web site or to send to a friend will typically be too low resolution for printing. Digital cameras all have settings on them that let you choose the resolution of the photo--go for the highest possible resolution. Also, some e-mail programs automatically reduce the resolution of a photo when you send it by e-mail, so the originals may be higher resolution. It's worth checking."
All of which may be true, but doesn't tell me how to actually do the thing. How do I check e-mail photo settings?
Well, how do I send the .jpgs to her via e-mail so that she has her 300ppi print, without knowing the end size of the print, which she did not give me?
You can not
PPI (or DPI) is pixels (or Dots) divided by inches - if you do not know the inches you can mot know the PPI - It is like asking what is the actual miles per gallon you got on your last trip without knowing how many miles you drove - it is impossible
Exactly how are you e-mailing the photos? Also Look in the info pane in iPhoto and report the pixel size of the photo.
LN
Resizing photos to 300ppi-how can I do it?
