7 - 24 USING YOUR MACHINE WITH A MACINTOSH®
Color Type
Black & White—Set the image type to Black and White for text or line
art. For photographic images, set the image type to Gray (Error
diffusion) or True Gray.
Gray (Error Diffusion)—is used for documents with photographi c
images or graphics. (Err or Diffusion is a method for creati ng
simulated gray images b y placing black dots ins tead of the true gray
dots in a specific matrix instead of true gray dots.)
True Gray—is used for documents with ph otographic images or
graphics. This mode is more exact because it uses up to 256 shades
of gray. It requires the most memory and takes the longest transfer
time.
Colors—Choose either 8-bit Color, which scans up to 8-bit Color or
24-bit color which scans up to 16.8 million colors. Although using
24-bit color creates an image with the most accurate colors, the
image file will be about three times l arger than a fil e created with 8-bi t
Color.