User`s guide

Basic Scanning
Page 18
gives the best image quality, it also takes up the
most storage space when the image is finally saved
to disk.
◗ 256 Colors —Saves the scanned object as an 8-bit
color image. Although an image scanned with this
option requires only a quarter of the file size it would
if it were scanned with the Color Photo option, only
256 colors can be represented. This option is best
for a color image that doesn’t have as many tones
as a color photograph would, such as a color
drawing.
◗ Black & White Photo —Saves the scanned original
as an 8-bit grayscale image (256 shades).
◗ Black & White Halftone—Saves the scanned object
as a 1-bit halftone image.
A
halftone image is composed of small black and
white dots that give the image the appearance of
having shades of gray. Most black and white
images in a newspaper or magazine are printed as
halftones.
TWAIN.bk : basic.fm5 Page 18 Monday, September 8, 1997 11:30 AM