Filter
Top Products
16 A-61195 July 2003
Image Type
Select the mode you want to use for your scans on the Image Type drop-
down menu.
Black and White—the image appears in black and white with no intermediate
shades of gray. That means that each pixel of the image is either 100% black
or 100% white.
Choose Black and White if you are scanning text or pen and ink drawings.
Since only one bit of black or white information is required per pixel, the
file size of a Black and White image is only about 1/24 the size of a 24-Bit
Color image.
Halftone—a halftone is a picture like that which is usually seen in a
newspaper or magazine. Since a halftone is a type of black-and-white
image, the file size of a halftone image is only about 1/24 the size of a 24-Bit
Color image.
Halftone simulates grayscale by using varying dot sizes. If you view a halftone
image at a certain distance, it looks much like a grayscale image, but the file
size is smaller.
When you select Halftone, a submenu appears that allows you to select a
halftone pattern.
8-Bit Gray—a single-channel image consists of at least 256 shades of gray.
An 8-bit scanner produces a grayscale image with 1024 shades of gray
between pure black and pure white. Choose this option if you are scanning
black-and-white photographs.
With 8 bits of color information per pixel, the file size of an image is eight times
larger than a Black and White image and 1/3 the size of a 24-Bit Color image.
8-Bit Color—an 8-Bit Color image provides 256 color hues in the image.
The file size of a 256 color image is 1/3 the size of a 24-Bit Color image
(TWAIN only).
24-Bit Color—a 24-Bit Color image consists of three 8-bit color channels. The
red, green, and blue channels are mixed together to create a combination of
one billion colors which give a more true-to-life quality to the image. Choose
24-Bit Color if you are scanning color photos.