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dots per inch (dpi)
the number of dots, or pixels, for each inch of the original that
you scanned. See also resolution.
driver
the program that handles the basic operations of the scanner.
final scan The very last scan you make of the original after you have
prescanned and adjusted other settings, such as brightness or
contrast.
gamma curve
The line that represents the value of the tones of the original
versus the value of the tones of the scanned image. A gamma
value of 1 means no adjustment – the scanned image will look
the same as the original. If you alter the gamma curve you can
affect the middle range of tones without drastically altering the
brightest or darkest parts of the image.
grayscale image
One of four possible image types. When you choose grayscale
as the image type, your scanner will produce an image
containing only shades of gray. Choose grayscale if the original
you are scanning is a black and white photo, or if you want the
scanned image to look like a black and white photo. See also
color image, halftone image, line art image.
halftone image
One of four possible image types. When you choose halftone
as the image type, your scanner will mix black and white to give
the illusion of tone, just as in a newspaper photo. See also color
image, halftone image, line art image.
highlight the light areas of an image.
image type Refers to the kind of original you are scanning (e.g. text vs.
photo) or to the type of image you would like to produce. See
color image, grayscale image, halftone image, line art image.