User`s guide

D-3Glossary
Grayscale
An image type that contains more than just black and white, and includes actual shades of gray.
In a grayscale image, each pixel has more bits of information encoded in it, allowing more
shades to be recorded and shown. 4 bits are needed to reproduce up to 16 levels of gray, and 8
bits can reproduce a photo-realistic 256 shades of gray.
Halftone
A type of single-bit image composed of a pattern of black dots that fool the eye into seeing
shades of gray. Examples of halftone images are the pictures you see in a newspaper. These
images usually look very coarse.
Highlights
The lightest portions of an image.
Histogram
A graphic representation of how brightness and darkness pixels are distributed in an image. A
histogram skewed heavily to the left indicates a dark image, while a histogram skewed to the
right indicates a light image.
Hue
The aspect of color that distinguishes it from another color (what makes a color red or green or
blue). Hue is distinct from saturation, which measures the intensity of the hue (more red, more
green).
Image-editing software
Software that is used to edit images, such as Adobe Photoshop.
Image Type
The way you wish an image to be scanned and processed. ScanWizard 5 allows direct scanning
of images into the following image types: RGB color, CMYK color, Lab color, Web/Internet
colors, 256 colors, Grayscale, and Line art.
Interpolated resolution
Resolution enhanced through software; thus also known as software-enhanced resolution. For
instance, if your optical resolution is 300 dpi, you may be able to enhance images up to 600
dpi through software interpolation. Interpolated resolution may capture less detail than the
optical, but it is useful for certain tasks, such as scanning line art or enlarging small originals.
Line art
A type of single-bit image that is just purely black and white, such as a pencil or ink sketch.
Line art may also include one-color images, such as mechanical blueprints or drawings.