E-4 Microtek ScanWizard Pro for Windows
Gamma
The contrast affecting the mid-level grays or midtones of an image. Adjusting the
gamma of an image allows you to change brightness values of the middle range
of gray tones without dramatically altering the
White White
White White
White and
Black Black
Black Black
Black points.
Grayscale
An image type that contains more than just black and white, and includes actual
shades of gray. In a grayscale image, each
pixelpixel
pixelpixel
pixel has more bits of information
encoded in it, allowing more shades to be recorded and shown. 4
bitsbits
bitsbits
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 imagesingle-bit image
single-bit imagesingle-bit image
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 saturation
saturation saturation
saturation, which measures the
intensity of the hue (more red, more green).
ICC
International Color Consortium, a standard committee for color management
that created a standard which attempts to serve as a cross-platform device
profile format to be used to characterize color devices.
Image-editing software
Software that is used to edit images, such as PhotoImpact SE.
Image correction tools
Tools in your scanning software for adjusting the color and quality of images.
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