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HD Ultra X Service Guide
To turn the picture left (clockwise) or right (counter-clockwise) from the orientation in which it was
scanned.
Runlength Encoding
A method of compressing raster or bitmap data by representing "runs" of white or black dots along a
scanned line as the number of dots in each run. Many variations of this scheme exist, with varying
compression efficiency. Typically, runlength compression formats yield a file 20-25% the size of an
uncompressed file.
Saturation
The level of colorfulness of the picture. A picture with high saturation has vivid color. A black and white
picture has zero saturation. The purity of a color or the degree to which it is diluted with white light. Red is
a highly saturated color. Pink is a diluted red (has lower saturation). Saturation is one attribute of color in
the color space called HSV (Hue Saturation, Value). Saturation is a characteristic indicating the vibrancy
or intensity of a hue. A color with high saturation will appear more intense than the same color with less.
Scale
To reduce or enlarge the size of a picture proportionally.
Scanner Calibration
A program that helps adjust the scanner to achieve stable colors and work with a printer. Calibration gives
better scanning results. The program should be run whenever changing printing equipment, toner, and
inks, and whenever getting poor results when printing pictures.
Screen Calibration
A program that helps adjust the computer screen to get the best display of scanned pictures and
documents. This program is run during installation and should be used again any time that the computer
screen or the lighting around the computer is changed.
SCSI (Small Computer System Interface)
An interface that allows hard disks and other high-performance peripherals to be attached to Macintosh
and PC computer systems.
SCSI Card
The printed circuit card that came with the scanner. With its driver software, the card allows the computer
to talk to the scanner. The card is ASPI compatible with a SCSI-II output connector.
SCSI
Small Computer System Interface. Specification of interface to computer equipment like disks, printers,
scanners etc.
Shadow Detail
The amount of detail contained in the dark parts of an image. It is desirable to maintain shadow detail, but
there is a risk of decreasing overall contrast if one lightens the shadow too much in an attempt to expose
additional detail. If an image is scanned without shadow detail, it will be impossible to re-gain detail using
an image editing program.
Shadow
The darkest part of a picture; reproduced as black onscreen or when printed.
Sharpness
An attribute of a scanned image and also an attribute of scanner quality.
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