Contex SD One+ - Page 63

Service Guide SD One+ 63
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,
run length 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. Specification of interface to computer equipment like disks,
printers, scanners etc.
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.
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 regain 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.