Canon CanoScan FB 630U User Manual page 79

Glossary
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Glossary
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Pixel
An acronym for "picture element," a pixel is the smallest element
used to create a screen image. It can contain up to 24 bits of color
information.
Platen
The scanner's document glass, where originals are placed for
scanning.
Preset Curves
A set of curves designed to fix common photographic image
problems such as underexposure, overexposure, or low contrast.
Preview Area
The area located to the left of the ScanGear CS main window
where the image is displayed before the scan occurs. When you
click the Preview button, the image on the scanner is scanned into
the Preview Area, but not acquired by the application.
Preview Image Cache
When the preview image cache feature is switched on, the image
in the Preview Area is saved and displayed the next time ScanGear
CS is launched from the parent software application. To switch
this feature on and off, open the Preferences sheet and click the
button for "Saved image will be displayed".
Proportion
The ratio of width to height. When you click the Keep Proportions
button, the image size is maintained in the same proportion
whenever you change either the width or the height.
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