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.pcx
The filename extension for Paintbrush files.
.pdf
The filename extension for Portable Document Format (PDF) files.
.png
The filename extension for Portable Network Graphics (PNG) files.
.rtf
The filename extension for Rich Text Format files.
.tif
The filename extension for TIFF or TIFF compressed files.
.txt
The filename extension for plain text files.
.wmf
The filename extension for Windows metafiles.
a
acquire
A command offered by programs that support TWAIN. Selecting
Acquire takes you directly to a selected scanning software, and then
returns the scanned image to the requesting program.
active program
The program you are currently using or that is currently selected. A
program’s title bar changes color to distinguish active from inactive
programs.
Active XPA
Or XPA. See transparency adapter.
ADF
See automatic document feeder.
ADF glass
The piece of glass on the scanner bed that the ADF uses to scan
documents from the feeder tray.
aliasing
The visibly jagged steps along angled lines or object edges that result
from sharp tonal contrasts between pixels. Seen in both black-and-
white images and color images. Sometimes called Jaggies.
anti-aliasing
A technique that smooths transitions between pixels, reducing the
jaggedness of curved lines.
approximate size
Reflects the amount of disk space a scan would require if saved to
your computer. Approximate Size value does not apply if the output
type for the scan is set to text; it only applies to an image
representation of the scan.