.pcx
The filename extension for Paintbrush files.
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.
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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
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.