Canon MultiPASS F20 Software User's Manual page 144

printer driver
Software that sends printing instructions to a printer. The printer driver
keeps track of the attributes of a printer and the codes a program must
send to access those attributes.
T
threshold
In a bilevel (single bit) image, the point at which a gray pixel is
determined to become black or white.
TWAIN
Both a protocol and an application programmer's interface (API) that
allows you to input image data directly from any source (for example:
desktop and handheld scanners, video capture boards, digital cameras,
and other imaging equipment) without requiring you to switch out of the
application. It provides compatibility between image input devices and
applications by acting as the liaison between hardware devices and
software applications. Because your printer supports TWAIN, you can
use the scanning features of the printer with any Windows application
that supports TWAIN. Twain, the industry standard, was developed by
the TWAIN working group which consists of representatives from many
leaders in the scanner hardware and software industry.
U
USB
Universal Serial Bus (USB) is a connectivity specification for attaching
peripherals to computers. It eliminates the need to install cards into
dedicated computer slots and reconfigure the system.
W
WIA
Windows Image Acquisition is a standard for downloading images from
scanners and digital cameras. The MultiPASS Suite includes a TWAIN-
compliant driver and a WIA-compliant driver. If you are using Windows
98/Me/2000/XP, ScanGear, which is TWAIN-compliant, will be
installed. If you are using Windows XP, both the WIA driver and
ScanGear will be installed. Both of these drivers allow you to use a printer
to scan documents to Windows applications, such as PhotoShop, that
support a TWAIN interface.
Glossary 140