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GL-4
IRAS
Initialization of the hardware.
Landscape orientation
A document is transported and read with the long side vertical to the moving direction.
Letter size
A standard paper size used in the U.S.A. and other countries. Paper size is 8-1/2 x 11
inches.
Linedrawing mode
Selecting linedrawing mode makes threshold and contrast settings effective but prevents
brightness from being set. The specified threshold value determines whether black or
white pixels are scanned. Line drawing mode is therefore appropriate for scanning text
and line art images.
Manual Feed mode = Manual Mode
Requires the operator to feed each document manually into the ADF paper chute.
Manual start mode (<-> automatic start mode)
The reading operation is activated by pressing the START button in this mode. Available
only when video option board is installed.
Mirror image
The read image is symmetrically flipped to produce a mirror image of the original
detected in the main scanning direction.
Noise removal
Isolated noise from an image appearing as black spots in white areas and voids in black
areas is removed to improve image quality.
Operator panel
A panel containing the scanner indicators and buttons. The operator panel is used to
control scanner operations such as loading document, selecting features, and changing
setup options.