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B-6 Expression 636 Scanner Settings
❏ Color page sequence reading
The scanner scans the document three times (one each for
green, red, and blue), and produces three pages of image
data that combine to give full color image data. Since the
image data can be divided into three sets, a computer with
limited memory or processing speed can handle it more
easily.
❏ Color line sequence reading
The scanner scans the document with one pass of the
carriage, reading green, red, and blue for every line. This
yields more accurate color separation. Because the color for
each pixel can be determined as soon as it is read, the color
correction function can be used.
❏ Monochrome reading (standard)
The scanner scans the same way as in the color line sequence
reading until information is stored into image memory. Then
the scanner makes the monochrome image data from three
primary color image data by using the control circuitry.
❏ Dropout colors (monochrome reading only)
The dropout color is the color you tell the scanner not to
read. You can choose green, red or blue for the dropout
color. Use a dropout color when you do not want to read one
of these colors—for example, when scanning an image on a
colored background.
Halftoning Mode
Halftoning is a process of changing an image to a pattern of dots.
This is required because a printing press produces images in a
different way than photography does.