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A-61527 May 2006 37
When Adaptive Thresholding is selected, Contrast values may range
from 1 to 100.
Fixed Processing used for black-and-white and other high contrast
documents. A single level is set to determine the black-and-white
transition. The threshold is programmable over the entire density range.
Fixed thresholding sets Contrast to 0. If Fixed Processing is selected,
Contrast is not available.
64-Level Bayer Dither, 64-Level 45 Degree Clustered Dot Screen
and 64-Level Dispersed Dot Screen represent alternative
screening options to emulate a grayscale image.
Noise Filter occasionally small dots or specks appear in the
background of a scanned image. These specks increase file
compression size and usually contain no image information. Using the
Noise Filter on documents containing very fine detail (e.g., the dot on
an "i" in 4-point type) may cause information to be lost. It is
recommended that you do not use Noise Filter when scanning
documents with text smaller than 7-point type.
Noise Filter can be used with bi-tonal images only and is front/rear
independent. Choose (none), Lone Pixel or Majority Rule.
• Lone Pixel reduces random noise on bi-tonal images by converting a
single black pixel surrounded by white to white or by converting a
single white pixel surrounded by black to black.
Fixed thresholding ATP
disabled
ATP enabled