9A-22
A-63054 February 2004
Installation requirements
for binarization
To activate the ability to binarize color images, you must install the binarization
support libraries from the CD supplied with your color scanner.
These libraries
are not installed with Capture Software
.
The binarization support libraries are installed when installing the Host
Diagnostics application for your Color Scanner 3590C or Color Scanner 4500.
Version 2.2.25, or later, of Host Diagnostics is required. To install Host
Diagnostics, you must run the
SETUP.EXE
program located in the
DIAGS
directory on the Scanner CD.
If you have a THR2 board to perform binarization, the Host Diagnostics
application must be installed before executing the installation program
provided with the THR2 board.
Filters tab for the
Scanner 1500 and
Scanner 2500
Threshold
—threshold controls the lightness and darkness of the
background in an image. As the threshold value increases, more of the darker
grays in the image turn black. As the threshold value decreases, fewer darker
grays turn black. Enter a value between 0 and 255. The default is “130.”
Contrast
—contrast enhances the edges contained in a document.
Increasing the contrast level sharpens the image edges. Decreasing the
contrast level softens the image. Enter a value between 0 and 100.
The default is “60.”
Overscan
—provides a small amount of black border to the tops and the
bottoms of scanned images to help prevent any loss of corners due to
document skew. Overscan also makes deskew and auto-crop more reliable.
Any value above “0” enables Overscan. A value of “0” disables Overscan.
Noise filter
—black spots (noise) on an image may result in larger compressed
file sizes and may reduce the rate of OCR recognition. Select None for no
noise reduction or specify a noise reduction level from 1x1 matrix to 6x6
matrix. The default is “2x2 matrix.”
NOTES: Using a larger matrix on documents containing very fine detail (e.g.,
the dot on an “i” in 4-point type) may cause information to be lost.
Noise filter is not available when Dithering or Automatic Threshold
is enabled.
When scanning in duplex mode, the Noise filter setting for the front
and rear Image Setup must be the same. As a result, the Noise filter
setting for the front Image Setup will be used for both the front and
rear images.
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