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A-61510 January 2005 3-11
Threshold thresholding is used to convert a grayscale image into a
bi-tonal (1 bit/pixel) image. The thresholding value ranges from 0 to 255.
A low threshold value produces a lighter image, and can be used to
subdue backgrounds and subtle, unneeded information. A high
threshold value produces a darker image, and can be used to help pick
up faint images.
Adjust the Threshold setting by dragging the Threshold sliding bar to the
left or right to achieve the desired Threshold setting. Or you can enter a
value (0 to 255) in the Threshold text box. Scan the document to check
the threshold.
NOTE: This setting works with the Contrast setting. A Contrast setting
of 0 causes the scanner to use fixed thresholding. A Contrast
setting of 100 causes the scanner to use fully-adaptive
thresholding.
200 dpi; 80 Threshold; 20 Contrast 200 dpi; 80 Threshold; 100 Contrast