When Adaptive Thresholding is selected, Contrast values may range from 1 to 100.
Fixed thresholding ATP | ATP enabled |
disabled | |
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.