Kodak i800 Series - Manual (Page 48)

A-61510 January 2005
3-8
When Adaptive Thresholding is selected, Contrast values may
range from 1 to 100. A Contrast value of 100 is considered fully
adaptive thresholding.
Fixed thresholding ATP
disabled
ATP enabled
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.
Error Diffusion  screens photographic areas of a document to
simulate gray levels yet sharpens the edges of text. It is recommended
that error diffusion be used when a mix of text, graphs, pictures and
colors in the documents are being scanned.
NOTE: When using error diffusion and compression together, negative
compression (less than one-to-one) is more likely to occur.
64-Level Bayer Dither, 64-Level 45 Degree Clustered Dot Screen
and 64-Level Dispersed Dot Screen
 these represent alternative
screening options to emulate gray.