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

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.

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.

A-61510 January 2005

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