Advantage I-200 User's Guide download pdf (Page 37)

36 A-61520 April 2005

When using Adaptive Thresholding, Threshold and Contrast may be

adjusted. Contrast values may range from 1 to 100. A Contrast

value of 100 is considered fully adaptive thresholding.

Dithering  a method used to simulate gray levels. When selected,

the Dithering options are available.

• 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.

Contrast %  sets the image contrast by adjusting the difference

between black-and-white, thereby making an image sharper or softer.

Contrast is only available for binary images.

In a low contrast setting, the difference between black-and-white is

small, so the image is softer. In a high contrast setting, the difference

between black-and-white is large, so the image is clearer. Select a

contrast value from 1 to 100. The default is 50.

Manual  is always selected for binary images. Adjust the Contrast

setting by dragging the Contrast sliding bar to the left or right to achieve

the desired Contrast setting. Scan the document to check the contrast.

Automatic — not available for i200 Series Scanners.

Fixed thresholding ATP disabled ATP enabled

Contrast 1

Contrast 60

Contrast 100

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Advantage I-200 User's Guide Page 37