Microtek ScanWizard EZ, Справочное руководство

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66 Microtek ScanWizard EZ - Professional Mode Reference Manual
Threshold
(for Line Art image only)
For Line Art images, the Threshold tool is the only AIC tool available for use.
Threshold is the dividing line between black and white; the range is 0 to 255,
and the default is 127. Thus, gray levels below the Threshold are converted to
black, while gray levels equal to or above the Threshold are converted to white,
resulting in a high-contrast, black-and-white representation of the image.
Using the Threshold feature:
1. Drag the sliders to change the Threshold.
• To darken the original, drag the slider to the right. This increases the
Threshold value so that more pixels are turned to black, resulting in a
darker image.
• To lighten the original, drag the slider to the left. This lowers the
Threshold value so that more pixels are turned to white, resulting in a
lighter image.
2. Alternatively, you can enter a value in the Threshold edit box to change the
Threshold.
3. The Sharpen option lets you sharpen the Line Art image.