Contrast; Color Balance; Brightness / Threshold; Image Compensation - Nikon Scan User Manual

5. Image Compensation

This chapter explains how to adjust continuous tone brightness,
line art threshold, contrast, and color balance. All these
settings are made using buttons or text edit boxes. The results
of compensation can be checked with a preview scan.
The appearance of the Main dialog box depends on the Media
Type setting, as shown below.
Color Grayscale B&W Line Art

5.1 Brightness / Threshold

This control is used to set the brightness for a Color or
Grayscale image, or the threshold value for a B&W Line Art
image.
When this button is clicked and held down, a slider bar pops
up. The value is set by dragging the slider to the left or right
while holding down the mouse button. The same result can be
achieved by entering a value directly in the box to the right of
the button.
When the slider is dragged in the plus direction, the images will
be brighter and the black point will begin to float above
maximum black. When dragged in the minus direction, the
images will become darker and dimmer.
For a B&W Line Art image, the set value is the threshold value.
Brightness adjustment range:
Threshold adjustment range:
- 31 -
-100 to 100
0 to 255