Microtek ScanWizard EZ Reference Manual page 93

Using the White & Black Point tool:
1. Choose the Channel in which the histogram will be modified.
• If your Image T ype is RGB, select All/Master to modify the tone cur v e in
the red, green, and blue color channels of the image simultaneously; or
select the color channels individually (red, green, blue) to modify that
particular color channel.
• If your Image T ype is Grayscale, only the Gray channel is available for
selection.
2. Move the black and white sliders to new points on the histogram.
• Moving the black slider to the right will yield more contrast in the
highlight areas of the image, so that more detail emerges in the highlight
areas.
• Moving the white slider to the left will yield more contrast in the
shadow areas of the image, so that more detail emerges in the shadow
areas.
Another alternative is to simply click the Auto button, so that the
dynamic range for the image is deter m ined automatically.
3. When the changes are done, click OK.
For more details on the effects of the other action buttons, see the section
The Action Buttons.
Microtek ScanWizard EZ - Professional Mode Reference Manual 53