your final scan. Using these preprocessing controls,
you can change or improve the appearance of the final
output image. To view the Enhancement folder, click
the Enhance tab.
The Enhancement folder
contains two thumbnails of the
prescan image, several control
settings, and a histogram of the
image. Any changes you make to
the control settings will appear in
the sample thumbnail.
If you wish to change the image
that appears in the thumbnails,
drag the Crop Frame in the
Preview window.
If you wish to see the effects of your changes in the
Preview window image, click on the Preview button.
•
Channel Selector
Channel refers to the red,
green, and blue layers that make up a color image.
You can choose to change the channels
individually or choose Master to change all
channels equally and simultaneously. A grayscale
image has only one channel.
•
Highlight Control
The Highlight control
allows you to adjust the
overall amount of brightness in the image.
•
Shadow Control
The Shadow control allows
you to adjust the overall
amount of shadows in the image.
•
Gamma Control
The Gamma control is
used for adjusting the
brightness level in the highlights, midtones, and
shadows of the image. Values of 0.1 to 2.0 will
primarily affect the shadow areas of the image.
Values of 2.1 to 6.0 will primarily affect the
midtone areas, and values of 6.1 to 7.9 will
primarily affect the highlight areas.
•
Auto Button
The Auto button is used to
automatically set the highlights
and shadows based on the histogram of the image.
•
Histogram Button
The histogram is a graph that
shows the distribution of the
brightness levels in the image.
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