Acer Film Scanner, Руководство пользователя

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Curve button
The Curve tool is used to adjust the brightness properties of
midtone pixels in an image. The following dialogue box will
appear after you click this button:
Below is an introduction to each
component in the dialog box and how to
use the Curve tool to adjust an image:
Color Channel box
Use this box to select the color channel to be adjusted.
This allows you to adjust the curve property of each color
channel respectively.
To three color channel simultaneously, choose Master
channel.
Tonal Map
The x-axis in the Tonal Map represents the input
brightness level of the pixels in an image, and the
y-axis represents the output brightness level of the
image. By clicking and dragging the curve to
change its shape, you can adjust the difference
between input and output brightness level of an
image without making too much modification to the
dark and bright areas. If we compare the following
images and their Tonal Maps: