English
30
Curve button
The
Curve
tool is used to adjust the brightness properties of midtone
pixels in an image. Once you click on the Curve button, the following
dialog box will appear:
An introduction to each component in the
dialog box and a description of how to use
the Curve tool to adjust an image follows.
Color Channel box
Use the
Color Channel
box to select the color channel to be
adjusted. This allows you to adjust the curve property of each color
channel respectively.
Tonal Map
The x-axis in the
Tonal Map
represents the input
brightness level of the pixels in an image. 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:
Summary of Contents for Professional Desktop Scanner
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