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Precise changes to the tone settings of an image can be made by directly editing the
tone curve. This enables you to make subtle changes to the brightness of only the
shadows or highlights, if desired.
The method is applicable to 8-bit grayscale, 12-bit grayscale, 24-bit color (when
ColorSync™ is off) and 36-bit color images.
The Tone Curve
In the Plug-in module FS Tone Curve
chart, the input is the image received by
Plug-in module FS and the output is the
image displayed on the screen. The Tone
Curve shows the balance between light
and darkness in the input and output.
Color Correction with the Tone Curve
The image can be adjusted by changing the shape of the tone curve.
Color Correction - Tone Curve Settings
S T E P 4
* For the most natural appearance the tone curve should be as smooth as possible.
The changes you make in the tone curve are immediately reflected in the preview
area so you can try many different settings until you achieve the image you want.
If the mid-range tones of the tone curve are
moved down toward the input side its
image will become darker than the shadow
of the output side and the displayed image
will become darker.
Tone curve
Shadow
Highlight
Output
Brightness
Highlight
Shadow
Input Brightness