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IMAGE CORRECTION – TONE CURVE
Changing the shape of a correction curve changes the output brightness level for each
corresponding input brightness level. Changing the shape of the red, green, or blue curves
affects colour balance of the image. Changes to the RGB curve affect the image contrast and
brightness.
1. Select the channel you want to adjust from the
colour channel drop-down list.
2. Click on and drag the portion of the curve you
want to change.
• Changes are automatically applied to the
preview image.
Click on to draw a correction curve freehand.
Click on to smooth out the final correction
curve.
Click on the curve to fix an anchor
point. Anchor points let you modify part
of the curve with little or no affect to the
remaining values.
Correcting the Tone Curves
Pull down to
decrease the
output level.
Pull up to
increase the
output level.
Anchor Point
Clicking on draws a
smooth curve based on
the intersect
ion of the
corrected curve through
seven
input brightness
values (31, 63, 95, 127,
159, 191, 223, and 255).
