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CHANGING THE TONE CURVES – CONTRAST,
BRIGHTNESS, AND COLOR BALANCE
Changing the shape of a curve changes the output brightness level for each corresponding brightness level. Changing
the shape of the individual R (red), G (green), and B (blue) curves affects the color balance of the image. Changes to
the RGB (overall) curve affect the image contrast and brightness.
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 view the control and preview images
full screen. The Control image will be to the left or
on top.
APPLYING OR CANCELLING CORRECTIONS
Click on to apply the changes.
Click on to close the dialog box without making changes.
Click on to cancel the changes only to the currently selected channel with out
closing the Tone Curves dialog box.
1.Select the color channel you want to
adjust from the channel drop-down list.
• RGB will change brightness and contrast with little
change to color balance.
R will affect red and cyan.
G will affect green and magenta.
B will affect blue and yellow.
• Click on to draw a curve with the mouse.
• Click on to smooth out the final curve.
• This function draws a smooth curve based on the
intersection of the corrected curve through seven input
brightness values; 31, 63, 95, 127, 159, 191, 223, and
255.
Click on the curve to fix an
anchor point. Anchor points
let you modify part of the
curve with little or no effect to
the remaining values.
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