Loading ...
Loading ...
Loading ...
By selecting individual color channels on the tone curve, adjustments to the overall color
of an image can be made. This can be used to eliminate unnatural color casts or add
warmth to a picture.
If the image is too red, green, or blue, simply drag the
corresponding color-channel curve down until the
color appears natural. If the color cast is
predominantly one of the secondary colors, cyan,
magenta, or yellow, move the curve of the
complementary color up. For example, if the image is
too yellow, move the blue curve up, see the color
example on page 2. For more on color, see page 35.
51
The contrast of an image can be
changed. The light blue 45° line on
the tone-curve graph represents the
original contrast of the image.
Making the angle of the tone curve
greater than 45° will increase the
contrast of the image. Making the
angle less than 45° will reduce the
contrast.
Increasing contrast
With the RGB channel selected, click on the tone
curve near the top and bottom to add two nodes.
Slightly move the top node up and the bottom
node down. This will increase the angle of the
central portion of the tone curve and increase the
contrast of the image without making an overall
change in image brightness.
Correcting color
Loading ...
Loading ...
Loading ...