Minolta DIMAGE S404 - SOFTWARE Instruction Manual page 35

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.
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.
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 pre-
dominantly 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. For more on color, see page 23.
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