User`s manual

Reference: The Advanced Image Correction tools 107
Color Correction tool (Native Color Mode only)
The Color Correction tool changes the hue and saturation of an image. You can
also add a color cast to an image by simply moving the pointer to a particular
place on the Wheel, or you can remove an unwanted color cast by moving the
pointer to a complementary color to balance out the tones. For instance, to
remove a greenish cast from your image, move the pointer in the Wheel to the
"red" portion to neutralize the greenish hue of the image. The Color Correction
tool is available only for RGB and indexed color images.
This lets you change the intensity of the hues
(colors) in your image. Use Saturation selectively,
because increasing saturation will increase the
intensity of all hues in the image
To change the
hue of an
image, move
the pointer in
the color
wheel to its
new color
position in the
wheel
The Radius field shows the amount of shift towards a particular color and
works in tandem with the Angle field. The Radius range extends from 0 located
at the center of the Color Wheel and indicating the least concentration of color,
to 1, located at the periphery of the Wheel and indicating the greatest
concentration of color
Example: If your angle is 0˚ (red on the Color Wheel) and the radius is 1, this
results in an intense reddish cast on the entire image.
The Angle-Radius feature works differently from that of the Saturation bar,
which increases the saturation of all hues in the image without tending towards
any particular color cast.
Angle: This shows the angle
of the pointer on the Color
Wheel as measured in
degrees, and a value can
also be entered directly in the
edit box to move the cursor
to any point in the Wheel
Example: 0˚ corresponds to
the color red on the Wheel,
60˚ to the color yellow, 120˚
to the color green, 180˚ to
the color cyan, 240˚ to the
color blue, and 300˚ to the
color magenta
Picker: The Picker lets you
pick a known neutral gray
shade in your image and
adjusts it to a closer, truer
gray. The grays in an image
may have a particular color
cast which can be verified
through the color information
in the Information window
A gray that tends towards a
reddish tint, for instance, will
have its R value skewed
higher than the G and B
values. By using the Picker
on a gray area, the gray is
adjusted so that the RGB
values become
approximately equal