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Colour Adjustment button
Click the Colour Adjustment button, and the Colour Adjustment
dialog box will appear:
Colour Adjustment is another
convenient tool that you can use to
adjust and calibrate the Colours in an
image. This function works much like
the Colour Balance tool, but it
provides another way to control the
property of image Colours.
The Colour Adjustment tool uses
three control items: Hue, Saturation
and Lightness. Hue is a characteristic
that distinguishes one Colour from
another, while Saturation decides the
intensity of a Colour. Lightness is
used to measure the amount of
brightness in a Colour. The lighter a
Colour is, the higher lightness it has.
Colour Wheel
Colour Wheel is used to specify the hue and saturation of
the colour you want to use. Move your mouse cursor on
the Colour Wheel and then click on it. Drag within the
Colour Wheel to select the hue of the Colour you want to
use. The distance from the centre of the wheel decides the
saturation of the colour: the farther you drag your mouse
cursor from the centre of the Colour Wheel, the higher the
saturation.
Lightness Bar
You can drag the triangle below the Lightness Bar to adjust
the lightness of the colour you choose. To increase the
lightness, drag the triangle to the right. Otherwise, drag the
triangle to the left to reduce the lightness.
Entry Box
While you drag within the Colour Wheel to choose the hue
and saturation of colour or drag the triangle below the
Lightness Bar to specify the lightness of colour, the related
information will also be shown in the Entry Boxes. You can
also enter the values here directly.