26
Hue & Saturation
- allow you to adjust the hue and saturation of its
pixels in an image while keeping the brightness level unchanged.
Hue is the wavelength of light reflected directly from an image, and it is
represented by the name of colors. Adjusting the hue changes the whole
color appearance of the image. Saturation is the strength of the color,
referring to how far the color is from a gray of equal intensity. Adjusting
the saturation changes the degree of the purity in proportion to the hue.
Hue adjustment:
In the “Hue” box, specify an angle value (you can either directly enter the
desired value in the edit box or use the scroll bar to select your desired
value). The specified angle value represents a move around the color
wheel. (Remember that hues are specified as angles on the color wheel. If
you are not familiar with the notation of color wheel, please refer to any
relevant book about color.)
Saturation adjustment:
In the “Saturation” box, specify a desired percentage value of the
saturation. A value of –100 converts the image completely to a grayscale
image and a value of +100 shows the image with fully saturated hues.
A will be marked on the lower right-hand corner of the icon as a
reminder if you change the default setting.
