Oce CS193, Руководство пользователя

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8 Application functions
8-4 CS193/CS173/CS163
8.1.1 General information about color
Everybody has an idea of what hue an object has, for example,
an apple is red, a lemon is yellow, and the sky is blue. Hue is the
tint by which the color of an object is classified as red, yellow,
blue, etc.
Brightness is the degree of lightness in a color, as compared
with another color, which makes it a light color or a dark color.
For example, when comparing the yellow of a lemon and the
yellow of a grapefruit, it is obvious that the yellow of the lemon
is brighter. But what about when comparing the yellow of a
lemon and the red of a bean? Obviously, the yellow of the lemon
is brighter. Brightness is this degree of lightness that enables
comparison regardless of the hue.
What makes the difference between the yellow of a lemon and
the yellow of a pear? By saying that the lemon is a more vivid
yellow and the pear is a duller yellow, the difference between
the two colors is stated in terms of saturation, as opposed to
brightness. As opposed to hue and brightness, saturation is the
characteristic that indicates the degree of vividness.