IMAGING GLOSSARYHSL (color imaging)
Hue Saturation, and Lightness.
A method that describes any color as a triplet of real values. The hue
represents the color or wavelength of the color. It is sometimes called tone
and is commonly known as color.
The hue is taken from the standard color wheel and is calibrated in
degrees.
Saturation is the depth of the color and states how gray the color is. It
is a real valued parameter from 0.0 to 1.0 with 0.0 indicating full gray and
1.0 representing pure hue.
Lightness determines how black or white a color is. It ranges from 0.0 to
1.0 but with 0.0 representing black and 1.0 white. A lightness of 0.5 is a
pure hue.
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