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Color Characteristics

Color Characteristics

We typically define color by its brightness, the hue and depth of color

Luminance or Brightness
This is the measure of the brightness of the light emitted or reflected by an
object; it depends on the radiant, energy of the color band.

Hue
This is the color sensation produced in an observer due to the presence of
certain wavelengths of color. Each wavelength represents a different hue.

Saturation
This is a measure of color intensity, for example, the difference between
red and pink.

Color Models
Several calm' models have been developed to represent color
mathematically.

Chromacity Model
It is a three-dimensional model with two dimensions, x and y, defining the
color, and the third dimension defining the luminance. It is an additive
model since x and yare added to generate different colors.

RGBModel
RGB means Red Green Blue. This model implements additive theory in
that different intensities of red, green and blue are added to generate
various colors.

HSI Model
The Hue Saturation and Intensity (HSI) model represents an artist's
impression of tint, shade and tone. This model has proved suitable for
image processing for filtering and smoothing images.

CMYK Model
The Cyan, Magenta, Yellow and Black color model is used in desktop
publishing printing devices. It is a color-subtractive model and is best used
in color printing devices only.

YUV Representation
The NTSC developed the YUV three-dimensional color model. 8y -
Luminance Component.