What is Color Model in Computer Graphics ?
What is Color Model in Computer Graphics ?
There
are basically two color models:-
RGB Model:
The RGB
(red, green & blue) color model is the standard model that is applicable
for Screen elements either in Mobile, tablet, Laptops, computer &
television.
RGB is
also referred to as additive primary colors due to the fact that a 100%
addition of all the colors gives you white as all the light gets reflected back
to the eye.
Additive
colors are used for lighting, video and monitors. It is also applied for designing
work in multimedia applications.
A
digital color image pixel has three numerical RGB values (red, green, blue) to
represent the color. In a pixel, each RGB component is represented by 8 bit.
Three 8 bit (one byte for each of RGB) are called 24 bit color. Each 8 bit RGB
component can have 256 possible values, ranging from 0 to 255. For example:
three values like (255, 110, 0) means (red =255, green= 110, blue=0) to
indicate one orange pixel.
CMYK Model:
The CMYK
(cyan, magenta, yellow, black [k=krypton]) color model is the standard for
offset printing.
The RGB
Model depends on a light source to create color whereas the CMYK Model is based
on the light absorbing quality of ink printed on paper.
In
theory, pure cyan (c), magenta (m) and yellow (y) should combine to absorb all
colors and produce black, for which they are also called subtractive colors.
Because all printing inks contain some impurities, these three inks, actually
produce a muddy brown and must be combined with black (k) ink to produce a true
black.
The
process of combining these inks in order to reproduce color is called a
four-color process printing. In your color artwork is to be printed on paper,
you’re probably going to create it in CMYK.
The
additive and subtractive colors are complimentary colors. Each pair of
subtractive colors creates an additive color.
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