The CMY color model is based on the primary colors cyan, magenta, and yellow, which are essential for color printing by absorbing certain light wavelengths. This model allows for a wide range of colors through various combinations, but typically produces a muddy brown instead of true black, leading to the use of the CMYK model to achieve a true black. It is primarily applied in color printing, photography, and graphic design, utilizing layer and ink techniques to create accurate color reproductions.

1. CMY COLOR MODELS

2. CMY Color Model
o The Color model defined with the primary color cyan,
magenta and yellow (CMY) is useful for describing
color output to hard copy devices.
o The Complements of red, green, and blue respectively.
o This System is used for primary for printing.

3. CMY Color Model
o The CMY Color are called the “Subtractive Primaries.
o Cyan, Magenta, and Yellow are the secondary color of
light and the primary color of pigment.
o The White light is reflected from cyan-colored link.
o The Reflected light must have no red component.

4. CMY Color Model
Diagram :

5. How the CMY model work
Cyan (c):
Absorb red light and reflects green and blue light
producing a Cyan color.

6. How the CMY model work
Magenta (M):
Absorb green light and reflect red and blue
light, producing a magenta color.
Yellow (Y):
Absorb blue light and reflect red and green light,
producing a yellow color.

7. CMY Color Model
 When these three color are combined in different
amount they can created a wide range of color.
Cyan + Magenta
Magenta + Yellow
Cyan + Yellow
Cyan + Magenta +Yellow

8. CMY Color Model
 Theoretically should produce black , but in practice, it
produce a muddy brown.
 This is why the CMYK model (Where K stands for black)
is often used in printing to achieve a true black color.
 The CMY model is fundamental in color printing because
it allow printer to create a full spectrum of color using
just three primary color.

9. Printing Process
 The Printing process often used with CMY model a
color point with a collection of four ink dots.
 Some what an RCB monitor uses a collection of
three
Phosphor dots.
 One dot is used for each of the primary color
(Cyan, Magenta and Yellow) and one dot is black.

10. Printing Process
 A Black dot is include because the combination of
Cyan, Magenta and Yellow ink typically produce dark
gray instead of black.
 Some plotter produce different color combination by
spraying the ink for the three primary color over each
other and allowing them to mix before they dry.

11. CMY Color Model
 The CMY color model is primarily applied in the
following area.
Color Printing
Photography
Graphic Design

12. CMY Color Model
 Color printing :
Inkjet Printers
Offset Printers
o Inkjet printers :
Most Inkjet printers are the CMY
model, along with black (CMY) to reproduce
image or text.

13. CMY Color Model
By layering Cyan, Magenta and
Yellow inks in varying proportions, a wide range
of colors can be created.
o Offset Printing:
In commercial printing such as for
magazines, brouchures , and posters, the CMY
model is used in a process called four printing.

14. CMY Color Model
 Photography :
Color Film
Photo Printers
o Color Film :
Traditional photographic film uses
layer sensitive to different colors often
aligned with the CMY model.

15. CMY Color Model
o Photo Printers :
High-end photo printers use CMY
(or CMYK) to produce high-quality
photographic prints with accurate color
reproduction.

16. CMY Color Model
 Graphic Design:
Design Software
o Design Software :
Many graphic design software
application use the CMY or CMYK color
model when designing material for print.

17. CMY Color Model
Designer choose specific Cyan,
Magenta and
Yellow value to achieve desired color in printed
material.
We can express the conversion from an
RCB representation to a CMY representation with
the matrix transformation.

18. CMY Color Model
C 1 R
M = 1 _ C
Y 1 B
Where the white represented in
the RCB system as the unit column vector.
Similarly, we convert from a CMY color
representation to an RCB representation with
the matrix transformation.

19. CMY Color Model
R 1 C
C = 1 _ M
B 1 Y
Where black is represented in the
CMY system as the unit column vector.

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