1. Chapter 12
COLOR THEORY

2. Overview: Color theory Color spaces Color model Types of Color model
Additive and Subtractive Color model
Mechanism of human eye
Cones and Rods
What is CIE

3. What is Color theory
A color model is an orderly system for creating a whole range of colors from a small set of primary colors.
Color theory is the study of color and its role in art and design

4. Color Spaces
A range of colors can be created by the primary colors of pigment and these colors then define a specific color space.
Color space, is also known as the color model.
It is an abstract mathematical model which simply describes the range of colors typically as 3 or 4 values or color components (e.g. RGB).

5. Color model
A color model is an orderly system for creating a whole range of colors from a small set of primary colors.

6. Two Most Common Color Models
There are several established color models used in computer graphics, but the two most common are the RGB model (Red-Green-Blue) for computer display and the CMYK model (Cyan-Magenta-Yellow-black) for printing.

7. Types of Color model RGB Color Model: Additive color model.
For computer displays.
Uses light to display color.
Colors result from transmitted light.
Red + Green + Blue = White

8. 2) CMYK Color Model: Subtractive color model. For printed material.
Uses ink to display color.
Colors result from reflected light.
Cyan + Magenta + Yellow = Black.

9. The RGB color model is used in hardware applications like PC monitors, cameras and scanners, and also has been used in conventional photography.
The CMY color model is used in color printers, and is also used to describe the printing process itself.

10. Additive color and Subtractive color models
Additive color is color created by mixing light of two or more different colors.
Red, green, and blue are the additive primary colors normally used in additive color system.
Since additive color models display color as a result of light being transmitted, the total absence of light would be perceived as black.

11. A subtractive color model explains the mixing of a limited set of dyes, inks, paint pigments or natural colors to create a wider range of colors.
Subtractive color models display color as a result of light being absorbed (subtracted) by the printing inks.

12. Mechanism of eye in understanding color
When light is reflected off of an object, the light enters the eye through the pupil and is flipped upside down by a clear lens that is just behind the iris.
The image is then projected through the body of the eye and onto the retina which the main stage for where color vision is generated.

13. Cones and Rods
Cones are responsible for daytime vision, color vision and the finer details of the things we look at. Cones are activated by a certain amount of light, which is why we don't see colors in the dark.
Rods are responsible for night vision and handle vision in low light. They allow sight of general shapes and forms.

14. What is CIE color model
The CIE color model is a color space model created by the International Commission on Illumination.
It is also known as the CIE XYZ color space or the CIE 1931 XYZ color space.
The CIE specification is supposed to be able represent every single color the human eye can perceive.