036 - Color Diagram and Depth

COLOR DIAGRAM AND DEPTH
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Color is a significant component of computer aided visualization of information, concepts and ideas. The use of color in all applications of computer graphics enhances the image, clarifies the information presented, and helps distinguish features that are obscure in black and white pictures.

Color is all around us. It is a sensation that adds excitement and emotion to our lives. Color plays an important role in the human perception and interpretation of the visual world. Color derives from the spectrum of light interacting in the eye with the spectral sensitivities of the light receptors.

In order to understand color we need a brief overview of light. Without light, there would be no color.

Light is made up of energy waves which are grouped together in what is called a spectrum. Light that appears white to us, such as light from the sun, is actually composed of many colors. The wavelengths of light are not colored, but produce the sensation of color.

The three Color category: Primary colors can be arranged in a circle, commonly refered to as a color wheel. Red, Green and Blue (RGB). In between the primary colors are the secondary colors, Cyan, Magenta and Yellow (CMY). The other mixture of color consider as Tertiary colors.

Types Of Colors

Primary Colors • the pure component colors.
Secondary Colors • equal mixtures of two primary colors.
Tertiary Colors • unequal mixtures of two or more primary colors.

Color Terms

Hue • means color.
Saturation • means amount of a color you apply.
Brightness • How much light you apply.
Transparency • How much you can see trough.
Shades • A shade is produced by dimming a hue.
Tints • A tint is produced by lightening a hue.

Color Diagrams

Color is used to differentiate elements in the diagrams so that the comparative information is read and understood rapidly and accurately. Color visualization techniques increase the amount of information that can be integrated into the visual message or picture, and thus create layers of information.

The 18 basic named colors specification defines by HTML. Platinum added for extra color in the list.

Color

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Name

Maroon
Red
Purple
Fuchsia
Green
Lime
Olive
Yellow
Navy
Blue
Teal
Aqua
Brown
Orange
White
Platinum
Silver
Grey
Black
Hex

#800000
#FF0000
#800080
#FF00FF
#008000
#00FF00
#808000
#FFFF00
#000080
#0000FF
#008080
#00FFFF
#A52A2A
#FFA500
#FFFFFF
#E5E4E2
#C0C0C0
#808080
#000000
Decimal

128,000,000
255,000,000
128,000,128
255,000,255
000,128,000
000,255,000
128,128,000
255,255,000
000,000,128
000,000,255
000,128,128
000,255,255
165,042,042
255,165,000
255,255,255
229,228,226
192,192,192
128,128,128
000,000,000


Evolution Of Color Depth

Number of color contains and supports in 1-bit 2-bit 4-bit 8-bit 24-bit 32-bit 48-bit.

1-bit • 2 colors - Monochrome displays.
2-bit • 4 colors - CGA displays.
4-bit • 16 colors - EGA displays.
8-bit • 256 colors - VGA displays.
16-bit • 65,536 colors - XGA displays.
24-bit • 16,777,216 colors - SVGA displays.
32-bit • 4,294,967,296 color.
48-bit • 281,474,976,710,656 colors.

Today, most computers support at least 32-bit color, allowing for the viewing of high-quality video, including high definition content and some of the newer video games that feature high-end graphics engines.

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