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Computer Graphics Presentation Transcript
1.Computer Graphics
2.Topics
Colors
RGB Color Model
CMY Color Model
Intuitive Color Concepts
HSV Color Model
HLS Color Model
Colors
RGB Color Model
CMY Color Model
Intuitive Color Concepts
HSV Color Model
HLS Color Model
3.Colors
4.RGB Color Model
5.The HSB or HSL scheme
6.The RGB Cube
7.RGB Color Model
8.Color Cube
9.CMY Color Model
CMY: Complements of RGB
Used in light absorbing devices
Hardcopy output devices
Subtractive
Color specified by what is subtracted from white light
Cyan absorbs red, magenta absorbs green, and yellow absorbs blue
CMY: Complements of RGB
Used in light absorbing devices
Hardcopy output devices
Subtractive
Color specified by what is subtracted from white light
Cyan absorbs red, magenta absorbs green, and yellow absorbs blue
10.Additive and subtractive color system
11.CMY Color Model
12.Secondary Colors
13.HSV Color Model
14.HSV
The components of the HSV colour space are Hue, Saturation and Value.
Colour is the result of the perception of light at different wavelengths. Usually, we do not experience light at a single wavelength but a blend of waves at different wavelengths. The hue corresponds to the dominant wavelength and determines the type of the colour, for example red, yellow, or blue.
The saturation determines the purity of the colour. High saturation gives
pure colours (narrow wavelength band), while low saturation means
colours mixed with a lot of white (white light combines all the visible
wavelengths).
The value determines the brightness. A value equal to zero represents
absence of light, while a high value gives bright colours.
The components of the HSV colour space are Hue, Saturation and Value.
Colour is the result of the perception of light at different wavelengths. Usually, we do not experience light at a single wavelength but a blend of waves at different wavelengths. The hue corresponds to the dominant wavelength and determines the type of the colour, for example red, yellow, or blue.
The saturation determines the purity of the colour. High saturation gives
pure colours (narrow wavelength band), while low saturation means
colours mixed with a lot of white (white light combines all the visible
wavelengths).
The value determines the brightness. A value equal to zero represents
absence of light, while a high value gives bright colours.
15.Hue
16.Saturation
17.Value
18.HSV space
19.HSV Color Model
20.HLS Color Model
21.HLS Color Model
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