Download - Colour Theory and Application
![Page 1: Colour Theory and Application](https://reader036.vdocuments.site/reader036/viewer/2022062301/56813fec550346895daaedac/html5/thumbnails/1.jpg)
Colour Theory and Application
B.Sc. (Hons) Multimedia Computing
Media Technologies
![Page 2: Colour Theory and Application](https://reader036.vdocuments.site/reader036/viewer/2022062301/56813fec550346895daaedac/html5/thumbnails/2.jpg)
Describing Colour
• Words we might use when naming and describing colours:
• ‘shade, hue, warm, tone, bright, dim, pale, intense, vivid, rich, saturated, cold, strong, wishy-washy, glowing, colour, flat, weak, muddy, soft, vibrant, luminance, bold, tint’
• Very subjective - influenced by perception and characteristics of illuminating light source.
B.Sc. (Hons) Multimedia Computing
Media Technologies
![Page 3: Colour Theory and Application](https://reader036.vdocuments.site/reader036/viewer/2022062301/56813fec550346895daaedac/html5/thumbnails/3.jpg)
Colour Temperature
![Page 4: Colour Theory and Application](https://reader036.vdocuments.site/reader036/viewer/2022062301/56813fec550346895daaedac/html5/thumbnails/4.jpg)
The Colour Wheel
![Page 5: Colour Theory and Application](https://reader036.vdocuments.site/reader036/viewer/2022062301/56813fec550346895daaedac/html5/thumbnails/5.jpg)
Hue, Saturation, Value (HSV)
The HSV model is based on the following concepts
• Hue - this is what most people would refer to as the colour or shade. Red, yellow, green and blue are hues.
• Saturation - this is a value that represents where the colour is on a scale from achromatic white to the pure hue.
• Value - is the attribute, sometimes referred to as brightness, which determines how intense the colour is on a a scale from black to the pure hue.
![Page 6: Colour Theory and Application](https://reader036.vdocuments.site/reader036/viewer/2022062301/56813fec550346895daaedac/html5/thumbnails/6.jpg)
Colour Models
• Additive Synthesis - Start with no light. Add red green and blue light to make white and complementary colours
• Subtractive Synthesis start with white light. Subtract red green and blue light to achieve complementary colours and black
B.Sc. (Hons) Multimedia Computing
Media Technologies
![Page 7: Colour Theory and Application](https://reader036.vdocuments.site/reader036/viewer/2022062301/56813fec550346895daaedac/html5/thumbnails/7.jpg)
B.Sc. (Hons) Multimedia Computing
Media Technologies
Additive Synthesis
![Page 8: Colour Theory and Application](https://reader036.vdocuments.site/reader036/viewer/2022062301/56813fec550346895daaedac/html5/thumbnails/8.jpg)
Colour Models:RGB
• Display devices generally use a color model called RGB.
• Stands for Red-Green-Blue• Based on the additive synthesis model• RBG colour value specified in three bytes
B.Sc. (Hons) Multimedia Computing
Media Technologies
![Page 9: Colour Theory and Application](https://reader036.vdocuments.site/reader036/viewer/2022062301/56813fec550346895daaedac/html5/thumbnails/9.jpg)
Subtractive Synthesis
B.Sc. (Hons) Multimedia Computing
Media Technologies
![Page 10: Colour Theory and Application](https://reader036.vdocuments.site/reader036/viewer/2022062301/56813fec550346895daaedac/html5/thumbnails/10.jpg)
B.Sc. (Hons) Multimedia Computing
Media Technologies
Subtractive Synthesis
![Page 11: Colour Theory and Application](https://reader036.vdocuments.site/reader036/viewer/2022062301/56813fec550346895daaedac/html5/thumbnails/11.jpg)
Colour Models:CMYK
• Cyan-Magenta-Yellow-Black, and pronounced as separate letters. CMYK
• Based on the subtractive synthesis model• CMYK is a colour model in which all colors are
described as a mixture of these four process colours.
• CMYK is the standard colour model used in offset printing for full-colour documents. Because such printing uses inks of these four basic colours, it is often called four-colour printing.
B.Sc. (Hons) Multimedia Computing
Media Technologies
![Page 12: Colour Theory and Application](https://reader036.vdocuments.site/reader036/viewer/2022062301/56813fec550346895daaedac/html5/thumbnails/12.jpg)
CMYK Subtractive
B.Sc. (Hons) Multimedia Computing
Media Technologies
Subtractive color: Illuminate objects that contain dyes or pigments that remove portions of the visible spectrum.The objects may either transmit light (transparencies) or reflect light (paper, for example).The subtractive primaries are C, M and Y. Cyan absorbs red; hence C is sometimes called "minus red" (-R). Similarly, M is -G and Y is -B.
![Page 13: Colour Theory and Application](https://reader036.vdocuments.site/reader036/viewer/2022062301/56813fec550346895daaedac/html5/thumbnails/13.jpg)
Colour Models: RGB & CMYK
B.Sc. (Hons) Multimedia Computing
Media Technologies
![Page 14: Colour Theory and Application](https://reader036.vdocuments.site/reader036/viewer/2022062301/56813fec550346895daaedac/html5/thumbnails/14.jpg)
B.Sc. (Hons) Multimedia Computing
Media Technologies