Light and Colour
Exercise 3 - Colour Theory
Electromagnetic Spectrum
Visible Spectrum
- Approx 400 nm to 700nm
- Peak Sensitivity at about 550nm
Sensitivity to Light
- Rod Cells are not colour sensitive
- Cone cells are colour sensitive
- Cone cell peak sensitivity at 430, 535 and 590 nm
Additive and Subtractive Colour Systems
- Metamerism makes colour reproduction possible using the Additive (RGB) and Subtractive (CMY) Colour Systems
- It is also the source of many of our colour reproduction problems!
Exercise 4 - Colour Theory
LAB Colour Space
L = Lightness Channel
A = Red-Green Channel
B = Yellow-Blue Channel
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