Light and Colour

- Electromagnetic Spectrum
- Visible Spectrum

- Eye:

• Rod cells are not colour sensitive
• cone cells are colour sensitive
• cone cells peak sensitivities @ 430,535 and 590Nm

- Metamerism:
Pairs of different light spectra that are perceived as the same colour by the brain.

- Additive (RGB)
- Subtractive (CMY)
- Lab colour space


Digital Raw

- All digital cameras capture RAW data