Feature Extraction and Image Processing for Computer Vision, 4th Edition

11.3. Perception-based colour models: CIE RGB and CIE XYZ

Colours models define colour according to the colourimetric equation. The CIE RGB and CIE XYZ colour models were defined in 1931 by the Commission Internationale de L'Eclairage (CIE). Both models provide a description of the colours according to human perception and they characterise the same colour's properties, nevertheless they use different base colours. Whilst the CIE RGB uses visible physical colours, the XYZ uses imaginary or inexistent colours that only provide a theoretical basis. That is, the CIE RGB is the physical model developed based on perception experiments, whilst the CIE XYZ is theoretically derived from the CIE RGB. The motivation to develop the CIE XYZ is to have ...