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COLOUR ORDER SYSTEMS and COLOUR ATLASSES

COLOUR ORDER SYSTEMS and COLOUR ATLASSES. Early colour order systems.

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COLOUR ORDER SYSTEMS and COLOUR ATLASSES

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  1. COLOUR ORDER SYSTEMS and COLOUR ATLASSES

  2. Early colour order systems • Sigfrid Aronus Forsius(1611) was probably the first to device a three-dimensional model of colour space in the form of a sphere, where he systematically organized colour samples with white and black at the poles and yellow and blue, red and green at opposite points on the equator.

  3. Early colour order systems • Tobias Mayer (1758)

  4. Early colour order systems • Moses Harris (1766)

  5. Early colour order systems • Otto Runge: colour sphere(1810)

  6. Early colour order systems - 5 • Goethe’s colour circle, 1810

  7. Early colour order systems - 5 • E Hering: Das natürliche System der Farb-empfindungen, 1874

  8. Munsell colour system - 1 • Colour notation system, 1905 • Atlas of the Munsell Colour System, 1915 • Perceptual quantities: • hue • chroma (describing satuartion) • Munsell value (describing lightness)

  9. Munsell colour system - 2 • Schematic view of the Munsell system

  10. Munsell tree of colours

  11. Munsell colour system - 3 • Munsell colour circle and hue description

  12. Munsell atlaspages • Leaves of the Munsell colour tree • Munsell - CIE conversion programme: see c:\program Files \Cmc\CMC.exe

  13. Structure of the Munsell colour system page • Organisation of the colours of constant Munsell hue • Munsell value - CIE lightness conversion, non convertable:

  14. Natural colour system -1 • Hering colour theory • six elementary colours: • two achromatic: white - black • four chromatic:yellow, red, blue, green • yellow - blue • red - green antagonistic colours

  15. Natural colour system -2, the NCS space

  16. Natural colour system -3 • The hue circle of the NCS system • Opponent hues and hue descriptors

  17. Natural colour system -4, and NCS atlas • NCS constant hue triangle • c = chromaticness • s = blackness • S SSCC: blackness chromaticness,e.g.: S 5010 - Y70R • No simple conversion between NCS notation and CIE tristimulus values

  18. A page of the NCS atlas S 4030 - Y80R

  19. Further colour order systems • OSA - UCS system • samples on a cuboctahedron lattice • lightness and two opponent axes • DIN system (derived from Oswald system) • hue, saturation,darkness degree • Coloroid colour system • based on colour harmony

  20. Coloroid colour system • Hue notation in Coloroid:A = 10 … 76 • Saturation: T • Value: V

  21. The Coloroid colour space

  22. Coloroid colour system - 1 • ColoroidA-T-Vnotation

  23. Coloroid colour system - 2 • Coloroid hue circle

  24. A page fro the Coloroid atlas A = 23

  25. Coloroid colour system - 3 • Two leaves of the Coloroid atlas

  26. CIELAB colour space • L*=116(Y/Yn)-16 • a*=500{(X/Xn)1/3- (Y/Yn)1/3} • b*=200{(Y/Yn)1/3- (Z/Zn)1/3}

  27. CIELAB colour solid

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