IntroductionSome Colour Definitions and Explanations.What is the correct way to describe colour?What is a colour space?Why is there more than one colour space?What's the difference between device dependent and device independent?What is a colour gamut?What is the CIE System?What colour space should I use?RGB (Red Green Blue)CMY(K) (Cyan Magenta Yellow (Black))HSL (Hue Saturation and Lightness)YIQ, YUV, YCbCr, YCC (Luminance - Chrominance)CIEGamma and linearity.Grassman's Laws of additive colour mixture.Tristimuli, Chromaticity, and Colorimetric systems.CIE XYZ (1931)CIE YUV (1960)CIE YU'V'CIE L*u*v*CIE L*a*b*Colour Difference.Computer Graphics Colour Spaces.Computer RGB colour space.CMY(K) (Cyan Magenta Yellow (Black))HSL (Hue Saturation Lightness).Hue Saturation Value (Travis).Hue Saturation and Intensity. (Gonzalez and Woods).TV and allied non-linear systems European Y'U'V' (EBU)American Y'I'Q'SMPTE-C RGBITU.BT-601 Y'CbCrITU.BT-709 HDTV studio production in Y'CbCrSMPTE-240M Y'PbPrKodak PhotoYCC Colour Space.Colour appearence.The Colour Reproduction Index.Some references and bedtime reading.On--line references.Real Paper References.General Colour Theory.RGB to CIE conversion.Colour in TV and Computer Graphics.Colour and printing. Gamma and transfer functions.Colour in Digital Image Processing and Computer Graphics.Other Colour Related.Footnotes & Disclaimer.Colour Space Conversions.Adrian Ford ([email protected])and Alan Roberts ([email protected]).August 11, 1998Contents1 Introduction 32 Some Colour Definitions and Explanations. 32.1 What is the correct way to describe colour? . . . . . . . . . . . . . . . . . . .32.2 What is a colour space? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42.3 Why is there more than one colour space? . . . . . . . . . . . . . . . . . . . . 42.4 What’s the difference between device dependent and device independent? . . . 52.5 What is a colour gamut? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52.6 What is the CIE System? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52.7 What colour space should I use? . . . . . . . . . . . . . . . . . . . . . . . . . 62.7.1 RGB (Red Green Blue) . . . . . . . . . . . . . . . . . . . . . . . . . . 62.7.2 CMY(K) (Cyan Magenta Yellow (Black)) . . . . . . . . . . . . . . . . 62.7.3 HSL (Hue Saturation and Lightness) . . . . . . . . . . . . . . . . . . . 62.7.4 YIQ, YUV, YCbCr, YCC (Luminance - Chrominance) . . . . . . . . . 62.7.5 CIE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Gamma and linearity. 74 Grassman’s Laws of additive colour mixture. 85 Tristimuli, Chromaticity,and Colorimetric systems. 95.1 CIE XYZ (1931) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95.2 CIE YUV (1960) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95.3 CIE YU’V’ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105.4 CIE L*u*v* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105.5 CIE L*a*b* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105.6 Colour Difference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 Computer Graphics Colour Spaces. 117 Computer RGB colour space. 1218 CMY(K) (Cyan Magenta Yellow (Black)) 149 HSL (Hue Saturation Lightness). 159.1 Hue Saturation Value (Travis). . . . . . . . . . . . . . . . . . . . . . . . . . . 159.2 Hue Saturation and Intensity. (Gonzalez and Woods). . . . . . . . . . . . . . . 1710 TV and allied non-linear systems 1810.1 European Y’U’V’ (EBU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1810.2 American Y’I’Q’ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2010.3 SMPTE-C RGB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2210.4 ITU.BT-601 Y’CbCr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2310.5 ITU.BT-709 HDTV studio production in Y’CbCr . . . . . . . . . . . . . . . . 2410.6 SMPTE-240M Y’PbPr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2511 Kodak PhotoYCC Colour Space. 2612 Colour appearence. 2813 The Colour Reproduction Index. 2814 Some references and bedtime reading. 2914.1 On–line references. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2914.2 Real Paper References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2914.2.1 General Colour Theory. . . . . . . . . . . . . . . . . . . . . . . . . . 2914.2.2 RGB to CIE conversion. . . . . . . . . . . . . . . . . . . . . . . . . . 2914.2.3 Colour in TV and Computer Graphics. . . . . . . . . . . . . . . …