Foreword

Introduction

1Scope

2Normative references

3Terms and definitions

4Image-state-based digital imaging architecture

4.1General

4.2Scene-referred colour encodings

4.3Picture-referred colour encodings

4.3.1General

4.3.2Original-referred colour encodings

4.3.3Output-referred colour encodings

4.4Colour-rendering transforms

4.5Colour re-rendering transforms

4.6Film rendering and unrendering transforms

5Requirements for specifying a colour encoding

5.1Colour encoding hierarchy

5.2Information needed to define a colour space

5.2.1General

5.2.2Colourimetric colour spaces

5.2.2.1General

5.2.2.2CIE colour spaces

5.2.2.2.1CIE colour space specification

5.2.2.2.2Colour space white point

5.2.2.3Additive RGB colour spaces

5.2.2.3.1General

5.2.2.3.2RGB primaries chromaticity values

5.2.2.3.3Colour space white point

5.2.2.3.4Colour component transfer function

5.2.2.4Luma-chroma colour spaces derived from additive RGB colour spaces

5.2.2.4.1General

5.2.2.4.2Additive RGB colour space

5.2.2.4.3Luma-chroma matrix

5.2.2.5Other colourimetric colour spaces

5.2.3Colour appearance colour spaces

5.2.4Device-dependent colour spaces

5.2.4.1General

5.2.4.2Input-device-dependent colour spaces

5.2.4.2.1General

5.2.4.2.2Spectral sensitivity

5.2.4.2.3Colour component transfer function

5.2.4.2.4Colour space white point

5.2.4.3Output-device-dependent colour spaces

5.3Information needed to define a colour space encoding

5.3.1General

5.3.2Colour space

5.3.3Digital encoding method

5.3.3.1General

5.3.3.2Integer digital encoding

5.3.3.2.1General

5.3.3.2.2Colour space value range

5.3.3.2.3Digital code value range

5.3.3.3Floating-point digital encoding

5.3.4Set of valid colour values

5.4Information needed to define a colour image encoding

5.4.1General

5.4.2Colour space encoding

5.4.3Image state

5.4.4Reference image viewing environment

5.4.4.1General

5.4.4.2Image surround

5.4.4.3Assumed adapted white point

5.4.4.4Luminance of adapting field

5.4.4.5Viewing flare

5.4.5Set of valid colour values

5.4.6Reference imaging medium

5.4.6.1General

5.4.6.2Reference imaging medium white point

5.4.6.3Reference imaging medium black point

5.4.6.4Rendering target colour gamut

Annex AExample system workflows (informative)

A.1General

A.2Generic workflow for digital photography

A.3Generic workflow for digital camera producing display-ready images

A.4Generic workflow for copy-stand photography

A.5Generic workflow for scanning hardcopy

A.6Generic workflow for hardcopy scanners producing display-ready images

A.7Generic workflow for scanning colour negatives

A.8Generic workflow for video imaging systems

Annex BCharacteristics of existing colour encodings (informative)

Annex CCriteria for selection of colour encoding (informative)

C.1General

C.2Image state

C.3Extent of colour gamut

C.4Luminance dynamic range

C.5Headroom for brighter-than-white highlights

C.6Quantization error

C.7Quantization efficiency

C.8Perceptual isometry

C.9Complexity of conversions to other important colour encodings

C.10Compressibility

C.11Compatibility with existing industry practice

C.12Hue shifts induced by nonlinear tone scale manipulations

Bibliography