CIE Division 1 Vision and Colour

Dr Mike PointerNational Physical Laboratory

CIE - D1 Meetings2003 San Diego, USA

2004 Tokyo, Japan

2005 León, Spain

2006 Ottawa, Canada

2007 Beijing, China

ISCC/CIE Expert Symposium

0

1

2

75 years of the CIE Standard Colorimetric Observer

National Research Council, Ottawa, Canada

80 delegates - 20 countries - 27 papers - 5 posters

CIE - D1 - Work

Technical Committees: Colour 13Vision 9

Reporters:Colour 2Vision 8

CIE - D1 - Active TCs - ColourTC1-55 Uniform colour space for industrial colour difference evaluationTC1-56 Improved colour matching functionsTC1-63 Validity of range of CIEDE2000TC1-64 Terminology for vision, colour and appearance

CIE - D1 - Active TCs - Vision TC1-42 Colour appearance in peripheral vision TC1-54 Age-related change in visual responseTC1-58 Visual performance in the mesopic range TC1-60 Contrast sensitivity function

CIE - D1 - Technical ReportsTC1-27 Specification of colour appearance for reflective media and self-luminous display comparison TC1-36 Fundamental chromaticity diagramTC1-44 Practical daylight simulators for colorimetry TC1-57 Standards in colorimetryTC1-62 Colour rendering of LED light sourcesTC1-65 Visual appearance measurement TC1-66 Indoor daylight illuminant

CIE - D1 - Recent PublicationsCIE 166:2005 Cognitive Colour

CIE 167:2005 Recommended practice for tabulating spectral data for use in colour computations

CIE 170-1:2006 Fundamental chromaticity diagram with physiological axes - Part 1

CIE - D1 - New WorkTC 1-69 Colour Rendition of white light sources

Terms of reference: To investigate new methods for assessing the colour rendition properties of white-light sources used for illumination, including solid-state light sources, with a goal of recommending new assessment procedures

Chair: Wendy Davis US

CIE - D1 - New WorkR 1-39 Alternative forms of the CIEDE2000 colour-difference equation

Terms of reference: To investigate alternative formulations of the CIEDE2000 equation and make a recommendation to the Division on any action necessary

Mike Pointer GB

CIEDE2000

212222 /

CHCH

*ab

*ab

HH

*ab

CC

*ab

LL

**

SkHC

SkH

SkC

SkLE

⎥⎥⎦

⎤

⎢⎢⎣

⎡⎟⎟⎠

⎞⎜⎜⎝

⎛+⎟⎟

⎠

⎞⎜⎜⎝

⎛+⎟⎟

⎠

⎞⎜⎜⎝

⎛+⎟⎟

⎠

⎞⎜⎜⎝

⎛=

ΔΔΔΔΔΔ

Lightness difference

Chroma difference

Hue difference

Hue rotation

CIEDE2000a2'

00 ⎟⎟⎠

⎞⎜⎜⎝

⎛ Δ=Δ

LLSkLL

Lightness difference

Chroma difference

Hue difference

2

''

''

00 ⎟⎟⎠

⎞⎜⎜⎝

⎛ Δ=Δ

CLSkCC

2

''

''

00 ⎟⎟⎠

⎞⎜⎜⎝

⎛ Δ=Δ

HLSkHH

CIE - D1 - New WorkR 1-40 Scene dynamic range

Terms of reference: To investigate the concept of scene dynamic range, the appearance of colours brighter than the adapted white, and adaptation to the dynamic range of when viewing, and make recommendations regarding work to be done by CIE

Jack Holm US

CIE - D1 - Next meetingBeijing, China:

July 2007

CIE Division 1 Vision and Colour

ASTM International

Dr Mike PointerNational Physical Laboratory

ASTM CommitteesE12 Color and Appearance

E12.1 TerminologyE12.2 Spectrophotometry and colorimetryE12.3 GeometryE12.4 Color and appearance analysisE12.6 Image based color measurementE12.7 Color order systemsE12.11 Visual methodsE12.12 Measurement of metallic and pearlescent colorsE12.14 Multidimensional characterization of appearance

ASTM CommitteesE12.06 Imaged based color measurement

E 2466-06 Standard Test Method for Colorimetry of Teeth Using Digital Still Camera Technology

ASTM CommitteesE12.12 Measurement of metallic and pearlescent colors

110degrees

75degrees

25degrees

Illumination Specular angle

15degrees

45degrees

ASTM CommitteesE12.12 Measurement of metallic and pearlescent colors45°: 0°x45°: -30° (as 15°)45°: -20° (as 25°)45°: 0° (as 45°)45°: 30° (as 75°)45°: 65° (as 110°)

ASTM International