opRGB

Responsible Organization: International Standard defining this colour encoding published by IEC, Geneva (document available through National Standards Bodies). Characterization data derived from this was defined by ICC.

Contact Information:
ICC Technical Secretary
email: [email protected]

DOCUMENTATION

Documentation source IEC 61966-2-5:2007

ENCODING CHARACTERISTICS

Color space

Type: Colorimetric RGB color space

Color gamut: Extended

RGB primaries:

	x	y	z
R	0.64	0.33	0.03
G	0.21	0.71	0.08
B	0.15	0.06	0.79

Color component transfer function: 2.2 gamma

White point luminance: 160 cd/m²

White point chromaticity: x = 0.3127, y = 0.3290 (D65)

Encoding Range: linear RGB: 0.0 - 1.0

Bit depth: 8 (others allowed)

Image state: Output-referred

Reference viewing environment

Image background (proximal field): 32 cd/m²

Viewing surround: 4.07 cd/m2

Ambient illuminance: 64 lux

Ambient white point chromaticity: x = 0.3457, y = 0.3585 (D50)

Adapted white point luminance: Unspecified (assumed equal to reference medium white point luminance)

Adapted white point chromaticity: Unspecified (assumed equal to reference medium white point chromaticity)

Reference medium

White point luminance: 160 cd/m²

White point chromaticity: x = 0.3127, y = 0.3290 (D65)

Black point luminance: 0.4 cd/m²

Black point chromaticity: x = 0.3127, y = 0.3290 (D65)

HINTS FOR PROFILE MAKERS

ICC extensions: Equations defining transform to ICC PCS in oprgb.pdf

Also see Transforming via the ICC PCS for details on the derivation and use of D50 adapted data, chromatic adaptation matrix and measurement corrections.