colour.models.rgb.transfer_functions.srgb Module

sRGB Colourspace

Defines sRGB colourspace opto-electrical transfer function (OETF / OECF) and electro-optical transfer function (EOTF / EOCF):

• oetf_sRGB()
• eotf_sRGB()

See also

RGB Colourspaces IPython Notebook

References

[1]	International Electrotechnical Commission. (1999). IEC 61966-2-1:1999 - Multimedia systems and equipment - Colour measurement and management - Part 2-1: Colour management - Default RGB colour space - sRGB, 51. Retrieved from https://webstore.iec.ch/publication/6169

[2]

International Telecommunication Union. (2015). Recommendation ITU-R BT.709-6 - Parameter values for the HDTV standards for production and international programme exchange BT Series Broadcasting service (Vol. 5). Retrieved from https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.709-6-201506-I!!PDF-E.pdf

colour.models.rgb.transfer_functions.srgb.oetf_sRGB(L)

Defines the sRGB colourspace opto-electronic transfer function (OETF / OECF).

Parameters:L (numeric or array_like) – Luminance \(L\) of the image. Returns:Corresponding electrical signal \(V\). Return type:numeric or ndarray

Examples

>>> oetf_sRGB(0.18)  
0.4613561...

colour.models.rgb.transfer_functions.srgb.eotf_sRGB(V)

Defines the sRGB colourspace electro-optical transfer function (EOTF / EOCF).

Parameters:V (numeric or array_like) – Electrical signal \(V\).. Returns:Corresponding luminance \(L\) of the image. Return type:numeric or ndarray

Examples

>>> eotf_sRGB(0.461356129500442)  
0.1...