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colour-science
@colour-science.bsky.social
Colour Science for Python
Transformers One!
August 21, 2025 at 7:06 AM
What I tend to do is to use the sRGB matrix for any IO with “outside” data because most people use the matrices directly and for any “internal” processing, I use the derived matrices from ITU-R BT.709.
March 14, 2025 at 7:34 PM
Hello,

The reason is because sRGB (IEC 61966-2-1:1999) defines the transformation from CIE XYZ to sRGB using a matrix with 4 decimals where ITU-R BT.709 only specifies the primaries and whitepoint which allows derivation of transformation matrices at machine, e.g., double precision.
March 14, 2025 at 7:32 PM