As the GIMP 2.10 release edges closer, I thought GIMP devs and GIMP
users might want to look at the following article:
Of 29 compared RGB working spaces, sRGB came in second-worst in a
comparison of performance against spectral reference. AdobeRGB1998
ranked 15th from the top, ProPhotoRGB 17th from the top.
BetaRGB came in at the very top. Of the larger gamut color spaces,
Rec.2020 and two ACES variants were in the top ten.
Quoting the introduction to the article:
"The purpose of this document is to compare RGB colourspace models
operations performance against spectral reference."
"Various mathematical operations because of the nature of matrices and
linear algebra are dependent on given RGB colourspace primaries. The
same operations performed in different RGB colourspaces will yield
different tristimulus values once converted back to CIE XYZ colourspace.
For example multiplication, division and power operations are RGB
colourspace primaries dependent while addition and subtraction are not."
Quoting the conclusion: "We won't provide any conclusions because the
results in the given tests context are self explanatory."
The study suggests that sRGB is just about the worst possible color
space you could use for image editing.
Color management and free/libre photography
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