> Problem is, it has no colorimetric or perceptual interpretation.
but do we need such interpretation at all ? if one is trying to exclude the color transform influence ("camera profiles") from comparison then one actually does not want that interpretation at all and can assume that the data before color transform shall be sufficiently close in that RGB DNs "space" for cameras that are not designed to have different CFAs (or different CFA but resulting in somewhat same total light under a specific illumination transmitted to "R", "G1/G2", "B" sensels in the same spot for different cameras - but then in this case under a different spectrum we shall see more different results - which btw means that your example might gain from comparison under 2 different spectrums... pity that test sites don't publish same raws same scene shot under some tungsten for example, no ?)
> Problem is, it has no
> Problem is, it has no colorimetric or perceptual interpretation.
but do we need such interpretation at all ? if one is trying to exclude the color transform influence ("camera profiles") from comparison then one actually does not want that interpretation at all and can assume that the data before color transform shall be sufficiently close in that RGB DNs "space" for cameras that are not designed to have different CFAs (or different CFA but resulting in somewhat same total light under a specific illumination transmitted to "R", "G1/G2", "B" sensels in the same spot for different cameras - but then in this case under a different spectrum we shall see more different results - which btw means that your example might gain from comparison under 2 different spectrums... pity that test sites don't publish same raws same scene shot under some tungsten for example, no ?)