New CIE Research Forum! RF-05, convened by Tony Bergen.
Since its beginning, colorimetry and photometry were directly related through the CIE colour matching function Y of the CIE 1931 standard colorimetric system which was set to be identical with the spectral luminous efficiency function for photopic vision, V(lambda).
It is also well known that V(lambda) is not a perfect match to human vision and in particular it underestimates the visual response in the blue region. The physiology-based function, known as the cone-fundamental-based spectral luminous efficiency function, V_F(lambda), is based on the latest research and again relates photometry to modern (i.e. cone-fundamental based) colorimetry.
RF-05 will consider the impact of cone fundamentals on measurement of fundamental quantities.
Curious? Check out more details on theRF-05 webpage: https://bit.ly/3YcCWRh.