Fundamental chromaticity diagram with physiological axes
conference paper
In 1931 CIE widened the scope of the photometric standard observer with the addition of colorimetric properties based on experimental studies by Wright and by Guild. Both of these studies were in terms of relative intensities, so that their final colour matching functions could only be defined after calibration with the 1924 VSOH function.
25 years later Stiles and Burch determined a purely colorimetric database in a pilot study with ten observers (Stiles and Burch, 1955). The CIE, at its Zürich Session in 1955 did not consider the discrepancies between the CIE 1931 Standard Observer and these 2° pilot data large enough to warrant a change in the standard data for practical colorimetry.
However, vision researchers felt a need for an improved colorimetric observer. To that purpose CIE established, in 1991, a Committee on the choice of a set of colour matching functions and estimates of cone fundamentals for the normal observer, ranging in viewing angle from 1° to 10°.
This paper describes the underlying ideas, the methods, and the results, in terms of colour matching functions, receptor action spectra, absorption spectra for the eye media etc.
25 years later Stiles and Burch determined a purely colorimetric database in a pilot study with ten observers (Stiles and Burch, 1955). The CIE, at its Zürich Session in 1955 did not consider the discrepancies between the CIE 1931 Standard Observer and these 2° pilot data large enough to warrant a change in the standard data for practical colorimetry.
However, vision researchers felt a need for an improved colorimetric observer. To that purpose CIE established, in 1991, a Committee on the choice of a set of colour matching functions and estimates of cone fundamentals for the normal observer, ranging in viewing angle from 1° to 10°.
This paper describes the underlying ideas, the methods, and the results, in terms of colour matching functions, receptor action spectra, absorption spectra for the eye media etc.
TNO Identifier
93747
Source title
CIE SYMPOSIUM'99 - 1