PHYSIOLOGICALLY-BASED COLOUR MATCHING FUNCTIONS

摘要

Since the establishment of the trichromatictheory of colour perception [e.g., 6-8], a central goal of vision science has been the accurate determination of the spectral sensitivities of the long-, middle- and short-wavelength-sensitive (L, M and S) cones, l(lambda), m(lambda) and s(lambda), the physiological bases of trichromacy. These are also known as the fundamental colour matching functions (CMFs). Like most previous estimates, the cone fundamentals of Stockman and Sharpe [1], which are to be recommended by the CIE Technical Committee 1-36 as an international standard for colorimetry, rely on measurements made in both normal trichromats and colour deficient blind observers. The Stockman and Sharpe l(lambda) and m(lambda) cone fundamentals were initially derived from measurements made in deuteranopes and protanopes (dichromats who lack the M- and L-cones, respectively) of known genotype [3]. Their s(lambda) cone fundamental was initially derived [11] both from: (i) spectral sensitivity measurements made in S-cone monochromats, who lack functioning M- and L-cones, and in normal trichromats under intense long-wavelength adaptation; and (ii) a direct analysis of the 10-deg CMF data of Stiles & Burch [5]. The final cone fundamental estimates are linear transformations of the 10-deg CMF data guided mainly by the cone spectral sensitivity data and proposed for 2- or 10- deg viewing conditions.