Figure 6 from Stockman, A. (2004). Colorimetry. In T. G. Brown, K. Creath, H. Kogelnik, M. A. Kriss, J. Schmit & M. J. Weber (Eds.), The Optics Encyclopedia: Basic Foundations and Practical Applications (Vol. 1, pp. 207-226). Berlin: Wiley-VCH.
CMFs, cone fundamentals, and chromaticity coordinates. The upper panel shows the spectrum locus
(continuous line) and selected wavelengths (yellow circles) plotted in the Stiles & Burch (1955)
2-deg r,g chromaticity space, and the projection of the 2-deg L- (red diamond), M- (green
circle) and S- (blue square) cone fundamentals of Stockman & Sharpe (2000). The lower left panel shows the spectrum
locus (continuous line) and selected wavelengths (filled circles) plotted in the Stiles &
Burch (1955) 2-deg RGB space, and the L- (red line), M- (green line) and S- (blue line) cone
vectors. The lower right panel shows a version of CMF space with the plane R + G + B = 1 shown in gray. The
projections of selected points on the spectrum locus onto this plane are shown by the yellow
circles, and the projections of the L-, M- and S-cone vectors are shown by the red diamond,
green circle, and blue square, respectively
Stiles, W. S. (1955). Interim report to the Commission Internationale de l'Éclairage Zurich, 1955, on the National Physical Laboratory's investigation of colour-matching (1955) with an appendix by W. S. Stiles & J. M. Burch. Optica Acta, 2, 168-181.
Stockman, A. (2004). Colorimetry. In T. G. Brown, K. Creath, H. Kogelnik, M. A. Kriss, J. Schmit & M. J. Weber (Eds.), The Optics Encyclopedia: Basic Foundations and Practical Applications (Vol. 1, pp. 207-226). Berlin: Wiley-VCH.
Stockman, A., & Sharpe, L. T. (2000). Spectral sensitivities of the middle- and long-wavelength sensitive cones derived from measurements in observers of known genotype. Vision Research, 40, 1711-1737.