0.20.40.60.810.30.40.50.60.70.80.91Sanders & Wyszecki (1963) | R² : 0.772403Wyszecki (1967) | R² : -2.697207Fairchild & Pirotta (1990) | R² : 0.784880Withouck & al. (2013) | R² : 0.636615identityModel Brightness vs. Experimental brightnessdt UCS brightnessExperimental brightnessR² : 0.923379