Effects of adapting luminance and CCT on appearance of white and degree of chromatic adaptation, part II: extremely high adapting luminance

In part I of this work [ Opt. Express , 27 9276 (2019) 10.1364/OE.27.009276 ], we carried out an experiment to investigate the effects adapting luminance and correlated color temperature (CCT) on degree chromatic adaptation. Under highest white L w 900 cd/m 2 incomplete adaptation was still found under 2700 3500 K conditions. This motivated us further increase whether a complete cannot happen low CCT (e.g., K). experiment, investigated degrees 12 conditions, comprising four (i.e., 2700, 3200, 4000, 6500 K) three levels 1200, 2100, 3000 ), by asking human observers adjust appearance stimulus whitest. Such conditions were never in past are assumed introduce The results clearly show that happened condition having or 3200 K, though so high. jointly affect adaptation, with higher level. When K), be able more effectively. These findings suggest necessity revise transforms (CAT) models (CAM) for better characterizing different