Optimal colors can predict luminosity thresholds in natural scenes
Fig 2
Results from Experiments 1, 2, and 3.
A: Experiment 1 results: mean observers’ settings (N = 8), averaged across all backgrounds, for the 6500 K condition (left) and the 3000 K condition (right). Optimal colors are shown for comparison, and the correlation between the two loci is reported. The filled gray areas represent the 95% confidence intervals of the observers’ settings. B: Experiment 2 results: same format as panel A. The left part shows the averaged results for the 6500 K condition; in addition, the right part shows individual observer results, clustered by judgment strategy. C: Experiment 3 results: same format as panel A. The averaged results are presented for the 6500 K condition. D: results of the three experiments, averaged across observers and backgrounds, plotted together. For Experiment 1, only the 6500 K condition is shown. Asterisks indicate significant differences between the loci: * p and ** p
. The notation n.s. denotes no statistically significant difference. See Analysis section for statistical details.