Figure 3
From: Influence of Spatial and Chromatic Noise on Luminance Discrimination

Comparison of the luminance contrast thresholds obtained using mosaic (gray bars) and non-mosaic (white bar) stimuli (A). The thresholds estimated using mosaic stimulus were significantly higher than those estimated using non mosaic stimulus for all subjects at all conditions. (B) Normal frequency distribution of the log10 ratio between the thresholds estimated using mosaic stimulus and non-mosaic stimulus. The median of the distribution was 1.18 log units. Error bars represents the standard deviation (n = 40). Error bars represent the standard deviation of the mean.