Figure 6
From: Coding of shape from shading in area V4 of the macaque monkey
Direction index. Scatter plot of direction indices are plotted as a function of illumination direction for illumination direction selective cells (n = 23). One point corresponds to the index computed for one illumination direction selective cell at one illumination direction. Red dots represent the mean direction index for each illumination direction. There is no preference for a given illumination direction (ANOVA, p = 0.586).