Material and shape perception based on two types of intensity gradient information
Fig 18
Stimuli and results of the additional experiment of Experiment 3.
(a) The same stimulus set as Experiment 3 under a different lighting condition (illumination slant = 45) is used in the experiment. The directional distortion of intensity gradients from the Lambertian object image is shown in the bottom of each stimulus on the red-green axis. (b) The angular difference between the judgments on the two asperity conditions and the Lambertian condition. The horizontal axis indicates the gauge number.