Material and shape perception based on two types of intensity gradient information
Fig 13
Stimuli used in Experiment 2b.
We applied a variety of monotonic and nonmonotonic remappings to the object images under the lighting conditions of slant 0° (left) and slant 45° (right). When the slope of the remapping was steep (i.e., slope = 2), the intensity order of the original image was not disrupted by the amplitude modulation (0.165) as in Experiment 2. In contrast, when the slope was gentle (i.e., slope = 0.5), the intensity order was disrupted by the modulation. Object 4 was used in the experiment. The six gauge probes as shown in the gauge position figures were used.