Fig. 5
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The stimuli. (a) A PVC strip with smooth surface. It is the prototype shape in Experiment 1 and one of the real reference stimuli in Experiment 2. (b) A PVC strip with textured surface. It is the prototype shape in Experiment 1. (c) A texture model (Gratings are single sided copper on printed circuit boards). It is the prototype shape in Experiment 1 and one of the real reference stimuli in Experiment 2.
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