Fig. 1
From: Perceptual space and adjective rating of 2.5D tactile patterns
2.5D tactile pattern designs for the experiment. (a) Twenty five 2.5D tactile patterns for the experiments. On each square cell of a sample were located multiple dome shapes, i.e., bumps. For each pattern, samples with bumps having fixed diameter values (d  =  1.4 and 5.6 mm) were fabricated. Three colors (black, gray, and white) mean the height difference in the dome height. (b) Size comparison of samples with d  =  1.4 and 5.6 mm (c) Top and side views of a 2.5D pattern sample. Each pattern is embedded on a flat square plate with a side length of 25 mm.
