Length and Roughness Perception in a Moving-Plateau Touch Display

Table 2

Theoretically expected roughness 𝑅_𝑒 (mm-d) and its ratio 𝑋 to the original roughness (0.40 and 0.60 mm-d) according to velocity ratio 𝛼

Velocity ratio α	−0.67	−0.25	0.00	0.20	0.50
Expected roughness 𝑅𝑒 (mm-d) for 0.40 mm-d	0.24	0.32	0.40	0.50	0.80
Expected roughness 𝑅𝑒 (mm-d) for 0.60 mm-d	0.36	0.48	0.60	0.75	1.20
Ratio to original 𝑋	0.60	0.80	1.00	1.25	2.00