Figure 2.

Effect of scanning speed on RMS displacement and acceleration. (a) Example displacement traces for four textures scanned at three speeds. (b) RMS displacement for each texture between 40 and 160 mm s⁻¹. Speeds below 40 mm s⁻¹ are discarded owing to noise (see Methods). (c) Example acceleration traces for four textures scanned at three speeds. (d) RMS acceleration for each texture across all speeds. Lines and shaded areas for (b,c) represent mean and standard error, respectively. Color scheme follows that of figure 1.