Vincent Lévesque

Experimental Results

Surface with a Bump

In this experiment, a fingertip is moving from left to right over a bump located approximately in the region bordered by green dotted lines in Figure 1(b). Figures 2 and 3 show a clear pattern of compression on the left of the bump and stretch on the right of the bump.

(a) Illustration (not to scale).

(b) Fingerprint with approximate position of bump.

Figure 1. Finger sliding over surface with a bump.

(a) Interval of 1 frame.

(b) Interval of 11 frames.

Figure 2. Measurements obtained from the relative variations in edge length.

(a) Interval of 1 frame.

(b) Interval of 11 frames.

Figure 3. Measurements obtained from the relative variations in area.