Experimental Results
Lateral Movement
In this example a finger pressed against a flat surface moves back and forth horizontally. A patch of skin is sticking to the glass while the surrounding skin moves with the finger. Notice the patterns of compression and expansion around the stationary patch of skin.
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(a) Illustration (not to scale). |
(b) Fingerprint. |
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Figure 1. Finger sliding over a flat surface. |
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(a) Relative variations in edge length. |
(b) Relative variations in area. |
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Figure 2. Measurements obtained over an interval of 1 frame. |
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