Illustration of the parameters for calibration.

<p>Illustration of the parameters for calibration.</p

Illustration of one-step rotation in laser scanning.

<p>Illustration of one-step rotation in laser scanning.</p

3D ear acquisition system: (a) Our developed 3D ear acquisition device, (b) 2D ear images with laser lines on them, and (c) 3D ear points cloud sample

<p>3D ear acquisition system: (a) Our developed 3D ear acquisition device, (b) 2D ear images with laser lines on them, and (c) 3D ear points cloud sample</p

3D ear acquisition system: (a) Our developed 3D ear acquisition device, (b) 2D ear images with laser lines on them, and (c) 3D ear points cloud sample

<p>3D ear acquisition system: (a) Our developed 3D ear acquisition device, (b) 2D ear images with laser lines on them, and (c) 3D ear points cloud sample</p

Performance Comparison with commercial scanner (Vivid 910).

<p>Performance Comparison with commercial scanner (Vivid 910).</p

Components of the 3D ear acqusition system.

<p>Components of the 3D ear acqusition system.</p

Specifications of core components.

<p>Specifications of core components.</p

Four types of laser triangulation imaging models.

<p>(a) laser point, (b) line scanning, (c) multi-lines scanning and (d) laser grid.</p

Three-dimensional ear samples viewed in different angle (each row is collected from one ear).

<p>Three-dimensional ear samples viewed in different angle (each row is collected from one ear).</p

Matching results based on database.

<p>(a) Genuine-Impostor distribution curve, (b) ROC curve.</p