Specifications of core components.

<p>Specifications of core components.</p

Performance Comparison with commercial scanner (Vivid 910).

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

Illustration of the parameters for calibration.

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

Illustration of parameters variation with different subdivision numbers.

<p>Illustration of parameters variation with different subdivision numbers.</p

Components of the 3D ear acqusition system.

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

Matching results based on database.

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

Architecture of the developed 3-D ear data acquisition device.

<p>(1) CCD camera, (2) camera lens, (3) laser projector, (4) step motor, (5) photoelectric encoder, (6) motion controller, (7) signal and power control box, and (8) device shell.</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

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

Illustration of one-step rotation in laser scanning.

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