… Various features have been extracted with ultrasound methods, the most popular being
fingerprint [28], [29], for which micromachined sensors were recently realized and integrated into …

… Ultrasonic fingerprint sensors are nowadays integrated in … to be described as a three-dimensional
matrix (416 × 500 × 68 … The proposed biometric recognition method is based on the …

… based on palm curvature [25], using similar methods as those … Three-dimensional ultrasonic
images of the whole hand were acquired with a similar technique as that used for palmprint […

… ultrasound acquisition system was set up [47], and a palmprint recognition procedure based
on curvature … Blake, and DB Downey, “Three-dimensional ultrasound imaging system for …

… recognition systems very hard to fake. In this work, a feasible palmprint recognition system
based on 3D ultrasound … other 3-D palmprint features through curvature methods [34] as well …

… to the kind of ultrasound technique exploited for acquiring the … Similarly, three-dimensional
ultrasound images can be … extraction procedures based on both palm curvature [92] and line …

… Palmprint recognition based on 3D ultrasound has been … through curvature analysis methods
[26] (which have been widely investigated for images acquired with optic techniques [2,27])…

… methods, but these approaches require too long of an acquisition time. In this work, a … , which
is a relatively small subset of a larger database established for palmprint recognition in [29]. …

… In recent years, three-dimensional (3D) palmprint biometrics has attracted much attention due
… Caliano, An enhanced ultrasound technique for 3D palmprint recognition, in Proceeding of …

… a 3-D palmprint into a curvature-based gray-level palmprint … reconstruction, laser scanning,
and ultrasound techniques [35], [… Flynn, “Three-dimensional facial imaging using a static light …