Some examples of fingerprint images in our database.

<p>(a) are fingerprint images of four fingers of the first twin, and (b) are the fingerprint images of the corresponding four fingers of his/her identical twin. (c) and (d) show fingerprint images from a non-identical twin pair.</p

The relationship between FAR and matching threshold.

<p>The relationship between FAR and matching threshold.</p

ROC curves for identical-twin and non-twin matchings by P071 method.

<p>ROC curves for identical-twin and non-twin matchings by P071 method.</p

The fraction of the same fingerprint type between the corresponding fingers of identical twins.

<p>The fraction of the same fingerprint type between the corresponding fingers of identical twins.</p

An example of fingerprint enhancement and minutiae extraction by P071 method.

<p>(a) Original fingerprint; (b) Enhancement results of (a); (c) Minutiae extraction results of (a).</p

The comparing results summary of Jain, Han, Srihari, Sun and our methods.

<p>The comparing results summary of Jain, Han, Srihari, Sun and our methods.</p

Score distributions for genuine, identical-twin imposter and non-twin imposter by P071 method.

<p>Score distributions for genuine, identical-twin imposter and non-twin imposter by P071 method.</p

Score distributions.

<p>Score distributions for (a) genuine, (b) identical-twin imposter and (c) non-twin imposter via VeriFinger 6.1 SDK.</p

An example of fingerprint enhancement and minutiae extraction with user interface of VeriFinger 6.1.

<p>An example of fingerprint enhancement and minutiae extraction with user interface of VeriFinger 6.1.</p

The probability distribution of five major fingerprint types/classes for all the fingers in our database.

<p>The probability distribution of five major fingerprint types/classes for all the fingers in our database.</p