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Artificial Intelligence and Soft Computing: Behavioral ... - Arteimi.info

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Thus we have altogether 6 different fingerprints (fig. 24.5(a)), which can be<br />

classified by using the classification tree presented in fig. 24.5 (b).<br />

Core/ delta<br />

Pair = 0<br />

Fingerprints<br />

Core/ delta<br />

Pair = 1<br />

Class = Arch Class =<br />

tented Arch<br />

or Loop<br />

Criterion 1 Criterion 2<br />

Class =<br />

Tented<br />

Arch<br />

Delta in the left of<br />

the core<br />

Class =<br />

Left Loop<br />

Class =<br />

Loop<br />

Core/ delta<br />

Pair = 2<br />

Class =<br />

Whorl<br />

Delta in the right of the<br />

core<br />

Class =<br />

Right Loop<br />

Criterion 1: Line joining the core <strong>and</strong> the delta is in the local direction, Criterion 2: Line joining<br />

the core <strong>and</strong> the delta crosses the local direction, Criterion 3:Line joining the core points is along<br />

the local direction, Criterion 4: Line joining the core points crosses the local direction vector.<br />

Leaves, denoted by dark shaded nodes, are the final classes.<br />

Class = Whorl<br />

or Twin Loop<br />

Criterion 3<br />

Fig. 23.5(b): The fingerprint classification tree used in the simulation.<br />

Criterion 4<br />

Class =<br />

Twin<br />

Loop

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