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

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Procedure find-fingerprint-class;<br />

Begin<br />

1 While number of core plus delta points exceed 2, use Gaussian<br />

smoothing<br />

End While;<br />

2 If number of core-delta pair = 0<br />

Then class = arch;<br />

Else If number of core-delta pair = 1<br />

Then class = tented arch or loop;<br />

Else class = whorl or twin loop;<br />

3 If number of core-delta pair = 1<br />

Then If the line joining the core <strong>and</strong> delta point intersects<br />

the line of local direction transversely<br />

Then class = loop;<br />

Else class = tented arch;<br />

4 If number of core-delta pair =2<br />

Then If the straight line joining the core points do not<br />

touch the local direction<br />

Then class = whorl<br />

Else class = twin loop;<br />

5 For class ∈ loop;<br />

If core is left to delta<br />

Then class = left loop;<br />

Else class = right loop.<br />

End For;<br />

End.<br />

After the fingerprint is classified into one out of the above six possible<br />

classes, it is searched among the set of fingerprint databases under the<br />

identified class. If a suitable match is found by the image matching algorithm,<br />

discussed in section 23.2.3, then the suspect could be detected; otherwise the<br />

scheme for facial image matching is called for.<br />

23.4 Identification of the Suspects from Voice<br />

During phonation of the voiced speech, the vocal tract is excited by the<br />

periodic glottal waveform generated by the vocal cords. The periodicity of<br />

this waveform is called pitch period, which depends upon the vocal tract<br />

shape that varies with the speakers. The shape of the vocal tract uniquely<br />

determines the sounds that are produced <strong>and</strong> characterized by natural<br />

frequencies (or formants) which correspond to the resonant frequencies of the<br />

acoustic cavity [17]. Since formants depend upon the longitudinal

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