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

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identified. Fuzzy gain of all these three paths is then found to be 0.6.<br />

Thus the following conclusion <strong>and</strong> explanation is reported to the users.<br />

Conclusion: Lata is the criminal.<br />

Explanation: Ram loved Lata. Ram proposed to marry Lata. Lata loved<br />

Ram. Lata accepted marriage offer from Ram. Lata has precedence of<br />

murder. Therefore, Lata murdered Sita.<br />

23.6 Conclusions<br />

The chapter outlined an application of the AI <strong>and</strong> soft computing tools in a<br />

practical system for criminal investigation. It receives four different types of<br />

inputs, namely, fingerprints, facial images, voice <strong>and</strong> incidental description<br />

about the suspects <strong>and</strong> determines the culprit with the available <strong>info</strong>rmation.<br />

The techniques used here are insensitive to small noises. For instance, the<br />

fingerprint classification will be accurate, unless the location of the core <strong>and</strong><br />

the delta points only are corrupted with noise. Secondly, the image matching<br />

scheme is also very rugged as it records the membership-distance product,<br />

which does not change much for small gaussian noise. Thirdly, the formants<br />

have adequate <strong>info</strong>rmation about a speaker. So, unless the recognition scheme<br />

is trapped at local minima during the training cycles, the correct speaker could<br />

be identified. Finally, even with noisy facts <strong>and</strong> knowledge, we can continue<br />

reasoning in an FPN <strong>and</strong> determine the culprit, which to the best of the<br />

author’s knowledge is the first successful work in this domain.<br />

The software included with this book demonstrates the scope of<br />

realization of the proposed system in practice. The interested students may<br />

execute them with the guidelines prescribed in the Appendix A. The software<br />

was developed in Pascal <strong>and</strong> C based on the considerations that the beginners<br />

in the subject may not have expertise in LISP or PROLOG.<br />

Exercises<br />

1. Given an image, whose gray values at pixel (x, y) is f(x, y). Develop a<br />

program to compute the x-gradient Gx (x, y) <strong>and</strong> y-gradient Gy (x, y) at<br />

pixel (x, y) by using<br />

Gx (x, y) = f (x+1, y) – f (x, y) <strong>and</strong><br />

Gy (x,y) = f (x, y+1) – f (x, y)

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