Read e-book online Advances in Fingerprint Technology, Second Edition PDF

By Henry C. Lee, Robert Ramotowski, R. E. Gaensslen

ISBN-10: 0849309239

ISBN-13: 9780849309236

Fingerprints represent probably the most very important different types of actual proof, and it really is one of the few that may be really individualized. over the last 20 years, many new and intriguing advancements have taken position within the box of fingerprint technology, really within the realm of tools for constructing latent prints and within the progress of imaging and AFIS applied sciences. This totally up to date moment version of the bestseller, Advances in Fingerprint know-how, covers significant advancements in latent fingerprint processing, together with actual, chemical, instrumental, and mixture strategies. Written via a popular crew of top forensic identity and criminalistic specialists, this worthy paintings provides fascinating development in fingerprint technology.New during this edition:oLatent fingerprint chemistry oTechniques directed at lipid-soluble elements oMore succinct therapy of AFIS oA new process that applies nanocrystal know-how to latent fingerprint developmentoA systematic, statistically-based perspective concerning the individuality of fingerprints

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Extra resources for Advances in Fingerprint Technology, Second Edition

Example text

Sometimes an elliptical whorl is seen on this eminence. Fingerprint Classification A major step forward in the use of fingerprints was a method of classification that enabled fingerprint forms bearing differing patterns to be placed in a certain order, thus enabling the search area to be minimized. If a classification system did not exist, and a person gave a wrong name, each set of fingerprint forms would have to be examined to discover the correct identity of the offender; the person would obviously not be traced by doing an alphabetical check.

This number always remains the same for the individual, and as the individual ages and collects convictions, the file accordingly gets thicker, all convictions in the file being confirmed by fingerprints taken at the time of arrest. It does happen that a person gives a fictitious name when fingerprinted, and if dealt with expeditiously at court, previous convictions will not be cited and punishment will be dealt out as if for a first-time offender. In the meantime, the routine is inexorably taking place: the fictitious name with the associated fingerprint classification is not found after a name search, and so the fingerprint form is then searched through the fingerprint collection.

If all fingerprint patterns were whorls, the classification would be 32 32 The Henry system therefore divided all fingerprint forms into 1024 bundles. It is quite obvious that if fingerprint forms are filed according to this system, the searcher chooses the bundle bearing the appropriate Henry fraction and merely searches this one bundle. There are further subclassifications, which mean that every bundle can be further divided for searching. Unfortunately, some fingerprint patterns merge their characteristics and have to be searched as alternatives, meaning that additional bundles have to be examined in order to positively conclude a search.

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Advances in Fingerprint Technology, Second Edition by Henry C. Lee, Robert Ramotowski, R. E. Gaensslen


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