Download e-book for kindle: Advances in Fingerprint Technology, Second Edition (Forensic by Henry C. Lee, Robert Ramotowski, R. E. Gaensslen

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

Fingerprints represent the most vital different types of actual proof, and it's one of the few that may be really individualized. over the last twenty years, many new and fascinating advancements have taken position within the box of fingerprint technology, really within the realm of equipment 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 mix strategies. Written via a popular workforce of prime forensic identity and criminalistic specialists, this important paintings provides interesting growth in fingerprint technology.

New during this edition:

  • Latent fingerprint chemistry
  • Techniques directed at lipid-soluble parts
  • More succinct therapy of AFIS
  • A new technique that applies nanocrystal expertise to latent fingerprint development
  • A systematic, statistically-based viewpoint concerning the individuality of fingerprints
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    Read or Download Advances in Fingerprint Technology, Second Edition (Forensic and Police Science) PDF

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    Extra info for Advances in Fingerprint Technology, Second Edition (Forensic and Police Science)

    Sample text

    The enlargements are then reversed and straight lines are drawn connecting the points punched. The geometric configuration of each print is then compared. If the polygon of pin holes between the latent and the ink print matches, the identity is declared. 3 Polygon method. 10 One approach is to place a transparent overlay over an enlargement of the latent print and mark the ridge characteristics with a suitable writing instrument. The same overlay is then placed over an enlargement of the inked print, which must be to the same scale as the latent print, and the corresponding ridge characteristics are noted.

    It is noteworthy that when Galton gave evidence before the Asquith Committee, he had 5 years of experience in the study of fingerprints, which accords with the present minimum standard requirement in order to give evidence of identity before courts of law in Great Britain. I have twice visited the Galton Laboratory in London and have had the extreme good fortune to examine one of the world’s most precious early fingerprint documents, Galton’s Photography III, a large album containing © 2001 by CRC Press LLC 0923Ch01Frame Page 33 Monday, May 14, 2001 1:34 PM much of his inspired research.

    2 Osborn grid method. 5 The two tracings are then compared by superimposing one over the other and viewing them with backlighting. By tracing each point between the latent and the known print, a comparison is made. 6 The positioning and alignment of both prints in the enlargements must be in as close agreement as possible. The enlargement of the inked print is secured to a rigid mount. The enlargement of the latent print is then cut in lateral strips and placed over the enlargement of the inked print.

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