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 actually individualized. over the last 20 years, many new and interesting advancements have taken position within the box of fingerprint technology, quite within the realm of equipment for constructing latent prints and within the development of imaging and AFIS applied sciences. This totally up to date moment variation of the bestseller, Advances in Fingerprint know-how, covers significant advancements in latent fingerprint processing, together with actual, chemical, instrumental, and blend concepts. Written through a popular team of best forensic id and criminalistic specialists, this worthwhile paintings provides intriguing growth in fingerprint technology.New during this edition:oLatent fingerprint chemistry oTechniques directed at lipid-soluble parts oMore succinct therapy of AFIS oA new technique that applies nanocrystal expertise to latent fingerprint developmentoA systematic, statistically-based standpoint concerning the individuality of fingerprints
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Extra resources for Advances in Fingerprint Technology, Second Edition
A latent print examiner can then evaluate each print and make a judgment as to whether or not there are sufficient ridge characteristics for identification. If there are insufficient ridge characteristics present, then one has to determine what other methods could be applied to the developed print for further enhancement of the print. Once a positive decision is made, the second mission is to compare the developed latent print with a known print, with the objective of either positive identification or elimination.
Lee. 0923Ch02Frame Page 42 Monday, May 14, 2001 1:31 PM Scene Processing for Latent Prints RECOGNITION Preliminary Screening Photography Lifting Laboratory Processing IDENTIFICATION Enhancement Known vs. 1 Latent fingerprint examination. niques to process such an area with the objective of developing those latent prints and making them visible. A latent print examiner can then evaluate each print and make a judgment as to whether or not there are sufficient ridge characteristics for identification.
The ridge details of the latent may be yellow and those of the inked print may be blue. The latent print is then superimposed over the inked print, and matching ridges will appear green while nonmatching ridges will appear either yellow or blue. Of course, other colors have been used. 11 A transparent grid is superimposed over the latent and inked prints, but whereas the Osborn grid has no specific measurements, the grid lines of the Osterburg grid are at 1-mm intervals. The Osterburg method, however, goes beyond simply matching characteristics in corresponding grid cells.
Advances in Fingerprint Technology, Second Edition by Henry C. Lee, Robert Ramotowski, R. E. Gaensslen