CJ312 Chpt 6.docx - Chapter 6 Fingerprints I Key Terms Anthropometry A system of identification of individuals by measurement of parts of the body

CJ312 Chpt 6.docx - Chapter 6 Fingerprints I Key Terms...

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Chapter 6: Fingerprints I.Key Terms: Anthropometry : A system of identification of individuals by measurement of parts of the body, developed by Alphonse Bertillon. Arch: A class of fingerprints characterized by ridge lines that enter the print from one side and flow out the other side. digital imaging: A process through which a picture is converted into a series of square electronic dots known as pixels; the picture is manipulated by computer software that changes the numerical value of each pixel. fluoresce: To emit visible light when exposed to light of a shorter wavelength. iodine fuming: A technique for visualizing latent fingerprints by exposing them to iodine vapors. latent fingerprint: A fingerprint made by the deposit of oils and/or perspiration; it is invisible to the naked eye. Livescan: An inkless device that captures the digital images of fingerprints and palm prints and electronically transmits the images to an AFIS. loop: A class of fingerprints characterized by ridge lines that enter from one side of the pattern and curve around to exit from the same side of the pattern. Ninhydrin: A chemical reagent used to develop latent fingerprints on porous materials by reacting with amino acids in perspiration. Physical Developer: A silver nitrate–based reagent formulated to develop latent fingerprints on porous surfaces. Pixel: A square electronic dot that is used to compose a digital image. plastic print: A fingerprint impressed in a soft surface. portrait parlé: A verbal description of a perpetrator’s physical characteristics and dress provided by an eyewitness.

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