NEW NIST LATENT FINGERPRINT DATABASE RELEASED.NIST (National Institute of Standards & Technology, Washington, DC, www.nist.gov) The standards-defining agency of the U.S. government, formerly the National Bureau of Standards. It is one of three agencies that fall under the Technology Administration (www.technology. , in conjunction with the FBI, has developed a new database of grayscale In computing, a grayscale or greyscale digital image is an image in which the value of each pixel is a single sample. Displayed images of this sort are typically composed of shades of gray, varying from black at the weakest intensity to white at the strongest, though in fingerprint images and corresponding minutiae mi·nu·ti·a n. pl. mi·nu·ti·ae A small or trivial detail: "the minutiae of experimental and mathematical procedure" Frederick Turner. data. NIST Special Database 27, "Fingerprint Minutiae from Latent and Matching Tenprint Images," contains latent fingerprints from crime scenes and their matching rolled fingerprint mates. The uniqueness of a fingerprint can be determined by the pattern of ridges and furrows as well as the minutiae points. The minutiae points are local ridge characteristics that occur either where a ridge divides into two or at a ridge ending. The database has a total of 258 latent cases; each case includes the latent image An invisible image typically of electrical charges. For example, in a copy machine, a latent image of the page to be copied is created on a plate or drum as an electrical charge. , the matching tenprint image, and four sets of minutiae that have been validated by a professional team of latent examiners. One set of minutiae contains all minutiae points on the latent fingerprint; the second set contains all minutiae points on the tenprint mate; the other two sets contain the minutiae points in common between the latent fingerprint and tenprint mate. In all, there are 27 426 minutiae recorded across the set of tenprints with 5460 minutiae in common with their matching latent fingerprint. Software utilities are provided to read, write, and manipulate these files. The database can be used to develop and test new fingerprint algorithms, test commercial and research Automated Fingerprint Identification Systems (AFIS AFIS Automated Fingerprint Identification System AFIS Aerodrome Flight Information Service AFIS Armed Forces Radio and Television Service AFIS Airborne Flight Information System AFIS Automated Fingerprinting Identification System (Pakistan) ), train latent examiners, and promote the ANSI/NIST file format standard. It is available on CD by ordering from the NIST Standard Reference Data web site. Examples from this database are located at the anonymous FTP An FTP site on the Internet that contains files that can be downloaded by anyone. The anonymous FTP directory is isolated from the rest of the system and will generally not accept uploads from users. site sequoyah.nist.gov at /pub/databases/data/sd27.tar. |
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