acknowledgements for ansi/nist-itl 1-2011 - NIST Visual Image ...

ANSI/NIST-ITL 1-2011 - UPDATE 2013 DRAFT VERSIONinformation such as finger position, finger segment, or full finger view. It is unlikely that anentire EJI will ever be left at the scene of a crime. But a latent may be searched against theEJIs based on a specific finger segment or full finger view. This may be accomplished for aportion of the latent described by the X and Y coordinates.Multiple portions of the EJI may be listed, each as a subfield with the same value forPDF and a different value for FIC, such as one subfield with PDF of 2 and FIC of DSTand another subfield with PDF of 2 and FIC of MED. There need not be more than onesubfield. For latents in Type-13 records, Field 13.014: Search position descriptors /SPD defines the set of all areas against which the latent should be compared. To indicatethat the latent may have come from any part of the finger, FIC should include both EJIand TIP (in different subfields). Since EJI is a superset of FV1-FV4, DST, MED andPRX, it is therefore redundant to specify any of the latter if EJI is included in FIC. If alatent in a Type-13 record is to be compared against different segments of a finger butcan be specified more precisely than simply listing EJI, multiple portions of the EJI maybe listed – in which the information item FIC indicates the appropriate area of the field.One subfield may, for example, have a PDF of 0 and FIC of DST and another subfieldwith PDF of 0 and FIC of MED. It is possible to include any combination of PDF andFICs, such as: PDF = 2 and FIC = MED; PDF = 2 and FIC = DST; PDF = 3 and FIC =MED; and PDF = 3 and FIC = DST.7.7.4.4 Print position coordinates / PPCIf Field 13.013: Friction ridge generalized position / FGP or Field 14.013: Frictionridge generalized position / FGP is set to 19 then Field 13.015: Print positioncoordinates / PPC or Field 14.015: Print position coordinates / PPC may optionallycontain offsets to the locations for the bounding box of the EJI, each of the full finger views,or segments within the EJI. When used, this field shall consist of six (6) mandatoryinformation items describing the type or portion of the image contained in this record and itslocation within an EJI. This information will describe either the location of the entire jointimage, one full finger view, or segment. Individual full finger or segment definitions maybe repeated as repeating sets of information items:• The first information item is the full finger view / FVC with values of “FV1”through “FV4”. Values of “FV1” to “FV4” specify the perspective for each fullfinger view. For a fingertip, the first information item shall be “TIP”. FVC willcontain the code “NA” if only a proximal, distal or medial segment is available.• The second information item is used to identify the location of a segment / LOSwithin a full finger view. LOS will contain the not applicable code “NA” if theimage portion refers to a full finger view, tip or to the entire joint image locations.Otherwise, it shall contain “PRX”, “DST”, “MED” for a proximal, distal, or medialsegment, respectively.• The third information item is the left horizontal coordinate / LHC. It is thehorizontal offset in pixels to the left edge of the bounding box relative to the originpositioned in the upper left corner of the image.68