ANSI/NIST-ITL 1-2011 - NIST Visual Image Processing Group ...

ANSI/NIST-ITL 1-2011Data Format for the Interchange of Biometric and Forensic Information13.9.57 EFS Field 9.355 Latent Matrix / LMTThis field is used to define the matrix, or substance deposited by the finger thatforms the impression. This field consists of three information items:• The first information item indicates the type of matrix, from the Codecolumn of Table 39. 45• The second information item (Comment / CLA) is optional and maycontain text that provides clarifying information regarding the matrix.Table 39:Code1EFS Codes for types of latent matricesDescriptionNatural perspiration and/or bodyoils (eccrine and/or sebaceous)Visible contaminants:2 Blood3 Paint4 Ink5 Oil or grease6 Dirt or soil7 Other visible contaminants8 Impression in pliable material9 Contaminant removal via touch10 Other/unknown matrixBrad Wing 6/23/10 1:09 PMComment: Reorganized for consistency ofpresentation13.9.58 EFS Field 9.357 Local Quality Issues / LQIThis field is used to define one or more areas containing localized quality ortransfer issues that are not fully defined using other Extended Friction RidgeFeatures. The problems noted in this field apply to the specific impression underconsideration; issues that are specific to the friction skin itself (such as scars) arenoted in (Field 9.324 Distinctive Features / DIS). This field consists of threeinformation items:Brad Wing 6/23/10 1:09 PMComment: Reorganized for consistency ofpresentation•45 Note that all visible contaminants are apparent rather than necessarily known to certainty: for example, thesubstrate may be marked as blood if it appears to be blood; if known for certain that should be indicated as a comment.116DRAFT 2