ANSI/NIST-ITL 1-2011 - NIST Visual Image Processing Group ...
ANSI/NIST-ITL 1-2011 - NIST Visual Image Processing Group ... 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
ANSI/NIST-ITL 1-2011Data Format for the Interchange of Biometric and Forensic Information• The first information item (Type / LQT) is the type of characteristic,selected from Table 40.• The second information item (Polygon / LQP) is a closed path outliningthe area of the distinctive feature.• The third information item (Comment / LQC) is optional and may containtext describing the quality issue.Table 40:EFS Codes of quality issue typesCodeDescriptionARTIFACTBACKGROUNDCOMPRESSEDDISTORTNEGATIVEOVERDEVOVERLAPSMEARSTRETCHEDTAPEOTHERDigital artifacts, such as occasionally caused bycompression or livescan devices.Interference with background makes following ridgesdifficult (e.g. check patterns)Distorted area in which ridges are compressed togetherMiscellaneous distortion (See also Compressed andStretched)Used if only a portion of the friction ridge image is tonallyreversed (has ridges and valleys inverted so that ridgesappear white and valleys appear black). Note that Field9.314 Tonal Reversal (TRV) is used if the entire image istonally reversed.Overdeveloped area: excessive processing medium suchas ink, powder, etc.Area in which another friction ridge impression issuperimposed over the impression of interestSmeared or smudged areaDistorted area in which ridges are stretched apart fromeach otherLifting tape artifacts (crease, bubble, etc.)Other quality issues not characterized elsewhere; detailsshould be noted in Comments117DRAFT 2
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<strong>ANSI</strong>/<strong>NIST</strong>-<strong>ITL</strong> 1-<strong>2011</strong>Data Format for the Interchange of Biometric and Forensic Information• The first information item (Type / LQT) is the type of characteristic,selected from Table 40.• The second information item (Polygon / LQP) is a closed path outliningthe area of the distinctive feature.• The third information item (Comment / LQC) is optional and may containtext describing the quality issue.Table 40:EFS Codes of quality issue typesCodeDescriptionARTIFACTBACKGROUNDCOMPRESSEDDISTORTNEGATIVEOVERDEVOVERLAPSMEARSTRETCHEDTAPEOTHERDigital artifacts, such as occasionally caused bycompression or livescan devices.Interference with background makes following ridgesdifficult (e.g. check patterns)Distorted area in which ridges are compressed togetherMiscellaneous distortion (See also Compressed andStretched)Used if only a portion of the friction ridge image is tonallyreversed (has ridges and valleys inverted so that ridgesappear white and valleys appear black). Note that Field9.314 Tonal Reversal (TRV) is used if the entire image istonally reversed.Overdeveloped area: excessive processing medium suchas ink, powder, etc.Area in which another friction ridge impression issuperimposed over the impression of interestSmeared or smudged areaDistorted area in which ridges are stretched apart fromeach otherLifting tape artifacts (crease, bubble, etc.)Other quality issues not characterized elsewhere; detailsshould be noted in Comments117DRAFT 2
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