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

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ANSI/NIST-ITL 1-2011 - UPDATE 2013 DRAFT VERSIONcenter of the gap in the ridge.• A discontinuity is a point where the ridge stops briefly and restarts again withoutshifting. A wider gap in the ridge flow, or where the ridges do not line up across thedivide, should be marked as two ridge endings, not a discontinuity. A series ofdiscontinuities in a line (such as a cut or crack) should be marked as a lineardiscontinuity, using the Field 9.342: EFS creases and linear discontinuities /CLD. A discontinuity is marked at the center of the gap in the ridge.This field consists of three information items. The first two ('x' coordinate/ CLX and 'y'coordinate ' CLY) are the coordinates of one endpoint in units of 10 micrometers (0.01 mm).The third information item is the type / CLT of feature. It is:P (Protrusion), I (Indentation), or D (Discontinuity).F.6.6Corresponding featuresThese fields are used to define the areas or points that correspond or do not correspond betweentwo or more of the images contained in the current transaction: when images are compared ascandidates for individualization (potential mates), the corresponding areas and points can beretained in these fields; similarly, the reasons for complex exclusions can be indicated. Points ofCorrespondence may be marked using any type of feature, and are explicitly not limited tominutiae.Comparison features are especially appropriate in transactions in which one latent image isbundled with one or more candidate/potential match images in order to show which areas andpoints in the latent image correspond to areas and points in the candidate images. Suchtransactions may be useful for exchanges between examiners, or for communicating resultsback from AFIS searches. See Figure 12: EFS areas and points of correspondence in rolledexemplar, latent, and plain exemplar images for an example. The latent illustrated has twodifferent areas of correspondence, one for each of the exemplars.F.6.7.1 Field 9.361: EFS corresponding points or features / CPF instructionsThis field, described in Section 8.9.7.48 , is used to label points or features for comparison ofthe current feature set with other Type-9 feature sets in this transaction, as illustrated in Figure10: EFS locations of major flexion creases.This field is to be used only when two or moreimages contained in a single transaction are compared, either as candidates for individualization(potential mates), or for annotating reasons for exclusion. For each of the images beingcompared, specific points or features are marked in each of the type-9 records, withcorrespondence indicated by the use of the same label. Labels within a single Type-9 recordshall be unique.May, 2013 DRAFT VERSION UPDATE 2013 Page 499
ANSI/NIST-ITL 1-2011 - UPDATE 2013 DRAFT VERSIONFor example, if a transaction contains one latent and multiple candidate exemplars, a featurelabeled “A” in the latent’s Type-9 feature set corresponds with the feature labeled “A” (ifpresent) in all of the exemplar Type-9 feature sets.Table 120: Informal explanation of types of corresponding points and featuresCategory Type Code DescriptionDefinitecorrespondencePossible ordebatablecorrespondenceDefinite lack ofcorrespondenceFeaturePointDebatableFeatureDebatablePointDoes notexistFPDFDPXThe labeled feature definitely corresponds to the feature defined bythe corresponding field number / CFN and corresponding fieldoccurrence / FOC information items. ( corresponding xcoordinate / CXC and corresponding Y coordinate / CYC areunused)Informally: It definitely exists & it corresponds to this specificminutia (or dot, pore, core, etc)The labeled feature definitely corresponds to the location with thecoordinates defined in the corresponding x coordinate / CXC andcorresponding Y coordinate / CYC information items.(corresponding field number / CFN and corresponding fieldoccurrence / FOC information items are unused)Informally: It definitely exists & it corresponds to this specificpoint (allows quick definition of points, rather than having todefine each feature)The labeled feature may debatably correspond to the featuredefined by the corresponding field number / CFN andcorresponding field occurrence / FOC information items. (corresponding x coordinate / CXC and corresponding Ycoordinate / CYC information items are unused).Informally: It appears to correspond to this specific minutia (ordot, pore, core, etc), but it isn’t clear enough to be certain.The labeled feature may debatably correspond to the location withthe coordinates defined in the corresponding x coordinate / CXCand corresponding Y coordinate / CYC information items. (corresponding field number / CFN and corresponding fieldoccurrence / FOC information items are unused)Informally: It appears to correspond to this specific point, but itisn’t clear enough to be certain.The labeled feature definitely does not exist in the impression, andthe consistency of presentation of the potentially correspondingregion is sufficient to make a definite determination.(corresponding x coordinate / CXC, corresponding Ycoordinate / CYC, corresponding field number / CFN andcorresponding field occurrence / FOC information items mayoptionally be used 201 )Informally: The feature isn’t there, and the regions correspondenough that I would be able to see it if it were there – this ispresumably a justification for an exclusion.201[2013n>] 2011 version stated that these are unused. It is changed in the 2013 Update to state that theymay optionally be used. [
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NIST Special Publication 500-xxxANS
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5.3.18 Type-18 records ............
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8.1.4 Field 1.004 Type of transacti
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8.9.7.18 Field 9.322: EFS core delt
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8.11 Record Type-11: Forensic and i
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8.14.2 Field 14.002: Information de
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8.17 Record Type-17: Iris image rec
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8.19.24 Field 19.902: Annotation in
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8.24.6 Field 99.101: Biometric type
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F.6.3 Reference points.............
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Figure 34: Palm with carpal delta a
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Table 31 Off-center fingerprint pos
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Table 95 DNA sample cellular types.
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Type-11:A new record type introduce
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ACKNOWLEDGEMENTS FOR ANSI/NIST-ITL
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Will Graves, Rob Mungovan, Catherin
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John ManzoFBI/BIOMETRICS Center ofE
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General Editor: Brad Wing[2013a>]AC
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CANVASSEES For the 2013 UpdateTO BE
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ANSI/NIST-ITL 1-2011 - UPDATE 2013
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