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

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ANSI/NIST-ITL 1-2011 - UPDATE 2013 DRAFT VERSIONMRC. The value for this field shall be selected from the “Code” column of Table 44.Table 44 EFS codes for minutiae ridge count algorithmsCodeOCTANTEFTS7QUADRANTDescriptionThe minutiae used for ridge counts are the nearest neighbors in eightoctants, with the center of the 0th octant defined by the current minutia’stheta, and the 1st through 7th octants proceeding counter clockwise. Ridgecount values are set to number of intervening ridges. (Default)Identical to OCTANT algorithm, except that ridge count values are onemore than the number of intervening ridges. This was the format used bythe FBI in its EFTS Version 7.1The minutiae used for ridge counts are the nearest neighbors in fourquadrants, defined by the image's vertical and horizontal axes. Thequadrants, with the 1 st quadrant at the upper right and the 2 nd through 4 thquadrants proceeding counterclockwise. Ridge count values are set to thenumber of intervening ridges.8.9.7.26 Field 9.333: EFS minutiae ridge counts / MRCThis field contains the counts of intervening ridges between specified minutiae. Field9.332: EFS minutiae ridge count algorithm / MRA governs how the minutiae areselected for ridge counts, and the details of how the ridges are counted. Each ridge countis represented in a separate subfield.Field 9.335: EFS minutiae ridge count confidence / RCC may be used to indicate ridgecount confidence between minutiae. If Field 9.372: EFS skeletonized image / SIM isused, ridge counts can be derived from that field rather than included explicitly.Each subfield consists of five information items:• The first information item (minutia index A / MIA) contains the (1-based) 89 index of the first minutia.• The second information item (minutia index B / MIB) contains the (1-based) 89 index of the second minutia.• The third information item (ridge count / MIR) contains the number ofintervening ridges between minutiae A and B. Unknown ridge counts shallbe omitted (left empty). The Field 9.332: EFS minutiae ridge countalgorithm / MRA governs other details or special cases (if any).• The fourth information item (reference number / MRN) is optional and,if used, contains a reference number specific to the ridge count algorithm.For the OCTANT and EFTS7 ridge count algorithms, this information89[2013a>] Text added for clarity [
ANSI/NIST-ITL 1-2011 - UPDATE 2013 DRAFT VERSIONitem specifies the octant. For the QUADRANT ridge count algorithms,this information item specifies the quadrant.• The fifth information item (residual / MRS) is optional and is specific tothe OCTANT and EFTS7 ridge count algorithms, specifying the half of theoctant in which the neighboring minutia lies. The residual is 0 if theneighboring minutia lies in the clockwise half of the octant, or 1 if theminutia lies in the counterclockwise half of the octant.8.9.7.27 Field 9.334: EFS no minutiae present / NMINThis optional field indicates whether the analysis determined that no minutiae could bediscerned in the image. If the analysis process has determined that no minutiae could bediscerned in the image, this field shall be set to Y; otherwise, this field will be omitted.See Table 117: Features and Corresponding presence fields .8.9.7.28 Field 9.335: EFS minutiae ridge count confidence / RCCThis field is optional if Field 9.333: EFS minutiae ridge counts / MRC appears in therecord 90 . It is used to indicate confidence in intervening ridge counts between any twopoints. Each ridge count confidence value is represented in a separate data entry(repeating subfield). While primarily used to indicate ridge count confidence betweenminutiae, this confidence measure may also apply to other features such as Core/Deltaridge counts. If this field not used, the default assumption is that the ridge counts weremanually determined. This field provides a means to save state when only a portion ofridge counts have been manually checked. This field consists of six information items:• The first information item (ax / ACX) contains the x coordinates for PointA, in units of 10 micrometers (0.01mm).• The second information item (ay / ACY) contains the y coordinates forPoint A, in units of 10 micrometers (0.01mm).• The third information item (bx / BCX) contains the x coordinates for PointB, in units of 10 micrometers (0.01mm).• The fourth information item (by / BCY) contains the y coordinates forPoint B, in units of 10 micrometers (0.01mm).• The fifth information item (method of ridge counting / MORC) statesthe method by which ridge counts were determined and/or validatedselected from Table 45.• The sixth information item (confidence value / MCV) contains the integerconfidence value for a ridge count from 0 to 99, with 0 indicating noconfidence.90[2013a>] clarification of when the field can appear, even though it it optional [
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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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