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

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

biometrics.nist.gov
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ANSI/NIST-ITL 1-2011 - UPDATE 2013 DRAFT VERSIONCategory Type Code DescriptionOut ofregionRThe labeled feature is not visible in the impression because it liesoutside of the area of correspondence for this image: the featuremay or may not be present, but the impression does not include therelevant area (corresponding x coordinate / CXC, correspondingY coordinate / CYC, corresponding field number / CFN andcorresponding field occurrence / FOC information items areunused)Informally: It isn’t in the area of overlap, so I can’t say anything.InconclusiveUnclearareaUThe labeled feature is not visible in the impression because thepotentially corresponding region is not sufficiently clear: thefeature may or may not be present, but local quality issues preventa definite determination. (corresponding x coordinate / CXC,corresponding Y coordinate / CYC, corresponding fieldnumber / CFN and corresponding field occurrence / FOCinformation items are unused)Informally: I can’t tell if the feature is there because the areawhere it would be is smudged or otherwise unclear.Corresponding Points or Features may refer to arbitrary points, or may refer to predefinedfeatures (as noted in Table 120 and Table 54 EFS codes for field numbers used forcorresponding features). Note that the features include point features (such as minutiae, dots,or pores), but also may refer to areas (such as distinctive characteristics), lines (incipients orcreases), or paths (ridge path segments).Arbitrary points may be used to indicate characteristics that were not noted during analysis, orto indicate points in an exemplar that was not previously marked up. For example, see Table121. Assume that a latent and exemplar are both present in a transaction, and that the latent andexemplar columns in these tables are examples from Field 9.361: EFS corresponding pointsor features / CPF from different type-9 records in a single transaction. The label “M1”indicates that the latent minutia (stored in Field 9.331: EFS minutiae / MIN) #5 correspondsto corresponds to location (1024,765) within the exemplar’s 8.9.7.0.2 EFS region of interest.The label / COL “X1” indicates that the dot ( Field 9.340: EFS dots / DOT) #1 does not existwithin the exemplar image.Field 9.361 consists of the following information items:The first information item, label / COL, 1-3 character alphanumeric label used to indicatecorrespondence between feature points in different type-9 records within the same transaction.Labels within a single Type-9 record shall be unique. Note that the use of a given label in onetype-9 record means that that point or feature corresponds with any or all other features with thesame label in other type-9 records in the transaction.May, 2013 DRAFT VERSION UPDATE 2013 Page 501

ANSI/NIST-ITL 1-2011 - UPDATE 2013 DRAFT VERSIONTable 121: Examples of corresponding points and featuresField 9.361 information Item Latent Exemplar Latent Exemplarlabel / COL M1 M1 X1 X1type of correspondence /TOC(from Table 120: Informalexplanation of types ofcorresponding points andfeatures)corresponding fieldnumber / CFNcorresponding fieldoccurrence / FOCcorresponding x coordinate /CXCcorresponding y coordinate /CYCF P F X331 3405 11024 846 202765 992 202The second information item, type of correspondence / TOC, is a 1-2 character informationitem and is set to the appropriate value from Table 120.The third information item, corresponding field number / CFN, is used only if TOC = F orDF) This information item indicates the field being compared as shown in Table 121:Examples of corresponding points and features. Note that these are simply the Type-9 fieldnumbers of the fields that can be used for comparisons.The fourth information item, corresponding field occurrence / FOC, is used only if TOC =F or DF) This information item indicates which subfield (occurrence) of the specified field towhich the label is applied. This is a 1-based index, not a 0-based index: occurrences arenumbered (1…count), not (0…count-1).The fifth and sixth information items (corresponding x coordinate / CXC and correspondingy coordinate / CYC) are used only if TOC = P or DP) These two optional information itemsdefine the location of the CPF, in units of 10 micrometers (0.01mm).[2013a>] If the type of correspondence is “X”, the CXC and CYC information items mayoptionally be used to specify the location where the specified feature would have beenexpected. For example, for the example used to ilustrate code X in Table 120: Informalexplanation of types of corresponding points and features, if the dot with the lable“X1” is present in the latent image, but is definitely not present in the exemplar, the lable“X1” is specified for the exemplar with the approximate location where the dot would havebeen expected. This is to allow the user interface to indicate the location of the missing202[2013n>] Added in the 2013 Update to allow optional specification of coordinates for type X[

ANSI/<strong>NIST</strong>-ITL 1-<strong>2011</strong> - UPDATE 2013 DRAFT VERSIONTable 121: Examples of corresponding points and featuresField 9.361 in<strong>for</strong>mation Item Latent Exemplar Latent Exemplarlabel / COL M1 M1 X1 X1type of correspondence /TOC(from Table 120: In<strong>for</strong>malexplanation of types ofcorresponding points andfeatures)corresponding fieldnumber / CFNcorresponding fieldoccurrence / FOCcorresponding x coordinate /CXCcorresponding y coordinate /CYCF P F X331 3405 11024 846 202765 992 202The second in<strong>for</strong>mation item, type of correspondence / TOC, is a 1-2 character in<strong>for</strong>mationitem and is set to the appropriate value from Table 120.The third in<strong>for</strong>mation item, corresponding field number / CFN, is used only if TOC = F orDF) This in<strong>for</strong>mation item indicates the field being compared as shown in Table 121:Examples of corresponding points and features. Note that these are simply the Type-9 fieldnumbers of the fields that can be used <strong>for</strong> comparisons.The fourth in<strong>for</strong>mation item, corresponding field occurrence / FOC, is used only if TOC =F or DF) This in<strong>for</strong>mation item indicates which subfield (occurrence) of the specified field towhich the label is applied. This is a 1-based index, not a 0-based index: occurrences arenumbered (1…count), not (0…count-1).The fifth and sixth in<strong>for</strong>mation items (corresponding x coordinate / CXC and correspondingy coordinate / CYC) are used only if TOC = P or DP) These two optional in<strong>for</strong>mation itemsdefine the location of the CPF, in units of 10 micrometers (0.01mm).[2013a>] If the type of correspondence is “X”, the CXC and CYC in<strong>for</strong>mation items mayoptionally be used to specify the location where the specified feature would have beenexpected. For example, <strong>for</strong> the example used to ilustrate code X in Table 120: In<strong>for</strong>malexplanation of types of corresponding points and features, if the dot with the lable“X1” is present in the latent image, but is definitely not present in the exemplar, the lable“X1” is specified <strong>for</strong> the exemplar with the approximate location where the dot would havebeen expected. This is to allow the user interface to indicate the location of the missing202[2013n>] Added in the 2013 Update to allow optional specification of coordinates <strong>for</strong> type X[

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