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

ANSI/NIST-ITL 1-2011 - UPDATE 2013 DRAFT VERSIONrepresentation from which the biometric data was derived that is included in theparticular instance of Record Type xx. Also in the Field xx.997 is an optionalsecond information item reference segment position / RSP, described in Section7.3.2.2. It contains the index to a particular set of segmentation coordinates of thesource representation.• The second index (to a Type-21 record) is described in Section 7.3.3. It is stored inField xx.995, which is an optional field. Type-21 records (in the transaction)contain images, or audio / visual recordings that may be associated with thecollection of the biometric sample, but are NOT the actual source of the sample. Anexample might be a general picture of where the latent prints were captured. Theindex to Record Type-21: Associated context record, (See Section 7.3.3.1) iscontained in an information item in Field xx.995. There may be multiple subfieldsin Field xx.995 for a particular instance of a record, with each containing a differentACN. A second information item is the associated segment position / ASPdescribed in Section 7.3.3.2. It contains the index to a particular set of segmentationcoordinates of the associated context data.Also new to this version of the standard are two fields that contain indexes to allow linkinginstances of a particular Record Type.• Field 10.039: Type-10 reference number / T10 explicitly handles Type-10 imagesthat are of the same body part, such as a larger image and zoomed-in images. (SeeSection 7.3.4).• Field 14.026: Simultaneous capture / SCF explicitly links finger images that werecaptured simultaneously on non-contiguous platens or other image capturetechnologies that do not capture the finger images in a manner preserving fullrelative position of the finger tips to each other, if placed in a single image. (SeeSection 7.3.5).7.3.1 Information designation character / IDCEach of the records present in a transaction, with the exception of the Type-1 record, shallinclude a field (xx.002) containing the information designation character / IDC 17 . Thevalue of the IDC shall be a sequentially assigned integer starting from zero and incrementedby one up to a maximum of 99. IDC references are stated in Type-1 Field 1.003Transaction content / CNT and shall be used to relate information items in the CNT fieldof the Type-1 record to the other records in the transaction. Two or more records may sharea single IDC solely to identify and link together records that pertain to differentrepresentations of the same biometric trait.• Most frequently, IDCs are used to link a particular finger/palm/plantar image (in aType - 4, 13, 14, 15, 19 record) with the corresponding Type-9 minutiae record.17This was called the image designation character in earlier versions of the standard. The mnemonic isthe same.46