ANSI/NIST-ITL 1-2011 - NIST Visual Image Processing Group ...

ANSI/NIST-ITL 1-2011Data Format for the Interchange of Biometric and Forensic InformationTable 10 Type 7 record dataMnemonic Condcode*Field Characternumber TypeField nameOccur countMinMaxM 7.001 RECORD HEADER 1 1IDC M 7.002 N IMAGE DESIGNATION CHARACTER 1 1--- O 7.003 USER DEFINED FIELDS 0 UnlimitedCondition codes: M = Mandatory; O= Optional;C-field number = Conditional upon the value of the field referenced.11.1 Field 7.001: Record headerThe content of this field depends upon the encoding chosen. Seewww.biometrics.nist.gov/standard for the content of this field for the encodingused. In Traditional encoding, the content is the length of the record. In NIEMconformantencoding it is the record type-number.11.2 Field 7.002: Image designation character / IDCThis mandatory field shall be the IDC of the Type-7 logical record as found in thefile content (CNT) field of the Type-1 record.11.3 User-defined fields for Type-7 logical recordThe remaining fields of the Type-7 logical record shall be user-defined.Individual fields required for a given transaction, such as field description, size,binary or grayscale nature of the data, and content shall conform to thespecifications set forth by the agency to which the transmission is being sent.12 Type-8 signature image recordType-8 records shall contain either scanned or vectored signature data. EachType-8 record shall cover an area of up to 1000 mm 2 .If scanned, the resolution shall be the minimum scanning resolution or the nativescanning resolution, and the scan sequence shall be left to right and top tobottom. The scanned data shall be a binary representation quantized to twolevels.If vectored signature data is present, it shall be expressed as a series of binarynumbers.36DRAFT 2