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

ANSI/NIST-ITL 1-2011Data Format for the Interchange of Biometric and Forensic InformationMnemonicCondcode*FieldnumberCharacterTypeField nameMinOccur countMaxUDF 20.100-20.990RSV 20.991 -20.995USER DEFINED FIELDSRESERVED FOR FUTURE DEFINITIONHAS O 20.996 N IMAGE HASH 0 1OIR O 20.997 ORIGINAL IMAGE REFERENCE 0 1GEO O 20.998 GEOGRAPHIC SAMPLE LOCATION 0 1GRT O⇑ AN GEOGRAPHIC REFERENCE TEXT 0 1DEG O⇑ AN DEGREE VALUE 0 1DMS O⇑ AN DEGREE MINUTE SECOND VALUE 0 1DATA M 20.999 B IMAGE DATA 1 1Key for Character type: N=Numeric; A=Alphabetic; AN=Alphanumeric; B=Binary or Base64Key for Cond. code: M=Mandatory; O=Optional; C-x=Conditional on Field x value; M⇑=Mandatory if the field/subfield isused; O⇑=Optional if the field/subfield is used.24.1 Field 20.001: 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.24.2 Field 20.002: Image designation character / IDCThis mandatory field shall be the IDC of the Type-20 record as found in the filecontent (CNT) field of the Type-1 record. It is recommended to start numbering ofthe IDCs for original images at 100.24.3 Field 20.003: OIR description / OIDThis mandatory field indicates how this record is being used. This field has avalue of 1 when there are no other Record Type-20 instances that were used togenerate the image contained in this instance of Record Type-20. When thereexist a series of images used to create an image that forms the basis of entries inother Record Types, then this field is set to 2 for all of the component images. Afinal image created from a series of images is indicated by this field being set to245DRAFT 2