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

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ANSI/NIST-ITL 1-2011Data Format for the Interchange of Biometric and Forensic InformationMnemonicCondcode*FieldnumberCharacterTypeField nameMinOccur countMax10.990RSV 10.991-10.995RESERVED FOR FUTURE DEFINITIONHAS O 10.996 N IMAGE HASH 0 1OIV O 10.997 ORIGINAL IMAGE REFERENCE 0 1OIR M⇑ N ORIGINAL IMAGE REFERENCE CODE 1 1RTV O⇑ N SEGMENTATION REFERENCE VALUE 0 1GEO O 10.998 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 10.999 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.14.1 Field 10.001 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.14.2 Field 10.002 Image designation character / IDCThis mandatory field shall be used to identify the text information contained inthis record. The IDC contained in this field shall be the IDC of the Type-10record as found in the file content (CNT) field of the Type-1 record.14.3 Field 10.003: Image type / IMTThis mandatory ASCII field is used to indicate the type of image contained in thisrecord. It shall contain "FACE", "SCAR", "MARK", or "TATTOO" to indicate theappropriate image type. If Field 10.042, information item SMI contains“CHEMICAL” OR “BRANDED” OR “CUT” then field 10.003 should be marked“TATTOO”, since it is a deliberately applied or drawn image.14.4 Field 10.004: Source agency / ORI / SRCThis mandatory ASCII field shall contain the identification of the administration ororganization that originally captured the image contained in the record. Normally,Brad Wing 6/21/10 9:26 AMComment: Note new explanation and crossreferenceto 10.042.132DRAFT 2
ANSI/NIST-ITL 1-2011Data Format for the Interchange of Biometric and Forensic Informationthe Originating Agency Identifier, ORI, of the agency that captured the image willbe contained in this field. The SRC shall be defined by the user and be inaccordance with the receiving agency.14.5 Field 10.005: Photo date / PHDThis mandatory ASCII field shall contain the date that the facial or SMT imagecontained in the record was captured.The YYYY characters shall represent the year the image was captured; the MMcharacters shall be the tens and units values of the month; and the DDcharacters shall be the tens and units values of the day in the month. See therules for encodings to get the format of this field.14.6 Field 10.006: Horizontal line length / HLLThis mandatory ASCII field shall contain the number of pixels contained on asingle horizontal line of the transmitted image.14.7 Field 10.007: Vertical line length / VLLThis mandatory ASCII field shall contain the number of horizontal lines containedin the transmitted image.14.8 Field 10.008: Scale units / SLCThis mandatory ASCII field shall specify the units used to describe the imagesampling frequency (pixel density). A "1" in this field indicates pixels per inch, ora "2" indicates pixels per centimeter. A "0" in this field indicates no scale isgiven. For this case, the quotient of HPS/VPS gives the pixel aspect ratio.14.9 Field 10.009: Horizontal pixel scale / HPSThis mandatory ASCII field shall specify the integer pixel density used in thehorizontal direction of the transmitted image providing the SLC contains a "1" ora "2". Otherwise, it indicates the horizontal component of the pixel aspect ratio.14.10 Field 10.010: Vertical pixel scale / VPSThis mandatory ASCII field shall specify the integer pixel density used in thevertical direction of the transmitted image providing the SLC contains a "1" or a"2". Otherwise, it indicates the vertical component of the pixel aspect ratio.14.11 Field 10.011: Compression algorithm / CGAThis mandatory ASCII field shall contain an entry from Table 2 (other than WSQ)to specify the algorithm used for compressing the color or grayscale image. Anentry of "NONE" in this field indicates that the data contained in this record isuncompressed. The image shall be represented as an array of n rows by mcolumns by at least 8-bit pixels. Each pixel in a monochrome image shall berepresented by eight or more bits. Color images shall be represented as a seriesof sequential samples of a red, green, and blue intensity for each pixel. Theimage shall be organized in row-major order, with the lowest addressBrad Wing 6/20/10 2:18 PMComment: Revised to be encoding neutral133DRAFT 2
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