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

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ANSI/<strong>NIST</strong>-ITL 1-<strong>2011</strong> - UPDATE 2013 DRAFT VERSIONppi <strong>for</strong> transmission. Users shall utilize Record Type-14 if transmitting a fingerprint imageat greater than the limits of the 500 ppi class. <strong>Image</strong>s with scanning resolution greater thanor equal to the 1000 ppi class shall not be transmitted using Record Type-4.8.1.12 Field 1.012 Nominal resolution / NTRThis mandatory field shall be set to “00.00” if there are no Type-4 records in the transaction.See Section 8 <strong>for</strong> in<strong>for</strong>mation concerning leading zeros. This field does not apply to Type-7records in this version of the standard, unlike in previous versions, unless specified as suchby the domain or application profile.The special character that is allowed is “.”.When there are Type-4 records present, this field specifies the nominal resolution <strong>for</strong> theimage(s) being exchanged. This field shall specify the resolution in pixels per millimeter.The resolution shall be within the range 19.30 ppmm (490 ppi) to 20.08 ppmm (510 ppi).For example, a sensor that scans natively at 508ppi would list both NSR and NTR as20ppmm (=508ppi). These images should not be sampled down to exactly 500ppi. SeeSection 7.7.6.3. This field was called “Nominal transmitting resolution” in earlierversions of the standard. The mnemonic is still retained as NTR in this version.The 2007 version of the standard stated: “Any transmitting resolution within the range of theminimum scanning resolution to a value of 20.47 ppmm plus or minus 0.20 ppmm (520 ppiplus or minus 5 ppi) is permitted <strong>for</strong> the processing of high resolution records.” Thisversion of the standard specifically prohibits transmission resolution above 510 ppi (theupper limit of the 500 ppi class). Note that Appendix F maximum variance is 5 ppi and PIVmaximum variance is 10 ppi. (See Table 14 Class resolution with defined tolerance)8.1.13 Field 1.013 Domain name / DOMThis optional field identifies the domain name <strong>for</strong> the user-defined Type-2 recordimplementation. The domain name may only appear once within a transaction. It shallconsist of one or two in<strong>for</strong>mation items. See Section 6 <strong>for</strong> more in<strong>for</strong>mation and therelationship to Field 1.016 Application profile specifications / APS. All characters marked“A” ,“N” or “S” in the 'Type' column of Table 108 Character encoding set values may beused.• The mandatory first in<strong>for</strong>mation item (domain name / DNM) will uniquely identifythe agency, entity, or implementation used <strong>for</strong> <strong>for</strong>matting the fields in the Type-2record. The default value <strong>for</strong> the field shall be the North American Domainimplementation (NORAM).• An optional second in<strong>for</strong>mation item (domain version number / DVN) shallcontain the unique version of the particular implementation, such as 7.02.8.1.14 Field 1.014 Greenwich mean time / GMTThis optional field provides a mechanism <strong>for</strong> expressing the date and time [2013a>] of thetransaction [

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