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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 VERSIONNameLocalQualityCode Shorthand description Display colorDefinitive pores 5 Pores and ridge edges areobvious and unambiguousDefinitive ridge edges,debatable poresDefinitive minutiae,debatable ridge edgesDefinitive ridge flow,debatable minutiae4 Ridge edges, minutiae, andridge flow are obvious andunambiguous; pores areeither debatable or notpresent3 Minutiae, and ridge floware obvious andunambiguous; ridge edgesare debatable2 Continuity of ridge flow iscertain; minutiae aredebatableDebatable ridge flow 1 Continuity of ridge flow isuncertainAqua[RGB=(0,240,240)]Blue[RGB=(0,0,255)]Green[RGB=(0,255,0)]Yellow[RGB=(255,255,0)]Red[RGB=(255,0,0)]Background 0 No ridge in<strong>for</strong>mation Black or no color[RGB=(0,0,0)]8.9.7.7 Field 9.309: EFS ridge quality map <strong>for</strong>mat / RQFThis optional field defines the grid size or data representation <strong>for</strong>mat used in Field 9.308:EFS ridge quality/confidence map / RQM. Its use is mandatory if that field is present.This field consists of two in<strong>for</strong>mation items:• The first in<strong>for</strong>mation item (grid size / GSZ) shall be used to define gridsizes (both the horizontal and vertical dimensions of a single cell in the grid):valid settings range from “1” (0.01mm) through “41” (0.41mm). Therecommended grid size is 0.20mm (0.008”) – note this is 4 pixels at 500ppi,or 8 pixels at 1000ppi.• The second in<strong>for</strong>mation item (data <strong>for</strong>mat / RDF) defines the <strong>for</strong>mat usedin Field 9.308, using the codes defined in Table 34. For all <strong>for</strong>mats:o The first cell starts at the top left corner of the Region of Interest, withcells in order left to right.o All of the quality values <strong>for</strong> each row are stored in one repeatingsubfield.o The subfields are ordered from top to bottom.o If the width and/or height of the Region of Interest are not evenlydivisible by the Grid Size, partial cells shall be included at the rightand/or bottom of the ridge flow map.150

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