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

ANSI/NIST-ITL 1-2011 - UPDATE 2013 DRAFT VERSIONTable 45 EFS codes for methods of ridge countingDefinition Value DescriptionAutoManual TracingManual Ridge CountATMThe ridge count was automaticallyperformed without human review.The ridge count was automaticallydetermined, based on a skeletonizedimage created by a human examiner.The ridge count was determined orvalidated manually by a humanexaminer.8.9.7.29 Field 9.340: EFS dots / DOTA dot is a single or partial ridge unit that is shorter than local ridge width. Longer ridgeunits are considered standard ridges and should be marked as such, with two ridgeendings. Potential dots that are substantially thinner than local ridge width should bemarked as incipient ridges. A dot is marked by its center point. Elongated dots mayoptionally have their length marked along the longest dimension.When no dots are present, this field shall not be used. See Table 117: Features andCorresponding presence fields .This field consists of a repeating subfield (one for each dot) with the following threeinformation items:• The first information item (dot ‘x’ coordinate / DOX) is the x coordinateof the center of the dot, expressed in units of 10 micrometers (0.01mm).• The second information item (dot ‘y’ coordinate / DOY) is the ycoordinate of the center of the dot, expressed in units of 10 micrometers(0.01mm).• The third information item (dot length / DOL) is an optional informationitem containing the length of the dot along its longest dimension in integerunits of 10 micrometers.8.9.7.30 Field 9.341: EFS incipient ridges / INRAn incipient ridge is a thin ridge, substantially thinner than local ridge width. Anincipient is marked as one or more line segments, each defined with the (X, Y) endpointsalong its longest dimension.[2013a>] An incipient ridge is marked with a line segment along its longest dimension.If the incipient is composed of a series of segments:• mark the incipient ridge as a single line when the segments of the incipientare close together or the separations between segments are indistinctMay, 2013 DRAFT VERSION UPDATE 2013 Page 167