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

ANSI/NIST-ITL 1-2011Data Format for the Interchange of Biometric and Forensic InformationrighteyebrowchinCurvature of top of subject’sright eye socketChinfaceoutline Face outline includes theentire head, all facial hair, andears14.31 Field 10.033: Feature contours / FECThis optional field contains four information items: contour code (see Table 59)and the number of points defining the contour and for each point on the contourthe x position and y position. Contours are polylines (i.e., open line segmentsthat do not close or overlap) or sequences of points that generally increase fromleft to right and top to bottom.Each subfield consists of the following data. A minimum of three points isrequired to describe a feature contour.Table 59 Feature Contours Field DescriptionSubfield /InformationitemDescriptionMnemonic1 Contour code CTC233 / 13 / 2Number of points onthe polyline, between 3and 99Subfield containing thepixel offset of thevertexHorizontal pixel offset(X) relative to theorigin positioned in theupper left corner of theimageVertical pixel offset (Y)relative to the originpositioned in the upperPPQPPVPHVPVV160DRAFT 2