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

ANSI/NIST-ITL 1-2011 - UPDATE 2013 DRAFT VERSION7.7.12.1 Type-9 extended feature set (EFS) pathsThe vertices for paths in the EFS Type-9 records are defined in a single information item 43for each of the following fields (See Table 30 Type-9 Fields for EFS). If multiple paths arepresent, they are stored within separate subfields. Each vertex is expressed as an (X,Y) pairof non-negative 44 integers in units of 10 micrometers (0.01mm).The Extended Feature Set used in the Record Type-9: Minutiae data record wasdeveloped as a separate encoding structure that has been incorporated into this standard. Inorder to avoid conflicts with systems that had already programmed using the EFS method ofspecifying paths, that structure is retained in this standard.EFS fields using closed paths, and requiring at least 3 vertices, are:• Field 9.300: EFS region of interest / ROI• Field 9.302: EFS finger - palm - plantar position / FPP• Field 9.324: EFS distinctive features / DIS• Field 9.357: EFS local quality issues / LQI• Field 9.360: EFS area of correspondence / AOCAn open path is a series of connected points in which there is not an implicit connectionbetween the last and first vertices. Within EFS, open paths are used in Field 9.373: EFSridge path segments / RPS.7.7.12.2 All other fields specifying pathsThe first information item is dependent upon the Record Type and field.• In Field 10.033: Feature contours / FEC which is an open path, the firstinformation item is the feature contour code / FCC, selected from the “Code”column of Table 18.• In Record Type-17 Fields 17.033 through 17.036, and in Field 10.015: Face imagepath coordinates in full image / FPFI the first information item is the boundarycode / BYC, with an alphabetic value selected from the “Code” column of Table 19.• For Field 10.045: Occlusions / OCC and Field 17.037: Non-eyelid occlusions /NEO, the first information item is the occlusion opacity / OCY, selected from the“Code” column of able 20.• In Field 14.025: Alternate finger segment position(s) / ASEG and Field 19.019:Friction ridge - toe segment position(s) / FSP the first information item contains afriction ridge generalized position / FGP, an integer from Table 8.43In Traditional encoding, it is entered as a single string of “x1,y1-x2,y2-…-xN,yN” where xK indicates theK th vertex, up to the total number of vertices. A comma “,” shall be entered between the X and Ycoordinates of a vertex in this string, and a dash “-“ shall be entered between coordinate pairs.44[2013e>] Error correction from first edition: postitive integers → non-negative integers [