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

ANSI/NIST-ITL 1-2011 - UPDATE 2013 DRAFT VERSIONSee Section 8.9.7 for a general description of ROI. This mandatory field defines arectangle (and an optional polygon) that bounds the region of the image that contains thefingerprint of interest and separates it from the background and any other fingerprintspresent in the image. This field contains five information items. Width and height aremandatory. The other items are optional.• The first information item (width / EWI) is the integer width of the region ofinterest in units of 10 micrometers (0.01mm)• The second information item (height / EHI) is the height of the region of interest inunits of 10 micrometers (0.01mm).• The third information item (horizontal offset / EHO) is the horizontal distance inunits of 10 micrometers from the left edge of the original image to the left edge ofthe region of interest. This information item defaults to a value of zero if absent.• The fourth information item (vertical offset / EVO) is the vertical distance in unitsof 10 micrometers from the top edge of the original image to the top edge of theregion of interest. This information item defaults to a value of zero if absent.• The fifth information item (ROI Polygon / ROP) contains a polygon (closed path)that further defines the friction ridge area under consideration within the ROI.The format of polygons is described in Section 7.7.12. If the polygon isdefined, the ROI rectangle shall be the bounding box for the polygon. Thevertices of the polygon are relative to the ROI. [2013a>] In Traditionalencoding, the two special characters allowed are hyphen and comma.[