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

ANSI/NIST-ITL 1-2011 - UPDATE 2013 DRAFT VERSION8.14 Record Type-14: Fingerprint image recordThe Type-14 record shall contain and be used to exchange exemplar fingerprint image data,such as a rolled tenprint, an identification flat, or a complete friction ridge exemplar. Allfingerprint impressions shall be acquired from a card, a single or multiple-finger flat-capturedevice, contactless fingerprint sensor that outputs 2D fingerprint images, or a live-scandevice. Captured images may be transmitted to agencies that will automatically extract thedesired feature information from the images for matching purposes. Textual informationregarding the scanning resolution, the image size and other parameters or commentsrequired to process the image are recorded as fields within the record.The Type-14 record is also used to exchange identification flats of multiple fingers(simultaneous plain impressions captured on a platen). Two of the image record codescontain the left and right simultaneous four fingers (may include extra digits, if applicable),and a third contains the two thumbs. There are also codes for two and three fingercombinations. Offsets to the locations of image segments containing the individual fingersare included with the image records for individual flat prints resulting from segmentation ofa multi-finger slap image.This standard allows simultaneous capture of fingerprint images from adjacent platens thatshare a common plane and a common side if the relative position of the fingers ismaintained and has fidelity to the subject’s finger orientations and relative length.Simultaneous capture of multiple fingers from non-adjacent platens or platens that do notshare a single plane is also allowed, but the images should be separately transmitted. Field14.026: Simultaneous capture / SCF was added as an optional field to the 2011 version ofthe standard to specifically indicate that the images were simultaneously captured.A new field Field 14.027: Stitched image flag / SIF has been added to designate an imagethat was artificially created by placing together two or more separate images, either capturedseparately or captured simultaneously on non-adjacent platens. It is strongly encouraged notto stitch together such images. This field shall be used to mark such stitched images thathave already been captured and entered into existing databases, prior to transmission usingthis standard.Additional fields are defined to contain the NIST Fingerprint Image Quality (NFIQ) metric,alternate image quality metrics, and metrics for predicting the correctness of thesegmentation.Table 84 Type-14 record layout310