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

ANSI/NIST-ITL 1-2011Data Format for the Interchange of Biometric and Forensic InformationTable 44: EFS Codes for comparison determinationsCode Name UsageINDIV Individualization The two impressions originated from the same source.INC_CInconclusive, but withcorresponding featuresnotedNo conclusive determination can be made. Corresponding features are present, and nosubstantive contradictory features are present. The correspondence of features issupportive of the conclusion that the two impressions originated from the same source,but not to the extent sufficient for individualization.This determination should be made if the examiner determines that the impressions arealmost certainly from the same source, but cannot make an individualizationdetermination. This is sometimes described as a qualified conclusion.INC_DInconclusive, but withdissimilar featuresnotedNo conclusive determination can be made. Non-corresponding features are present. Thedissimilarity of features is supportive of the conclusion that the two impressionsoriginated from different sources, but not to the extent sufficient for exclusion.This determination should be made if the examiner determines that the impressions arealmost certainly not from the same source, but cannot make an exclusion determination.This is sometimes described as a qualified exclusion.INC_NINC_IEX_SRCInconclusive due to nooverlapping areaInconclusive due toinsufficient informationExclusion of sourceIndividualization and exclusion are not possible because no corresponding or potentiallycorresponding areas of friction ridge detail are present.This determination should be made if there is sufficient information in the impressions todetermine that there are no areas in the impressions to compare, such as when oneprint is of the left half of a finger and the other is of the right half.Individualization and exclusion are not possible because of insufficient corresponding orcontradictory data. This category should be used if the specific other types ofinconclusive determinations do not apply.The two impressions originated from different sources of friction ridge skin, but thesubject cannot be excluded.EX_SUB Exclusion of subject The two impressions originated from different subjects.NONE No determination No determination has been made. (default)13.9.62 EFS Field 9.372 Skeletonized Image / SIMThe ridge path for the entire region of interest can be represented as askeletonized image, also known as a ridge tracing, which reduces the frictionridge impression to an image with thinned representations of each ridge. Theskeletonized image is a 2-tone image with a white background and a blacksingle-pixel-wide thinned representation of each ridge.The skeletonized image, also know as ridge tracing, is stored as a 1-bit grayscalePNG compressed image, bit-packed 6 bits per character using Base-64124DRAFT 2