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

ANSI/NIST-ITL 1-2011Data Format for the Interchange of Biometric and Forensic InformationLoopsUnableto printUnabletoclassify- Double Loop DL I, O, or M- AccidentalWhorlRight Slant LoopLeft Slant LoopAmputationTemporarilyunable to print(e.g., bandaged)UnableClassifytoRSLSXXUPUC- Complete Scar SR- DissociatedRidges/DysplasiaDRAWI, O, or M13.7.14 EFS Field 9.308 Ridge Quality/Confidence Map / RQMLocal friction ridge quality (as defined in the Ridge Quality Map) is anassessment of confidence in small local areas within an image. The local qualitymap is used to define the confidence in all other features, and therefore is keyinformation. In addition, when the quality map indicates a high-quality region inwhich features are not marked, that information can be used as “negativefeatures” or definitive absence of features, which can be used for exclusion.Accurate and consistent markup of local quality is essential, and the guidelines inthis section should be followed as closely as possible. The names and colorcodingindicated here should be used whenever possible.For every cell in a grid superimposed on the Region of Interest, this optional fieldnotes the local ridge quality of the friction ridge detail within that cell. Local ridgequality defines clarity in terms of the ability to discern detail in a given location.The quality of each cell will be represented with a local quality (LocQ) value 0through 5 representing the quality of ridge detail in that cell, as specified in Table20, below.75DRAFT 2