Results of Fingerprint Image Quality Experiments

摘要

A series of experiments were conducted to determine the variation in the scores developed using a matching algorithm designated as the M-82 for mating fingerprints of different image quality that had been read by the Automatic Fingerprint Reader System (AFRS) of the FBI. The variations in image quality resulted from the use of a variety of card stocks and recording techniques to record the print of a single finger. For each image recording process, a sample of 56 finger-pairs were matched and mean single-finger score values were developed. These varied over a factor of more than 70 to one. The best scores were developed from images placed on very white, slick appearing, calendared card stock with the use of film strips that had been pre-inked and which could be separated to expose an ink film of predetermined thickness and uniformity. This combination had less resistance to smearing than fingerprints produced on the same stock from the use of a preinked porous pad. However, the latter still produced acceptably high scores.