The Indiana fingerprint comparison database

The Indiana Fingerprint Comparison Database is an open-source resource consisting of 513 image triplets of fingerprint images. Each triplet was assembled by a subject matter expert and consists of a latent impression, a mated exemplar livescan, and a non-mated exemplar livescan. The images have known ground truth and reflect many of the attributes of casework. A subset of 90 image triplets was tested in a black box study using 104 latent print examiners, and we provide response frequencies for each image pair using a 5-point response scale. We use an ordered probit model [1] to summarize the response distributions as a way of characterizing the strength of support for the same source proposition for each image pair and create likelihood ratios. The black box performance data and the freely-available images described here will support future research studies, laboratory training, validation, internal proficiency testing and calibration exercises.