Centrality of the Fingerprint Core Location

Laurenz Ruzicka (Autor, Keynote), Bernhard Strobl, Bernhard Kohn, Clemens Heitzinger

Research output: Chapter in Book or Conference ProceedingsConference Proceedings with Oral Presentationpeer-review


Fingerprints have long been recognized as a unique and reliable means of personal identification. Central to the analysis and enhancement of fingerprints is the concept of the fingerprint core. Although the location of the core is used in many applications, to the best of our knowledge, this study is the first to investigate the empirical distribution of the core over a large, combined dataset of rolled, as well as plain fingerprint recordings. We identify and investigate the extent of incomplete rolling during the rolled fingerprint acquisition and investigate the centrality of the core. After correcting for the incomplete rolling, we find that the core deviates from the fingerprint center by 5.7% $\pm$ 5.2% to 7.6% $\pm$ 6.9%, depending on the finger. Additionally, we find that the assumption of normal distribution of the core position of plain fingerprint recordings cannot be rejected, but for rolled ones it can. Therefore, we use a multi-step process to find the distribution of the rolled fingerprint recordings. The process consists of an Anderson-Darling normality test, the Bayesian Information Criterion to reduce the number of possible candidate distributions and finally a Generalized Monte Carlo goodness-of-fit procedure to find the best fitting distribution. We find the non-central Fischer distribution best describes the cores' horizontal positions. Finally, we investigate the correlation between mean core position offset and the NFIQ 2 score and find that the NFIQ 2 prefers rolled fingerprint recordings where the core sits slightly below the fingerprint center.
Original languageEnglish
Title of host publicationBIOSIGNALS 2024 Conference Proceedings
Subtitle of host publicationProceedings of the 17th International Joint Conference on Biomedical Engineering Systems and Technologies
Publication statusPublished - 23 Feb 2024
Event17th International Joint Conference on Biomedical Engineering Systems and Technologies - BIOSIGNALS - Rome, Rome, Italy
Duration: 21 Feb 202423 Feb 2024


Conference17th International Joint Conference on Biomedical Engineering Systems and Technologies - BIOSIGNALS

Research Field

  • Computer Vision


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