Related Experiment Video
Updated: Jun 25, 2026
10:14
Chromatographic Fingerprinting by Template Matching for Data Collected by Comprehensive Two-Dimensional Gas Chromatography
Published on: September 2, 2020
On the spatial distribution of fingerprint singularities
Raffaele Cappelli1, Davide Maltoni
1DEIS, Università di Bologna, Cesena, Italy. cappelli@cse.unibo.it
IEEE Transactions on Pattern Analysis and Machine Intelligence
|February 21, 2009
Summary
This study introduces the first statistical models for fingerprint singularity locations. These models accurately represent spatial distributions, improving fingerprint recognition and classification accuracy.
Area of Science:
- Biometrics
- Pattern Recognition
- Forensic Science
Background:
- Fingerprint singularities are crucial for recognition and classification.
- Existing knowledge on singularity location is limited to general constraints.
- Statistical models for singularity distribution were previously undeveloped.
Purpose of the Study:
- To develop the first statistical models for fingerprint singularity spatial distributions.
- To derive probability density functions for the four main fingerprint classes.
- To enhance fingerprint recognition and classification techniques.
Main Methods:
- Analysis of spatial distributions of fingerprint singularities.
- Derivation of probability density functions from a labeled dataset.
- Experimental validation on fingerprint classification and synthesis.
Main Results:
- Successfully derived probability density functions for major fingerprint classes.
- Demonstrated the utility of these models in improving classification accuracy.
- Validated the models' effectiveness in fingerprint synthesis.
Conclusions:
- The developed statistical models offer a novel approach to understanding fingerprint singularities.
- These models significantly enhance the accuracy of singularity-based biometric systems.
- The findings have direct applications in improving fingerprint recognition and synthesis technologies.
Related Concept Videos
01:03IR Frequency Region: Fingerprint Region
IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the C=O, C=N, and C=C occur between 1600–1850 cm−1.
The...
The...
01:16Second Uniqueness Theorem
Consider a region consisting of several individual conductors with a definite charge density in the region between these conductors. The second uniqueness theorem states that if the total charge on each conductor and the charge density in the in-between region are known, then the electric field can be uniquely determined.
In contrast, consider that the electric field is non-unique and apply Gauss's law in divergence form in the region between the conductors and the integral form to the surface...
In contrast, consider that the electric field is non-unique and apply Gauss's law in divergence form in the region between the conductors and the integral form to the surface...
01:02¹H NMR: Interpreting Distorted and Overlapping Signals
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are slanted or...
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are slanted or...
01:13¹H NMR Signal Multiplicity: Splitting Patterns
When protons A and X are coupled, their nuclear spin energy levels are slightly modified. This is because the energy required to excite proton A to a spin state parallel to proton X is slightly different from the energy required for it to become anti-parallel to spin X. Consequently, there are two possible excitation frequencies for A (A1 and A2), depending on the spin state of X, and vice versa. The mutual nature of coupling implies that the difference between frequencies A1 and A2, indicated...
01:27Distribution of Molecular Speeds
The motion of molecules in a gas is random in magnitude and direction for individual molecules, but a gas of many molecules has a predictable distribution of molecular speeds. This predictable distribution of molecular speeds is known as the Maxwell-Boltzmann distribution. The distribution of molecular speeds in liquids is comparable to that of gases but not identical and can help to understand the phenomenon of the boiling and vapor pressure of a liquid. Consider that a molecule requires a...