35,574 research outputs found
Gender Determination using Fingerprint Features
Several previous studies have investigated the gender difference of the fingerprint features. However, regarding to the statistical significance of such differences, inconsistent results have been obtained. To resolve this problem and to develop a method for gender determination, this work proposes and tests three fingertip features for gender determination. Fingerprints were obtained from 115 normal healthy adults comprised of 57 male and 58 female volunteers. All persons were born in Taiwan and were of Han nationality. The age range was18-35 years. The features of this study are ridge count, ridge density, and finger size, all three of which can easily be determined by counting and calculation. Experimental results show that the tested ridge density features alone are not very effective for gender determination. However, the proposed ridge count and finger size features of left little fingers are useful, achieving a classification accuracy of 75% (P-valu
A Multi-Scale Approach to Directional Field Estimation
This paper proposes a robust method for directional field estimation from fingerprint images that combines estimates at multiple scales. The method is able to provide accurate estimates in scratchy regions, while at the same time maintaining correct estimates around singular points. Compared to other methods, the penalty for detecting false singular points is much smaller, because this does not deteriorate the directional field estimate
Metrics for measuring distances in configuration spaces
In order to characterize molecular structures we introduce configurational
fingerprint vectors which are counterparts of quantities used experimentally to
identify structures. The Euclidean distance between the configurational
fingerprint vectors satisfies the properties of a metric and can therefore
safely be used to measure dissimilarities between configurations in the high
dimensional configuration space. We show that these metrics correlate well with
the RMSD between two configurations if this RMSD is obtained from a global
minimization over all translations, rotations and permutations of atomic
indices. We introduce a Monte Carlo approach to obtain this global minimum of
the RMSD between configurations
- ā¦