METHOD AND SYSTEM FOR THE ANALYSIS OF PECULIARITIES IN FINGERPRINTS

摘要

The proposed method comprises determining for each point of the signal an environment comprising the first neighbours and calculating for each point of the signal a reconstructibility measurement, or singularity measurement, weighting the contributions of said local environment of the point. The value of the signal at each point is inferred from the values of the signal at the points of the local environment using a reconstruction formula. The singularity measurement includes the difference between the value of the signal at the point and the value estimated by its local environment. A logarithmic transformation is carried out on said singularity measurement with a view to obtaining an independent measurement of the amplitude of the sampled digital signal that varies in a controlled manner under changes in resolution. A system is proposed with means for obtaining said singularity measurement for each point and for carrying out the abovementioned logarithmic transformation and other calculations.