METHOD AND SYSTEM FOR THE ANALYSIS OF SINGULARITIES IN DIGITAL SIGNALS

摘要

The proposed method comprises predetermining for each point of the print a setting which includes the first neighbours and calculating a reconstructibility measurement, or peculiarity measurement, for each point of the print, by considering the contributions of said local setting of the print. The value of the print at each point is inferred from the values of the print at the local setting points by using a reconstruction formula. The peculiarity measurement includes the difference between the value of the print at the point and the estimated value for the local setting. A logarithmic transformation is performed on said peculiarity measurement with a view to obtaining an independent measurement of the range of the sampled fingerprint and which varies in a controlled way under resolution changes. The method also proposes a system with means for obtaining for each point said peculiarity measurement and for carrying out the abovementioned logarithmic transformation and other calculations