Algorithm for Fingerprint Enhancement Based on Contourlet Transform

In this paper we presents a method of processing in transform space for fingerprint enhancement.The algorithm performs Contourlet transform on fingerprint image then disposes the transformed coefficients by estimating the standard deviation of noises.Coefficients associated to edge is preserved while coefficients associated to noises is restrained.So enhanced fingerprint is obtained when transforming these changed coefficients back to spatial domain.The experiment results prove that proposed algorithm is responsible.