Cancelable PalmCode Generated from Randomized Gabor Filters for Palmprint Template Protection

Security and protection of biometric template has been the bottleneck of its applications due to permanent appearance of biometric features. Coding approaches for palmprint recognition have much superiority over other approaches. Unfortunately, most of the existing biometric protection schemes are performed only in subspace approaches. Cancelable PalmCode is a novel scheme for palmprint template protection based on texture features. The texture features of cancelable PalmCode were generated from Gabor filters whose parameters are randomized by the user-specific tokenised pseudo-random number (PRN). The different effects of various randomized parameters were studied and discussed in this paper. Three among the seven possible combinations of parameter randomization were proved to be able to avoid the performance degradation caused by PRN and selected as the feasible schemes for cancelable PalmCode. Cancelable PalmCode can be revoked and reissued conveniently and the transform is non-invertible. The experimental results on PolyU palmprint database show that both PRN and biometrics play equally significant roles in cancelable PalmCode and it can be easily generalized to other palmprint texture codes