HIGH PRECISION ON-LINE DYNAMIC SIGNATURE VERIFICATION SYSTEM

摘要

A method for on-line handwritten data verification based on the comparison of the dynamics of sample (31 or 32) and reference data (21 or 22) by implementation of correlation function analysis. Reference dynamic data concerning scriber (11) movement during data formation is recorded and converted to digital form (13). Prior to evaluation to-be-verified data, both the reference and to-be-verified data dynamic digital signals are pre-processed to eliminate time distortions. A "sliding window" mechanism is used to establish the mapping between phase coincident regions of the reference and of the to-be-verified signals. Then multi-dimensional cross-correlation function analysis is applied to the pair of indivisible stationary signals. The resulting measures of similarity an then compared with thresholds that have beta selected to determine acceptance or rejection of the to-be-verified signals. The method and the apparatus can be applied to data authentication in a wide variety of applications like security for physical mess, for credit card authentication, electronic voting, and the like.