Signature Verification

String Matching• To compute this alignment, dynamic time warping (DTW) isusedD(i,j)=⎧D(i −1,j −1)+ dE( i,j)⎪Min⎨D(i −1,j)+ Missing Penalty⎪⎩D(i,j-1)+ Spurious Penalty– D(i,j) is the optimal alignment up to point i of the first string and pointj of the second string– d e (i,j) is the Euclidian distance between points i and j• The overall dissimilarity for a signatureDist ( I , J ) =Norm2D(I , J )_ Factor ( N I, N J)