Fig. 1

The simulated latent fingerprint (a) is composed by adding the fingerprint (c) to image (b) which is a detail from a photo of a printed document. DG3PD decomposition of a obtains a smooth cartoon image u (d) and a smooth and sparse texture image v (e). All positive coefficients of v are visualized as white pixels in f. The region of interest shown in g is estimated from v_bin using morphological operations [57]. Image i is composed from b and h and decomposed by DG3PD into cartoon (j), texture (k), and residual (l)