Figure 6
From: Optical cryptography with biometrics for multi-depth objects
Decrypted sectional images using the pinhole holograms measured at (a) z d1 = 30 cm and (b) z d2 = 35.5 cm for unprocessed decrypted images when the unity condition is not met for fingerprint images, and at (c) z d1 = 30 cm and (d) z d2 = 35.5 cm for processed decrypted images.
