Abstract
A fragile watermarking algorithm for hologram authentication
is presented in this paper. In the proposed algorithm, the watermark is embedded
in the discrete cosine transform (DCT) domain of a hologram. The watermarked
hologram is stored in spatial domain with finite precision level. By enhancing
the precision for storing the watermarked hologram pixels, the distortion
produced by the proposed watermarking scheme can be lowered. While providing
high perceptual transparency, the proposed algorithm also attains high performance
detection to delivery errors and malicious tampering. Experimental results
reveal that the proposed algorithm can be used as an effective filter for
blocking polluted or tampered holograms from 3D magnitude and/or phase reconstruction.
© 2013 IEEE
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