Zhe Zhang

Optical Color Zero-Watermarking via Phase-Shifting Digital Holography Coupled with High-Robustness Bimodal Biometric Keys

In this paper, an optical color zero-watermarking scheme based on robust bimodal biometric keys and phase-shifting digital holography is proposed. The color watermark is first encrypted into three amplitude ciphertexts through an optical encryption framework combining grating modulation, Fresnel-domain double random ph...