A Novel Semi-Fragile Watermarking Algorithm with Tamper Localization and Self-Recovery

Concerning the shortage of the tamper recovery performance in the existing semi-fragile watermarking algorithm, the authors proposed a precise two-watermarking algorithm. The algorithm uses the authentication watermarking for image authentication and tamper location; the recovery watermark is tampered image reconstruction. The simulation results show that the proposed algorithm has precise tamper localization, and can effectively recover the tampered content.