Self-recovery Fragile Watermarking Scheme with Variable Watermark Payload
To take into account security, invisibility and recovery quality, this work proposes a variable-payload self-recovery fragile watermarking scheme. For each block, the watermarks include the total-watermark with variable number of bits and the basic-watermark of length 24 bits. The two watermark versions of each block are embedded into the less significant bit planes of the different blocks based on the secret key, respectively. They not only can partially resolve the coincidence tampering problem, but also improve the performance of tamper detection. The variable watermark payload preserves the adequate information of image block to as few bits as possible. Simulation results demonstrate that the proposed scheme not only provides a better invisibility and security against the known counterfeiting attacks, but also allows image recovery with an acceptable visual quality up to 60% tampering.
Keywordsfragile watermarking self-recovery variable watermark payload
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