Self-embedding Fragile Watermarking Scheme Based on Bicubic Prediction
To improve the quality of recovered images, a self-embedding fragile watermarking scheme is proposed based on the bicubic prediction. To take into account the PFA and the watermark payload, the 6-bit recovery data of a 2×2 block and the 8-bit key-based data of a 4×4 block are generated and inserted in the other 2×2 block and 4×4 block based on secret key, respectively. The validity of a 2×2 image block is determined by combining the recovery data with the key-based data. To improve the recovery quality, the recovery method based on bicubic prediction is designed to reconstruct the invalid blocks whose recovery watermark embedded in the other block is also destroyed. Simulation results demonstrate that the proposed scheme allows image recovery with an acceptable visual quality (PSNR ≈ 25 dB) up to 75％ tampering.
Fan Chen Hongjie He Hongxia Wang
Sichuan Key Labof Signal and Information Processing, Southwest Jiaotong University, Chengdu Information Securityand National Computing Grid Lab, Southwest Jiaotong University, Chengdu
国际会议
2011亚太信号与信息处理协会年度峰会(APSIPAASC 2011)
西安
英文
1-4
2011-10-18（万方平台首次上网日期，不代表论文的发表时间）