A Semi-fragile Image Watermarking Resisting to JPEG Compression
Semi-fragile watermark has attracted attention due to its important role in content authentication for multimedia. In order to distinguish malicious tampering from incidental attacks, semi-fragile watermark must be robust against content-protection image processing. Due to the widely use of JPEG compression, it is always an important subject of semi-fragile watermarking research to improve the performance of anti-JPEG compression under the condition of maintaining high tempering detection abilities. In this paper, after wavelet high frequency coefficients LH2 and HL2 are partitioned into coefficient blocks respectively, the energy of each coefficient block is computed. Watermark information is embedded according to the relative coefficient energy relationships. The experimental results show that the proposed algorithm has the advantages such as the objective and subjective image quality assurance, high performance of anti-JPEG compression, larger amount of embedded information, and exact location of malicious attacks.
semi-fragile watermark JPEG energy relations high frequency coefficient
Xiangqing Wang Jun Wang Hong Peng
School of Electrical Information Engineering Xihua University Chengdu, 610039 China School of Mathematics and Computer Engineering Xihua University Chengdu, 610039 China
国际会议
南昌
英文
498-502
2009-09-01（万方平台首次上网日期，不代表论文的发表时间）