The Open Automation and Control Systems Journal

2015, 7 : 2215-2222
Published online 2015 November 3. DOI: 10.2174/1874444301507012215
Publisher ID: TOAUTOCJ-7-2215

A Contourlet-Based Image Watermarking Resisting to JPEG Compression

Junpeng Zhang , Huaijing Qu and Hongjuan Yang
Shandong Jianzhu University, School of Information & Electrical Engineering, Fengming Road, Lingang Development Zone, Jinan, P.R. China, 250101.

ABSTRACT

A novel image authentication algorithm resisting to JPEG compression is proposed. The authentication watermark is generated based on the stability of relationship of adjacent Contourlet transform coefficients before and after JPEG. According to the random block mapping, the watermark is embedded into the discrete cosine transform (DCT) coefficients of other image blocks. The tampering identification matrix is determined by the difference between extracted watermark and reconstructed watermark, and adjacent region comparison is adopted to determine the authenticity of image blocks. Experimental results show that the algorithm can not only achieve blind detection with better resistance to JPEG compression, but also is able to position malicious tampering more accurately.

Keywords:

Contourlet transform, Image authentication, JPEG compression, Tampering detection.