Image Watermarking Resisting to Geometrical Attacks Based on Histogram
IIH-MSP '06 Proceedings of the 2006 International Conference on Intelligent Information Hiding and Multimedia
A New Histogram Based Image Watermarking Scheme Resisting Geometric Attacks
IAS '09 Proceedings of the 2009 Fifth International Conference on Information Assurance and Security - Volume 01
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Nowadays there exist many kinds of robust image watermark algorithms. However, most of them are invalid even when the carrier suffers from slight geometric attacks. To address the problem, an anti-geometric attack digital watermark algorithm based on the statistical characters of image histogram is proposed. The fault-tolerant channel is introduced to weaken or eliminate the interference caused by geometric distortion to the image when the watermark is embedded. To do this, the algorithm compares and adjusts image pixel distribution in the fixed grayscale intervals dynamically. Experiments show that our algorithm has low computational cost, good invisibility and perfect robustness in against rotating, translating, scaling and common noise attacks. Meanwhile the embedded watermark can be easily and exactly fetched.