DCT Based Robust Reversible Watermarking for Geometric Attack

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Provided by: International Journal of Emerging Trends & Technology in Computer Science (IJETTCS)
Topic: Security
Format: PDF
Reversible watermarking algorithms are used for military security applications such as sending and receiving important map of a region. Here, the authors represent reversible and roust watermarking technique based on DCT, which perfectly embeds the watermark in image and also extracts the original watermark successfully, though image is affected with geometric attacks such as scaling and translation. The proposed scheme embeds data by modifying those DCT coefficients with high frequency characteristics. The modifications are done in some of the high freq coefficients value accordingly with the watermarks embedding bit.
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