Enhanced Digital Watermarking Algorithm for Directionally Selective and Shift Invariant Analysis
Based on the good characteristics of dual-tree complex wavelet transform (DT-CWT), an improved digital watermarking algorithm is proposed here. The algorithm improves the embedding scheme by selecting the embedding channels and using the visual masking of Human Visual System. This also uses the spread spectrum in embedding scheme and Error correction code, in order to increase the robustness against common attacks different filtering attack etc., This algorithm increases the performance of watermark and has better robustness against common attacks.
Keywords: Spread spectrum, Error correction code
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