基于矩陣LU分解的數(shù)字水印算法
Digital Watermarking Algorithm Based on LU Decomposition
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摘要: 該文提出了一種新的基于矩陣LU分解的數(shù)字水印算法。該方法首先將數(shù)字圖像的非負(fù)矩陣表示轉(zhuǎn)化為G-對角占優(yōu)矩陣，再進(jìn)行LU分解，通過量化函數(shù)進(jìn)行數(shù)字水印的嵌入，恢復(fù)水印時不需要原始圖像。將矩陣的LU分解數(shù)字水印算法與DCT的中頻系數(shù)比較法進(jìn)行了對比實驗。實驗結(jié)果表明這種方法運算速度快并且具有很好的魯棒性。
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關(guān)鍵詞:
- 信息隱藏; 數(shù)字水印; LU分解
Abstract: In this paper, a new digital watermarking algorithm based on LU decomposition of matrix is proposed. In order to apply LU decomposition, the corresponding nonnegative matrix of the image is transformed into G-diagonally dominant matrix. In the course of embedding digital watermarking, the scale quantization function is used. The original image is not needed in the recover progress. Experiments are given for contrasting the LU algorithm with DCT mid-frequency coefficient comparison method, and results show that this new-algorithm is robust and easy to embed and extract. -
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