基于ICA的智能數(shù)字水印技術(shù)
Intelligent Digital Watermarking Technique Based on ICA
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摘要: 該文提出了一種基于智能信息分析方法--獨(dú)立分量分析的智能數(shù)字水印新算法。水印嵌入之前先對其進(jìn)行預(yù)處理，嵌入過程可以在圖像任意作用域中實(shí)現(xiàn)，并給出了小波域中的一種閉環(huán)嵌入方法。水印嵌入的強(qiáng)度由小波域視覺模型決定。在不需要任何原始圖像、水印和攻擊類型等信息的情況下，該算法不僅可以檢測到水印而且可以完全提取水印，實(shí)現(xiàn)了真正意義上的水印盲檢測，并對多個水印嵌入的情況也可以進(jìn)行水印提取。水印檢測的精確程度取決于圖像與水印之間的獨(dú)立性以及所采用的密鑰。實(shí)驗(yàn)過程中攻擊由通用水印測試軟件Stirmark產(chǎn)生，實(shí)驗(yàn)數(shù)據(jù)證明本文提出的水印算法對Stirmark提供的各種攻擊剪切、濾波、圖象壓縮、刪行、刪列、幾何攻擊以及多種攻擊同時存在時都具有很好的魯棒性。
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關(guān)鍵詞:
- 獨(dú)立分量分析; 智能數(shù)字水印技術(shù); Stirmark
Abstract: A new blind intelligent image watermarking technique proposed in this paper adopts intelligent information disposal-independent component analysis. The characteristics of the human visual system are incorporated into the watermark embedding and a closed-loop embedding in discrete wavelet transform domain is proposed. The watermark is rearranged by chaotic before embedded, and it can be detected and extracted correctly not merely be detected without any information about the original image, watermark and attack. It can also extract the multiple embedded watermarks. The accuracy of watermark extraction depends on the key and the statistical independence between the original images and watermark. Experimental results demonstrate that the proposed intelligent watermarking technique is robust with respect to traditional image processing including cropping, filtering, image compression and geometric distortions such as rotation, scaling. It even has a good robustness against combination of several attacks. All attacks are produced by popular watermark test software-Stirmark. -
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