| 一种感兴趣区域二维水印算法的实现 |
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| 引用本文： | 李成,毕笃彦.一种感兴趣区域二维水印算法的实现[J].计算机应用与软件,2007,24(11):210-211,214. |
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| 作者姓名： | 李成 毕笃彦 |
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| 作者单位： | 空军工程大学工程学院信号与信息处理实验室,陕西,西安,710038 |
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| 摘 要： | 针对图像中用户选定的感兴趣区域ROI(Regions of interest)的保护,提出形状自适应离散小波变换SA-DWT(Shape Adaptive DWT)是实现感兴趣区域二维水印算法的有效工具.水印图像(一幅灰度图像)经压缩后生成可以嵌入的水印序列,同时SA-DWT变换作用于ROI区域,通过选择变换系数的嵌入位置和嵌入准则实现水印信息的嵌入;最后提取水印信号,通过重构恢复水印图像.攻击实验表明该算法可以抵抗常见的图像攻击手段,ROI区域得到了有效保护.
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| 关 键 词： | 形状自适应离散小波变换 感兴趣区域 二维水印算法 感兴趣区域 水印算法 INTEREST REGIONS ALGORITHM 有效保护 攻击手段 抵抗 实验 恢复 水印信号 提取 的嵌入 水印信息 准则 嵌入位置 变换系数 选择 变换作用 序列 |
| 修稿时间： | 2006-08-31 |
A 2-DIMENSION WATERMARKING ALGORITHM FOR REGIONS OF INTEREST |
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| Li Cheng,Bi Duyan.A 2-DIMENSION WATERMARKING ALGORITHM FOR REGIONS OF INTEREST[J].Computer Applications and Software,2007,24(11):210-211,214. |
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| Authors: | Li Cheng Bi Duyan |
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| Abstract: | Aiming at protecting regions of interest(ROI)selected by users in the image,a 2-dimension watermarking algorithm based on the shape adaptive DWT(SA-DWT)is proposed.The watermark(a gray image)is compressed to create the watermarking sequence,and the SA-DWT is applied to the ROI.Then the embedding position and embedding rule are chosen for SA-DWT coefficients and the embedding of watermarking information is realized.Finally,the extraction of the watermarking sequence and the restoration of the watermarking image are carried out.Experimental results show that this scheme is robust to common signal processing procedures,and the selected ROI do receive better protection. |
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| Keywords: | Shape adaptive DWT Regions of interest Two-dimension watermarking alglrithm |
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