| 一种基于分数余弦变换的数字图像水印算法 |
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| 引用本文： | 张永亮,常保平,曾以成.一种基于分数余弦变换的数字图像水印算法[J].湘潭大学自然科学学报,2005,27(3):41-46. |
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| 作者姓名： | 张永亮 常保平 曾以成 |
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| 作者单位： | 1. 湘潭大学材料与光电物理学院,湖南,湘潭,411105
2. 安阳师范学院网络管理中心,河南,安阳,455002 |
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| 基金项目： | 湖南省自然科学基金资助项目(04JJ40047)，湖南省教育厅资助项目(03C467) |
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| 摘 要： | 提出了一种基于分数余弦变换的数字图像水印算法.将原始图像分块并利用人类视觉系统的掩蔽效应将图像块分类,选择变换域中幅值较大的系数自适应地修正嵌入强度,以嵌入二值水印图像.实验结粜表明该算法能有效地保持图像的质量,并且对常见的图像处理如噪声叠加、JPFG压缩、均值滤波、图像缩放和图像裁剪等比余弦变换域中修改低频系数的水印算法具有更强的鲁棒性.
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| 关 键 词： | 数字水印 分数余弦变换 |
| 文章编号： | 10005-900（2005）03-0041-06 |
| 收稿时间： | 2005-02-08 |
| 修稿时间： | 2005年2月8日 |
A New Digital Image Watermarking Algorithm Based on Fractional Cosine Transform |
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| ZHANG Yong-liang,CHANG Bao-ping,ZENG Yi-cheng.A New Digital Image Watermarking Algorithm Based on Fractional Cosine Transform[J].Natural Science Journal of Xiangtan University,2005,27(3):41-46. |
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| Authors: | ZHANG Yong-liang CHANG Bao-ping ZENG Yi-cheng |
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| Institution: | 1.Faculty of Material Seience and Photoelectronic Physics,Xiangtan University,Xiangtan 411105 China;2.Network Center,Anyang Teachers College,Anyang 455002 China |
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| Abstract: | A new digital image watermarking algorithm based on fractional cosine transform is proposed in this paper. The algorithm splits the original image into blocks and classifies these blocks based on visual masking. A binary image watermarking signal is designed and encrypted by a sequence cipher before it is embedded. Then watermarks component with self - adaptive strength are embedded into high amplitude coefficients of the fractional cosine transformation of original image. The experimental results show that the proposed scheme works really well. The embedded watermark is more robust against various image processing operations such as noise adding, JPEG compression, filtering, scaling, cropping etc, in comparison with which embedded into low - frequency coefficients of DCT domain. |
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| Keywords: | Digital watermark Fractional Cosine Transform |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
