| 引用本文: | 刘莉,周朴.基于分数傅立叶变换的图像隐藏技术.[J].国防科技大学学报,2005,27(6):67-71.[点击复制] |
| LIU Li,ZHOU Pu.The Application of Fractional Fourier Transform in Hiding Images[J].Journal of National University of Defense Technology,2005,27(6):67-71[点击复制] |
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| 基于分数傅立叶变换的图像隐藏技术 |
| 刘莉, 周朴 |
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(国防科技大学 光电科学与工程学院，湖南 长沙 410073)
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| 摘要: |
| 提出一种利用分数傅立叶变换实现图像隐藏的新方法。将多个不同图像的信息分别经不同阶的分数傅立叶变换后，记录在同一谱平面上，实现了图像的第一重隐藏。通过相位编码后，对谱平面进行另一次分数傅立叶变换，实现图像的第二重隐藏。在解密时，需要特定的分数阶及正确的解码相位才能再现不同的初始图像。提出的新方法用不同的分数阶实现多幅图频谱叠加的互不干扰，用相位编码使得两次的分数傅立叶变换互不干扰，随机设置多重密钥，且每重密钥都极其重要，使得破译的难度提高，因此图像加密的结果更加安全。 |
| 关键词: 分数傅立叶变换 分数阶 图像隐藏 |
| DOI： |
| 投稿日期：2005-09-30 |
| 基金项目:国家部委基金资助项目 |
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| The Application of Fractional Fourier Transform in Hiding Images |
| LIU Li, ZHOU Pu |
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(College of Opto-electronic Science and Engineering，National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| A new method of hiding images based on fractional Fourier transform (FRT) is presented. With this method, the FRT of several images with different fractional orders are recorded on one plate. And another fractional fourier transform accomplishes the hiding after adding the phase encoding. In order to reconstruct the encoded images, several FRT with certain orders and particular phase encoding are needed. That makes the encrypted images more difficult to decrypt even by an authorized person. |
| Keywords: fractional Fourier transform (FRT) fractional order hiding image |
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