| 基于标量衍射理论的图像解密三维信息构造方法 |
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| 作者姓名： | 傅长明 杨玉花 李拓 陈岳东 程栋 王雅丽 史祎诗 |
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| 作者单位： | 1. 中国科学院研究生院, 北京 100049;2. 北京工业大学应用数理学院, 北京 100124;3. 中国科学院研究生院信息安全国家重点实验室, 北京 100049 |
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| 基金项目： | 国家自然科学基金(60970004);中国科学院优博论文启动基金;中国科学院研究生院院长基金和香港王宽诚教育基金资助 |
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| 摘 要： | 提出合理设置相位延迟以提高光学三维信息解密质量的方法. 利用多个垂直于同一光轴的二维函数,分别以离轴和同轴的形式构造简单三维信息. 采取基于相位抽取的光学三维信息加密算法进行模拟,验证了同轴构造三维信息解密质量受噪声干扰较大,且噪声的产生与加密过程中的相位抽取无关. 通过考察信息相位分布和相位延迟对解密质量的影响,证明合理设置相位延迟可降低解密噪声. 设计2种相位延迟设置方案,分析相应的约束条件.
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| 关 键 词： | 信息安全 光学加密 三维信息构造 相位延迟 |
| 收稿时间： | 2011-12-05 |
| 修稿时间： | 2012-01-14 |
Construction method of three-dimensional information for image decryption based on the scalar diffraction theory |
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| Authors: | FU Chang-Ming YANG Yu-Hua LI Tuo CHEN Yue-Dong CHENG Dong WANG Ya-Li SHI Yi-Shi |
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| Institution: | 1. Graduate University, Chinese Academy of Sciences, Beijing 100049, China;2. College of Applied Science, Beijing University of Technology, Beijing 100124, China;3. State Key Laboratory of Information Security, Graduate University, Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Construction method of three-dimensional (3D) information with judicious choices of phase retardation is proposed to improve the decryption quality. The simple 3D information can be constructed with multiple two-dimensional distribution functions perpendicular to the axis, in both the cases of off-line and in-line. Optical 3D information encryption is performed based on phase extraction algorithm. Computer simulations show that the decryption quality declines in the in-line constructions compared with that in the off-line ones. Schemes for the phase retardation setting are provided with the analysis of respective constraint conditions. |
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| Keywords: | information security optical encryption construction of three-dimensional information phase retardation |
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