| 优化的两步相移算法在图像加密中的应用研究 |
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| 引用本文： | 孟祥锋,彭翔,蔡履中,何文奇,秦琬,郭继平,李阿蒙. 优化的两步相移算法在图像加密中的应用研究[J]. 物理学报, 2010, 59(9): 6118-6124 |
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| 作者姓名： | 孟祥锋 彭翔 蔡履中 何文奇 秦琬 郭继平 李阿蒙 |
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| 作者单位： | (1)山东大学信息科学与工程学院光学工程系,济南 250100; (2)山东大学信息科学与工程学院光学工程系,济南 250100;深圳大学光电工程学院,光电子器件与系统教育部/广东省重点实验室,深圳 518060; (3)深圳大学光电工程学院,光电子器件与系统教育部/广东省重点实验室,深圳 518060 |
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| 基金项目： | 国家自然科学基金(批准号:60907005,60777008和60775021),中国博士后科学基金(批准号:200902334),深圳市科技计划项目(批准号:200734)和深圳市科技研发资金项目资助的课题. |
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| 摘 要： | 优化了此前提出的两步相移算法,仅通过两幅去除背景光强(或抑制直流分量)后的干涉图数据和一个(0,π)区间的相移值,就可以成功再现出原始物波场信息,无需借助于物光光强、参考光光强等其他辅助测量信息.与菲涅耳域的双随机相位编码技术结合,该优化算法可以应用于图像加密方案中,通过计算机仿真实验验证了所提方案的可行性,并对几何密钥的灵敏度进行了测试分析.
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| 关 键 词： | 信息光学 相移干涉术 图像加密 数字图像处理 |
| 收稿时间： | 2009-11-09 |
Optimized two-step phase-shifting algorithm applied to image encryption |
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| Meng Xiang-Feng,Peng Xiang,Cai Lü-Zhong,He Wen-Qi,Qin Wan,Guo Ji-Ping,Li A-Meng. Optimized two-step phase-shifting algorithm applied to image encryption[J]. Acta Physica Sinica, 2010, 59(9): 6118-6124 |
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| Authors: | Meng Xiang-Feng Peng Xiang Cai Lü-Zhong He Wen-Qi Qin Wan Guo Ji-Ping Li A-Meng |
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| Affiliation: | Department of Optics, School of Information Science and Engineering, Shandong University, Jinan 250100, China;College of Optoelectronics Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, She;College of Optoelectronics Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China;Department of Optics, School of Information Science and Engineering, Shandong University, Jinan 250100, China;College of Optoelectronics Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China;College of Optoelectronics Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China;College of Optoelectronics Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China;College of Optoelectronics Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China |
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| Abstract: | The two-step phase-shifting algorithm proposed previously is optimized, the original object wave field can be reconstructed by only one phase shift value in (0, π) and two interferograms, with the removal (or suppression) of background intensity (or dc term), and the additional measurements such as the object wave intensity, reference wave intensity, etc., are no longer required. Together with double random phase encoding technique in the Fresnel domain, the optimized two-step phase-shifting algorithm is then applied to image encryption system. The feasibility of the proposed scheme is verified by computer simulation. Furthermore, the sensitivity of geometrical keys has also been tested and analyzed. |
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| Keywords: | information optics phase-shifting interferometry image encryption digital image processing |
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