| 噪音对光学图象浑沌相位列阵加密和解密的影响 |
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| 引用本文： | 张培琨,刘家英.噪音对光学图象浑沌相位列阵加密和解密的影响[J].光子学报,1998,27(7):593-597. |
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| 作者姓名： | 张培琨 刘家英 |
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| 作者单位： | [1]中国科学院西安光学精密机械研究所光学室 [2]西安应用光学研究所 |
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| 摘 要： | 本文提出了一种用浑沌相位列阵对光学图象加密和解密的方法,并重点分析了加法高斯白噪音对光学图象浑沌相位列阵加密和解密的影响.通过计算机模拟发现加密后的图象与原图象相比,抗振幅噪音的能力增强,而抗相位噪音的能力下降.在一定信噪比范围内,相位噪音是影响解密图象质量的主要因素.
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| 关 键 词： | 光学图象 浑沌 相位列阵 图象加密及解密 加法白噪音 |
| 收稿时间： | 1998-01-08 |
THE INFLUENCE OF NOISE ON OPTICAL IMAGE ENCRYPTION & DECRYPTION USING CHAOTIC PHASE ARRAY |
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| Zhang Peikun, Li Yulin, Hu Manli, Qiao Xueguang.THE INFLUENCE OF NOISE ON OPTICAL IMAGE ENCRYPTION & DECRYPTION USING CHAOTIC PHASE ARRAY[J].Acta Photonica Sinica,1998,27(7):593-597. |
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| Authors: | Zhang Peikun Li Yulin Hu Manli Qiao Xueguang |
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| Institution: | 1. Xi’an Institute of Optics and Precision Mechanics, Academia Sinica, Xi’an 710068;2. Xi’an Applied Optics Institute, Xi’an 710065 |
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| Abstract: | In this paper,A novel optical encoding method for images encryption using chaotic phase array is proposed. The influence of the additive white noise on the image encryption and decryption is analyzed. The results for computer simulation show that the encrypted image have a higher noiseproof ability in amplitude noise and a lower noiseproof ability in phase noise than the original image. If the mean square signal-to-noise ration is larger than 17dB the phase noise becomes the main cause making decrypted image poorer in quality. |
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| Keywords: | Optical image Chaos Phase array Image encryption and decryption Additive white noise |
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