双光束叠加与差异模的光学图像加密算法

发布时间：2018-04-10 02:29

本文选题：光学图像加密　切入点：双光束相干叠加　出处：《包装工程》2017年23期

【摘要】：目的为了解决当前基于干涉原理的光学图像加密算法因存在轮廓显现导致其安全性不高的问题,提出双光束相干叠加与差异模矢量分解的图像加密算法。方法基于Gyrator变换,将明文变成一个Gyrator频域的复杂函数;随后引入矢量分解方法,将Gyrator频域复杂函数进行差异分解,输出幅度与相位不均等的2个矢量成分;利用2个相位掩码对矢量成分进行调制,将其从频域变为空域,将其相位部分视为私密,而幅度部分视为最终加密密文。结果实验显示,与当前基于模均等分解的图像加密技术相比,所提算法具有更高的保密性与敏感性,有效消除了轮廓显现问题。结论所提算法能够确保图像信息在网络中的安全传输,有效抵御外部攻击,在包装印刷与防伪二维码等领域具有一定的应用价值。
[Abstract]:In order to solve the problem that the security of optical image encryption algorithm based on interference principle is not high due to the appearance of contour, an image encryption algorithm based on coherent superposition of two beams and differential mode vector decomposition is proposed.Methods based on the Gyrator transform, the plaintext is transformed into a complex function in Gyrator frequency domain, and then the vector decomposition method is introduced to decompose the complex function in Gyrator frequency domain to produce two vector components whose amplitude and phase are not equal.Two phase masks are used to modulate the vector components from frequency domain to spatial domain. The phase part is considered private and the amplitude part is regarded as the final encrypted ciphertext.Results the experimental results show that the proposed algorithm has a higher confidentiality and sensitivity than the current image encryption technology based on modular equalization decomposition and effectively eliminates the problem of contour representation.Conclusion the proposed algorithm can ensure the safe transmission of image information in the network, effectively resist external attacks, and has certain application value in packaging printing and anti-counterfeiting QR code and so on.
【作者单位】：常州机电职业技术学院;南京航空航天大学;
【基金】：江苏省高校自然科学研究项目(15KJD520005)
【分类号】：TP309.7;TP391.41

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