Color image encoding in dual fractional Fourier-wavelet domain with random phases

Color image encoding in dual fractional Fourier-wavelet domain with random phases
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具有随机相位的双分数傅里叶小波域中的彩色图像编码

DOI:
10.1016/j.optcom.2009.05.044
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发表时间:
2009-09
影响因子:
2.4
通讯作者:
Linfei Chen
Linfei Chen
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Daomu Zhao;Linfei Chen

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本文提出了一种新的分数傅立叶-小波双重域密码体制,该体制通过离散分数傅立叶变换和小波分解计算。在加密过程中,不同的小波子带采用不同的随机相位。提出了一种新的彩色图像编码方法,分别采用基本颜色分解和加密技术。在解密过程中,必须正确使用所有的密钥,包括R、G、B三个通道中的随机相位和分数阶,否则就不能得到完全正确的信息。数值模拟结果表明了该方法的可行性。它在数字彩色图像处理和保护中有着广泛的应用前景。
A new cryptology in dual fractional Fourier-wavelet domain is proposed in this paper, which is calculated by discrete fractional Fourier transform and wavelet decomposition. Different random phases are used in different wavelet subbands in encryption. A new color image encoding method is also presented with basic color decomposition and encryption respectively. All the keys, including random phases and fractional orders in R, G and B three channels, should be correctly used in decryption, otherwise people cannot obtain the totally correct information. Some numerical simulations are presented to demonstrate the possibility of the method. It would have widely potential applications in digital color image processing and protection.
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