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Single-channel color image encryption method based on chaos and phase retrieval process

A color image and phase recovery technology, applied in the field of virtual optical information encryption, can solve the problems of complex algorithm, slow convergence speed and low security.

Inactive Publication Date: 2014-03-26
XIAN UNIV OF TECH
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Problems solved by technology

[0006] The purpose of the present invention is to propose a single-channel color image encryption method based on chaos and phase recovery process to solve the problems of small key space, low security, slow convergence speed and complex algorithm in the prior art

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  • Single-channel color image encryption method based on chaos and phase retrieval process
  • Single-channel color image encryption method based on chaos and phase retrieval process
  • Single-channel color image encryption method based on chaos and phase retrieval process

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Embodiment Construction

[0037] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] The invention discloses a single-channel color image encryption method based on chaos and phase recovery process, including color image chaos scrambling and decomposition, pure phase extraction and modulation, and chaos diffusion.

[0039] Specific steps are as follows:

[0040] The first step: chaotic scrambling and decomposition of the color image, taking the color image "Baboon.jpg" as an example, first convert the three-dimensional M×N×3 pixel "Baboon.jpg" image into a two-dimensional 3M×N pixel grayscale image, and then use the chaotic sequence generated by the paired logistic mapping to scramble the grayscale image to obtain a scrambled 3M×N grayscale image, and decompose the scrambled 3M×N grayscale image into three M ×N variable image I i '(i=1,2,3).

[0041] In the second step, phase-only extraction and modulation, for the ...

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Abstract

A single-channel color image encryption method based on chaos and phase retrieval process comprises a color image chaos scrambling and decomposition step, a pure phase extraction and modulation step and a chaos diffusion step. Combining fractional Fourier transform and paired Logistic chaotic mapping, an encrypted image has nonlinearity and randomness, security and convergence speed of an encryption system are raised, and the problem of slow convergence speed existing in a present encryption method is solved. Meanwhile, complexity of the color image encryption system is reduced, the system is simple, and operation is convenient.

Description

technical field [0001] The invention belongs to the technical field of virtual optical information encryption, and relates to a single-channel color image encryption method based on chaos and phase recovery process. Background technique [0002] In recent years, as the problem of obtaining illegal data on the Internet has become increasingly serious, more and more researchers have turned their attention to image information security. Optical image encryption has become an important research area due to the high efficiency of optical transformations in parallel processing of 2D data. In the past two decades, researchers have proposed many image encryption algorithms based on various transform domains, such as fractional Fourier domain, Fresnel domain, and rotary transform domain. The main disadvantage of these methods is that the input image is illuminated with a single beam of light, so that the color information of the decrypted image is lost. Therefore, color image encry...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
Inventor 隋连升段快快陈涛芦海伟
Owner XIAN UNIV OF TECH
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