Image encryption method and device, equipment and storage medium

An image, to-be-encrypted technology, applied in image communication, electrical components, etc., can solve problems such as low algorithm efficiency

Inactive Publication Date: 2019-03-22
GUANGDONG UNIV OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method, device, equipment and computer-readable storage medium for image encryption to solve the problem of low algorithm efficiency caused by the inclusion of a large number of floating points when using a high-dimensional chaotic system to encrypt images in the prior art The problem

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  • Image encryption method and device, equipment and storage medium
  • Image encryption method and device, equipment and storage medium
  • Image encryption method and device, equipment and storage medium

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Embodiment Construction

[0040] The core of the present invention is to provide an image encryption method, device, equipment and computer-readable storage medium, which improves the efficiency of image encryption.

[0041] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0042] Please refer to figure 1 , figure 1 The flow chart of the first specific embodiment of the method for image encryption provided by the present invention; the specific operation steps are as follows:

[0043] Ste...

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Abstract

The invention discloses an image encryption method and device, equipment and a computer readable storage medium. The method comprises the steps of after converting an original image to be encrypted into an M*N two-dimensional array H, inputting the M*N two-dimensional array H into a pre-selected chaos system of which an initial key and an initial parameter are set; performing L-stage wavelet decomposition on the original image, to acquire low-frequency sub-band coefficients and high-frequency sub-band coefficients in multiple different wavelet sub-band coefficients; scrambling the low-frequency sub-band coefficients by using the pre-selected chaos system; performing L-layer wavelet inverse transformation on the scrambled low-frequency sub-band coefficients and the high-frequency sub-band coefficients, to acquire a reconstructed image with the size of M*N; and performing image diffusion on the reconstructed image to acquire a target encrypted image of the original image. According to the method, device, equipment and computer readable storage medium provided by the invention, the encryption efficiency can be improved when the high-dimensional chaos system is used for encrypting theimage.

Description

technical field [0001] The present invention relates to the technical field of encryption, in particular to an image encryption method, device, equipment and computer-readable storage medium. Background technique [0002] With the rapid development of digital multimedia applications and the increase in the use of multimedia images, the security of digital information transmission is very important, because the transmission of digital images is necessary in many applications, such as Internet communications, multimedia systems, medical imaging, telemedicine , military communications, large-scale petrochemical and other industries. [0003] In the past few decades, chaotic systems have been more and more used in systems such as secure communication and image encryption because of their pseudo-randomness and high sensitivity to initial values, which are consistent with the characteristics of encryption systems. With the improvement of computing power, the encryption scheme usi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/32
CPCH04N1/32272H04N1/3217
Inventor 谢国波吴震禹
Owner GUANGDONG UNIV OF TECH
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