Image encryption and decryption methods and image encryption and decryption devices based on optical encryption and decryption technologies

An optical and image technology, applied in image data processing, image data processing, instruments, etc., can solve problems such as speckle noise interference and affect image clarity, and achieve the effect of preventing speckle noise interference and clear and complete images.

Active Publication Date: 2017-03-22
SHENZHEN UNIV
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Problems solved by technology

[0004] The present invention provides an image encryption and decryption method and device based on optical encryption and decryption technology, aiming to solve the problem that t

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  • Image encryption and decryption methods and image encryption and decryption devices based on optical encryption and decryption technologies
  • Image encryption and decryption methods and image encryption and decryption devices based on optical encryption and decryption technologies
  • Image encryption and decryption methods and image encryption and decryption devices based on optical encryption and decryption technologies

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Embodiment Construction

[0019] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described The 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 those skilled in the art without making creative efforts belong to the protection scope of the present invention.

[0020] see figure 1 , figure 1 Provide a schematic diagram of the implementation flow of an image encryption method based on optical encryption and decryption technology for the first embodiment of the present invention, which can be applied to optical encryption and decryption systems, figure 1 The image encryption method shown mainly incl...

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Abstract

The invention discloses image encryption and decryption methods and image encryption and decryption devices based on optical encryption and decryption technologies. The image encryption method comprises that an image to be encrypted is converted into a binary sequence code; according to a preset sequence conversion rule, the binary sequence code is converted into a decimal sequence code; according to the sequence from the head bit to the tail bit in the decimal sequence code, the decimal sequence code is divided into fragments, and the capacity of each fragment is set to be lower than or equivalent to the maximal capacity of a two-dimensional (2D) code; and the fragments are converted into 2D codes corresponding to the fragments, the 2D codes are encrypted optically, and the encrypted 2D codes are restored to the image to be encrypted via optical decryption. The 2D codes serves as carriers of the image, and are encrypted optically, the image restored via optical decryption is prevented from interference of spot noises, and the decrypted image is clearer and more complete.

Description

technical field [0001] The invention belongs to the technical field of optical encryption and decryption, in particular to an image encryption and decryption method and device based on optical encryption and decryption technology. Background technique [0002] Information encryption technology can protect electronic information during transmission and storage, and prevent it from being leaked to illegal users. Among them, optical encryption technology has the advantages of high parallelism, high speed and multiple encryption parameters, and is expected to occupy a place in the field of encryption technology in the future. For an image, common optical encryption techniques include: double random phase encryption (DRPE, Double Random Phase Encoding), double random phase encryption based on fractional Fourier transform (FFT, fractional Fouriertransform), wavelength multiplexing encryption and Asymmetric encryption based on phase truncation, etc. [0003] However, the optical ...

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Application Information

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IPC IPC(8): G06T1/00
CPCG06T1/0021
Inventor 邹文斌焦述铭庄兆永李霞
Owner SHENZHEN UNIV
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