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Multi-image encryption device based on computer generated hologram and multi-image encryption algorithm thereof

A technology of computing holography and encryption devices, which is applied in the field of information transmission, can solve the problems of complex optical path, high hardware requirements, and susceptibility to interference, and achieve the effect of simple optical path, high transmission, and good robustness

Inactive Publication Date: 2017-12-08
张艳雪
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Compared with the former two, computational holography is different from quantum encryption. Although it has strong confidentiality, it is limited by the distance in the current research situation, and it is also different from optical encryption. Although it has the advantages of parallel processing data and large information characteristics, but it has high requirements for experimental hardware, and the optical path is complex and susceptible to interference

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  • Multi-image encryption device based on computer generated hologram and multi-image encryption algorithm thereof
  • Multi-image encryption device based on computer generated hologram and multi-image encryption algorithm thereof
  • Multi-image encryption device based on computer generated hologram and multi-image encryption algorithm thereof

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Embodiment Construction

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.

[0025] see figure 1 , the present invention provides a technical solution: a multi-image encryption device based on computational holography, the encryption device includes an input signal plane, a first random phase plate RPM1, a second random phase plate RPM2 and an output signal plane, and from the left to the right ∑, ∑ 1 , ∑ 2 represent the input surface, transformation surface and output surface, respectively; where the input signal is f(x,y); the outp...

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Abstract

The invention discloses a multi-image encryption device based on a computer generated hologram and a multi-image encryption algorithm thereof. The multi-image encryption device comprises an input signal surface, a first random phase plate, a second random phase plate and an output signal surface which represent an input surface, transformation surfaces and an output surface from the left to the right. The image can be clearly displayed under the condition of ensuring information security, and the optical path is simple without transformation lens. Wavelet transformation and Fresnel double random phase encryption are used so that the design system is enabled to have high parallelism and transmission performance. Double encryption of the Arnold transformation scrambling mode is used so that the image decoding difficulty can be greatly increased and storage and transmission of the encrypted hologram are facilitated. The experiment verifies and proves that the method has great robustness and has great encryption effect.

Description

technical field [0001] The invention relates to the technical field of information transmission, in particular to a multi-image encryption device and algorithm based on computational holography. Background technique [0002] Computational holography is based on modern optics and digital computing. Using computer codes to make holograms can record the phase and amplitude of light waves. It does not require the actual existence of objects. It only needs to input the mathematical description of object light waves into the computer for corresponding processing. Coding, that is, the required hologram can be generated. This characteristic of computational holography has good applications in the synthesis of spatial filtering in information processing, the generation of special reference wavefronts in interferometry, and the display of three-dimensional virtual objects. It overcomes the limitations of experimental equipment in the current optical encryption and decryption process, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T9/00
CPCG06T9/00
Inventor 张艳雪
Owner 张艳雪
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