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Noiseless recovery method based on qr code for double random phase multi-image parallel encryption

A technology of double random phase and recovery method, applied in the field of optical encryption, can solve the problems that affect the application effect, cannot be completely eliminated, multi-image encryption crosstalk noise, etc.

Inactive Publication Date: 2021-05-25
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the system still has problems such as crosstalk noise of multi-image encryption, which affects the actual application effect
Although researchers have also proposed many noise reduction methods, in general, crosstalk noise can only be suppressed to a certain extent, but cannot be completely eliminated.

Method used

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  • Noiseless recovery method based on qr code for double random phase multi-image parallel encryption
  • Noiseless recovery method based on qr code for double random phase multi-image parallel encryption
  • Noiseless recovery method based on qr code for double random phase multi-image parallel encryption

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings, and a specific embodiment of the present invention will be described.

[0045] In this example, 4 grayscale images (32×32 pixels) are used as the original input image, such as image 3 (a)-(d), encryption and decryption are performed through a QR code-based double random phase multi-image parallel encryption and decryption system.

[0046] The entire encryption and decryption process can be implemented as follows:

[0047] (1) Read out the binary data of 4 grayscale images directly, and concatenate them into 4 very long binary number sequences; convert the 4 binary number sequences into 4 decimal integer sequences according to the aforementioned rules; use QR code to generate The device will convert the converted decimal integer sequence to generate 4 corresponding QR codes, such as Figure 4 shown.

[0048] (2) Input the generated 4 QR codes as figure 1 The double r...

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Abstract

The invention proposes a double random phase multi-image parallel encryption noiseless recovery method based on a quick response code (QR code), which belongs to the field of optical encryption. Due to the interactive superposition of multi-image information in the traditional double random phase multi-image parallel encryption method, there is a serious crosstalk noise problem in the decrypted image, which seriously affects the decryption effect. Some existing methods for noise reduction can only suppress crosstalk noise to a certain extent, but cannot completely remove it. The principle structure of the present invention is the same as that of the traditional double random phase multi-image parallel encryption system, the difference is that the QR code is used as a data container, and the anti-noise ability of the QR code can effectively eliminate the problem of crosstalk noise, and make the system have better robustness.

Description

technical field [0001] The invention belongs to the field of optical encryption. Background technique [0002] After Refregier and Javidi proposed the dual random phase encoding (DRPE) technique in 1995, many schemes using different optical techniques have emerged. In recent years, multi-image encryption technology has been paid more and more attention because it can improve the efficiency of information transmission. A lot of research has been done on various multi-image encryption schemes based on the DRPE system, but the most basic dual-random-phase multi-image parallel encryption system is simple in structure, easy to implement, and capable of parallel encryption of multiple images at the same time. Higher information transmission efficiency, so it is still an important form of optical multi-image encryption. [0003] figure 1 and figure 2 They are schematic diagrams of traditional double random phase multi-image parallel encryption and decryption system. During en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/60
CPCG06F21/602
Inventor 周昕李怀东霍东明
Owner SICHUAN UNIV
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