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Method for hiding multiple images in QR code based on compressed sensing and orthogonal modulation

A quadrature modulation and compressed sensing technology, applied in the field of optical image hiding and encryption, it can solve the problems of limited DMD arrangement pattern, achieve the effect of wide application potential, reduce the amount of calculation, and increase the flexibility

Inactive Publication Date: 2018-04-20
SICHUAN UNIV
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

This system is a passive imaging system, which has some limitations. The resolution of the reconstructed image is set by the measurement matrix. However, due to the limited arrangement mode of DMD, it can only reconstruct images with limited resolution.

Method used

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  • Method for hiding multiple images in QR code based on compressed sensing and orthogonal modulation
  • Method for hiding multiple images in QR code based on compressed sensing and orthogonal modulation
  • Method for hiding multiple images in QR code based on compressed sensing and orthogonal modulation

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Embodiment Construction

[0045] 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.

[0046] The model of the liquid crystal projector used in this example is EPSON CB-S03, the model of the data collector is 7IDA3, the photoelectric detector uses a silicon photocell as the probe, the preamplifier and active filter circuit are self-made, and the software such as system control is compiled with Python . Such as Figure 4 The block image shown contains four square objects with hollow patterns. The photodetector is placed on the back focal plane of the lens, and four blocks of the object are collected and restored separately. Each block image is processed with a resolution of 64*64 reconstruction.

[0047] The total measurement value of 4 block images is obtained through compressed sensing and orthogonal modulation. Four hollow-out objects are placed behind the first lens in turn. A l...

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Abstract

The invention discloses a method for hiding multiple images in a QR code based on compressed sensing and orthogonal modulation, and belongs to the field of optical image hiding and encryption. According to the method disclosed by the invention, a total measurement value expressed by decimal numerals of multiple images is obtained by using the compressed sensing and orthogonal modulation technologyand is stored in the form of the QR code; during decoding, the QR code is scanned by using a mobile phone or other photoelectric devices to obtain the total measurement value again, and then block reconstruction of the whole image or the partial reconstruction in the multiple images is achieved according to the needs. From an optical encryption point of view, the compressed sensing and orthogonalmodulation process of the invention can also be considered as two security levels, which must be completely correct at two levels to obtain the reconstructed images, and thus having good encryption performance.

Description

technical field [0001] The invention belongs to the field of optical image hiding and encryption, in particular to an image hiding method based on a QR code. Background technique [0002] With the development of the information age, information processing capabilities and security have become more and more important. How to deal with massive data and how to prevent data from being obtained by unauthorized users are issues that modern society needs to pay attention to. Therefore, various compression technologies and Optical encryption technology has received extensive attention. QR code, that is, Quick Response Code (Quickresponse code), is a matrix two-dimensional barcode researched and developed by Denso Corporation of Japan in September 1994. It has been widely used in real-time data processing and optical encryption and other fields. Thanks to the widespread popularity of smart phones, QR codes gradually have broader application prospects in the fields of manufacturing, ...

Claims

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Application Information

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IPC IPC(8): H04N1/32
CPCH04N1/32149H04N1/32272
Inventor 周昕周媛媛张罗致
Owner SICHUAN UNIV
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