A large field of view hidden extraction method and system for stacked diffraction imaging

Abstract

The invention relates to a method and a system for concealing and extracting a large field of view for stacked diffraction imaging. The concealment method includes: building a reflective stacked imaging system; the reflective stacked imaging system includes a spatial light modulator and a charge-coupled device; encoding the mask image and the original image, generating a plurality of visual key images, and recording Each of the visual key images is divided into a plurality of divided visual key images; the plurality of divided visual key images are sequentially loaded into the spatial light modulator according to the acquisition sequence of the stacked imaging images At different pixel positions, and while loading each of the segmented visual key images, use the charge-coupled device to collect the diffraction pattern corresponding to the segmented visual key image; scrambling the diffraction pattern , to generate a scrambled hidden image; the scrambled hidden image is an image that hides the original image. The present invention can realize real-time encoding and real-time concealment.

Description

technical field [0001] The invention relates to the field of information security, in particular to a method and a system for concealing and extracting a large field of view for stacked diffraction imaging. Background technique [0002] With the explosive development of information, people have higher and higher requirements for the safe storage, safe transmission and safe processing of information. Therefore, information security has become one of the major global issues, which is related to politics, economy, military, various aspects of life. However, the seriality of digital information processing leads to its slow speed and low efficiency, which cannot meet people's growing demands for information security. [0003] With the continuous progress of traditional digital information security research, modern optical theory and technology are gradually integrated into it. In 1995, researchers first proposed a double random phase encoding optical image encryption technology...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a large field of view hidden extraction method and system for stacked diffraction imaging to solve the problem of poor real-time performance caused by real-time encoding and real-time hiding

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