Single-pixel correlation imaging for realizing high-quality reconstruction by using an iterative phase retrieval algorithm

Abstract

The invention relates to single-pixel correlation imaging for realizing high-quality reconstruction by using an iterative phase retrieval algorithm, which comprises the following steps of: 1) generating a series of intensity modes in advance on the basis of a Hadamard matrix, and decomposing each intensity mode into a pair of noisy phase contours by using the iterative phase retrieval algorithm; 2) performing collimation illumination on the laser beam, wherein two pure phase spatial light modulators are sequentially embedded into each pair of phase sections; wherein the free space propagationfield passing through the first pure phase plane is performed by using Fresnel diffraction, and the free space propagation field passing through the second pure phase plane is also similar; wherein the measured intensity is recorded by a barrel detector which is located behind the object and does not need spatial resolution; 3) correlating the recorded measurement intensity with a series of intensity modes generated and calculated by using the same cascade infrastructure, and 4) correlating the calculated reference intensity mode with the measured intensity, and decrypting the target by usinga correlation function.

Description

technical field [0001] The invention belongs to the technical field of image security, and relates to a single-pixel correlation imaging that uses an iterative phase retrieval algorithm to realize high-quality reconstruction. Background technique [0002] Single-pixel correlation imaging, also known as ghost imaging, is one of the most attractive optical techniques and has attracted increasing attention due to its remarkable physical properties. So far, applications based on single-pixel imaging have been extensively developed. With the development of optical information encryption technology, the application research of single-pixel imaging technology in this field has attracted more and more attention. Most importantly, a large number of new configurations and algorithms for single-pixel imaging have been explored, however, these algorithms require not only reduced measurement times and strict hardware constraints, but also improved robustness against noise and fast image...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a single-pixel correlation imaging using iterative phase retrieval algorithm to achieve high-quality reconstruction, which solves the need of prior art algorithms not only to reduce the number of measurements and strict hardware limitations, but also to improve the robustness against noise sexual problems

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