Adaptive Fourier calculation correlated imaging method and system

Abstract

The invention provides an adaptive Fourier calculation correlated imaging method and system, and the method comprises the steps: S1, generating a first Fourier-based pattern according to a pre-sampling template to irradiate an imaging target, and carrying out the calculation according to a collected light intensity signal of the imaging target, so as to obtain a rough two-dimensional spectrum energy distribution diagram of a target image; s2, calculating the sampling probability of the rough two-dimensional spectrum energy distribution diagram of the target image by using a sampling probability density function, and generating a self-adaptive sampling path according to the calculated sampling probability; and S3, generating a second Fourier-based pattern according to the adaptive sampling path to irradiate the imaging target and calculate to obtain a spectrum coefficient corresponding to a sampling point, and processing the obtained spectrum coefficient by using a compressed sensing algorithm to obtain a reconstructed target image. The method solves the technical problem that the imaging quality is reduced due to the fact that a relatively fixed sampling path is adopted in an existing method to obtain too little key information of an image frequency spectrum under the same sampling number.

Description

technical field [0001] The invention belongs to the technical field of optical imaging, and in particular relates to an adaptive Fourier calculation correlation imaging method and system. Background technique [0002] As one of the research frontiers in the field of computational imaging, computational correlation imaging is a method that uses spatial light modulation technology to encode the object scene, and then decodes the signal obtained by a single-pixel detector that does not have spatial resolution capabilities by calculation A new imaging technology that restores the object scene. Compared with the traditional optical imaging technology that uses CCD, CMOS and other array detectors, computational correlation imaging helps to solve imaging problems in non-visible light band imaging, weak light imaging, anti-turbulence imaging, etc. problems and has broad application prospects. [0003] Fourier Computational Correlation Imaging is a Computational Correlation Imaging ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention proposes a technical scheme of adaptive Fourier calculation correlation imaging to solve the problem of ignoring the diversity of the frequency spectrum distribution of the target image in the existing method, and adopting a relatively fixed sampling path leads to the same sampling quantity The technical problem that the key information of the image spectrum is too little to reduce the imaging quality

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