Adaptive heterogeneous variable-resolution ghost imaging method and system

Abstract

The invention discloses an adaptive heterogeneous variable-resolution ghost imaging method and system, and belongs to the technical field of optical imaging. The implementation method comprises the following steps: performing image processing according to the first ghost imaging result; utilizing priori knowledge, detecting a circular area where the target object is located through image processing; determining the position of the circle center of the circular area to generate non-uniform speckles with adjustable resolution corresponding to the position and the size; projecting the non-uniformspeckle to a target to carry out secondary imaging on the target. The generation of non-uniform speckles is realized by carrying out region division, recombination and pixel filling of a random matrix on classical speckles under polar coordinates. That is to say, the position of the high-resolution center point is adaptively adjusted according to actual situation requirements, high-resolution speckle imaging is performed on the induction area, low-resolution speckle imaging is performed on the non-induction area, the data volume is reduced, and the ghost imaging efficiency is further improved. The invention also discloses an adaptive heterogeneous variable-resolution ghost imaging system for realizing the method.

Description

technical field [0001] The invention belongs to the technical field of optical imaging, in particular to an adaptive heterogeneous variable resolution ghost imaging method and system. Background technique [0002] Ghost imaging is a new imaging technology that utilizes the correlation characteristics of light field intensity to restore the information of the scene to be tested. Different from the direct imaging of traditional area array detectors, ghost imaging only uses single-point detectors without spatial resolution, and can reconstruct the target scene information by correlating the fluctuations of the light field and the changes of the total light intensity of the echo. Due to its advantages of high detection efficiency, low noise, low cost, and simple structure, ghost imaging shows great application prospects in the fields of space remote sensing, optical encrypted transmission, and medical imaging. [0003] This method is a system in which the target is imaged indir...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of slow imaging speed caused by small objects of interest in a large field of view and fixed resolution that cannot be adjusted in the practical application of traditional ghost imaging, an adaptive heterogeneous variable resolution ghost imaging disclosed in the present invention The technical problem to be solved by the method and system is: perform image processing according to the first ghost imaging results, use prior knowledge, detect the circular area where the target object is located through image processing, and generate the position and size by determining the position of the center of the circular area Corresponding non-uniform speckle with adjustable resolution, project the non-uniform speckle to the target for secondary imaging, by dividing the classic speckle in polar coordinates, reorganizing and filling the pixels of the random matrix The generation of non-uniform speckle, that is, adaptively adjust the position of the high-resolution center point according to the actual situation, perform high-resolution speckle imaging on the sensing area area, and perform low-resolution speckle imaging on the non-sensing area area, reducing the data volume, thereby improving ghost imaging efficiency

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