Iterative filter correlation imaging method
A technology of correlative imaging and iterative filtering, applied in the field of iterative filtering correlative imaging, can solve the problems of low imaging quality of correlative imaging, and achieve the effects of simple structure, increasing the number of iterations, and improving the signal-to-noise ratio.
Pending Publication Date: 2020-01-21
LIAONING UNIVERSITY
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[0003] One object of the present invention is to solve the low imaging quality problem of traditional correlation imaging and provide a high-quality correlation imaging method with iterative filtering
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[0033] An iterative filter correlation imaging method, the experimental device is:
[0034] 1) The light emitted by the light source (1) is divided into two spatially correlated beams by the non-polarizing beam splitter (2). One beam of light is reflected to the detection arm and is called the detection arm optical path, and the other beam is irradiated to the reference arm and is called the reference arm. light path;
[0035] 2) The optical path of the detection arm is provided with: an object to be imaged (3), an area array detection arm detector with spatial resolution capability (4-1), and a detection arm spatial filter (5-1). The detection arm detector (4-1) collects the light field intensity spatial distribution signal I(x 1 ), and output the signal to the detection arm spatial filter (5-1) for filtering operation; the detection arm spatial filter (5-1) filters the signal output to a coincidence measurement system (6) for reconstructing the object to be imaged;
[00...
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The invention relates to an iterative filter correlation imaging method, which respectively performs a series of filtering processing of specific thresholds on the data collected by two planar array detectors of a detection arm and a reference arm on the basis of filtering correlation imaging to obtain a filter intensity sequence, and performs iterative calculation on filtering intensity signals of different thresholds and their correlation according to the second-order correlation functions of traditional correlation imaging to realize the correlation imaging of the target object under test.The iterative filter correlation imaging method provided by the invention can realize super resolution imaging with the imaging resolution superior to the filtering correlation imaging, and compared with the traditional correlation imaging and filtering correlation imaging, has high resolution, high signal-to-noise ratio, high contrast, insensitive instability of light intensity, and the ability to resist the effect of bad weather such as atmospheric disturbances and turbulences. Meanwhile, the invention can be introduced into computational correlation imaging and compression correlation imaging systems to shorten the imaging time on the premise of ensuring high quality imaging, and can be widely used in the fields such as national defense, remote sensing, communication and biomedicine.
Description
technical field [0001] The invention relates to the field of high-quality correlative imaging, in particular to an iterative filtering correlative imaging method, which can realize super-resolution, high-contrast, and high-signal-to-noise ratio imaging. It can be widely used in national defense, military, remote sensing, communication, biomedicine and many other fields that require high-quality imaging technology. Background technique [0002] Correlation imaging technology is a kind of spatial intensity correlation property developed in recent years using thermal optical field or quantum optical field. This non-local correlation imaging technology has many advantages different from traditional lens imaging or photography technology: 1. It can be imaged without a lens and is suitable for any wavelength in the electromagnetic spectrum in principle; 2. It can be imaged under extremely harsh conditions , such as atmospheric turbulence, cloud occlusion, air turbidity and other ...
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Login to View More IPC IPC(8): G01S17/89
CPCG01S17/89
Inventor 陈希浩史伟伟孟少英付强鲍倩倩张颖刘月陶俊杰
Owner LIAONING UNIVERSITY