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Single-pixel imaging method based on atmospheric scattering medium modulation

A technology of atmospheric scattering and imaging methods, applied in the field of optical imaging, to achieve the effect of improving optical imaging capabilities

Active Publication Date: 2020-06-30
NAT SPACE SCI CENT CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

To sum up, there is no effective solution to the problem of long-distance optical imaging in time-varying scattering media

Method used

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  • Single-pixel imaging method based on atmospheric scattering medium modulation
  • Single-pixel imaging method based on atmospheric scattering medium modulation
  • Single-pixel imaging method based on atmospheric scattering medium modulation

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Embodiment Construction

[0046] The implementation process of the present invention is given below in conjunction with the accompanying drawings to describe the technical solution of the present invention in detail.

[0047] 1. Basic concepts

[0048] The typical optical path of single-pixel imaging is as follows: figure 1shown. The light emitted by the light source reaches the digital micromirror device (DMD) after being expanded by the lens. The DMD is composed of an independently programmable microlens array. Each microlens can be flipped in two directions to perform binary modulation. By loading the random 0 / 1 measurement matrix on the DMD, the binary random modulation of the incident light field can be realized. The modulated light from a reflection direction of the DMD reaches the target through the lens, and after being transmitted by the target, it is collected and detected by the barrel detector through the lens, and an element value of the detection value y can be obtained.

[0049] The m...

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Abstract

The invention discloses a single-pixel imaging method based on atmospheric scattering medium modulation, and the method comprises the steps: enabling a laser beam to enter an atmospheric scattering medium, taking the atmospheric scattering medium as a spatial modulator, and calculating a single modulation pattern of the atmospheric scattering medium under a current condition; in the modulation mode, enabling light in the atmospheric reflection direction to reach a target through the lens, and enabling the barrel detector to collect all light signals from the target to obtain a detection value;randomly changing the transmission direction of the laser beam entering the atmosphere to obtain a series of different modulation patterns of the atmosphere for light field modulation; taking the single modulation pattern as a row vector, and forming an atmospheric scattering medium measurement matrix by row vectors corresponding to a series of different modulation patterns; obtaining a measurement vector composed of a series of detection values corresponding to a series of different modulation patterns; and recovering the target signal by using an image reconstruction algorithm. According tothe method, an atmospheric scattering medium is used as a spatial modulator for single-pixel imaging, and clear imaging of a target surrounded by the scattering medium is realized.

Description

technical field [0001] The invention relates to the field of optical imaging, in particular to a single-pixel imaging method based on atmospheric scattering medium modulation. Background technique [0002] Optical imaging has played an important role in the fields of earth observation and automatic driving, and scattering media brings challenges to optical imaging. The scattering medium changes the transmission direction of the light wave, causing intensity attenuation, and at the same time changes the spatial distribution of the light field, resulting in the inability to clearly image the target through the scattering medium. In recent years, the technical indicators of optical cameras have been continuously improved, with higher spatial resolution, better modulation transfer function, and smaller weight / size. However, the existence of scattering media seriously reduces the image quality acquired by the camera and limits the optical quality. The detection capability of the...

Claims

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Application Information

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IPC IPC(8): G01S17/89
CPCG01S17/89
Inventor 马晓珊雷雪林杨震彭晓东
Owner NAT SPACE SCI CENT CAS
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