Influence of laser speckle average size on ghost imaging

KONG Qing-nan; WANG Shan-de; ZHANG Chi; QIN Wei-ping

doi:10.3788/OPE.20152313.0197

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Influence of laser speckle average size on ghost imaging

更新时间：2020-08-13

- Influence of laser speckle average size on ghost imaging
- Optics and Precision Engineering Vol. 23, Issue 10z, Pages: 198-204(2015)
- 作者机构：
  
  吉林大学电子科学与工程学院集成光电子学国家重点联合实验室,吉林长春,130012
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152313.0197
  CLC： O436.1;TP391.4
- Received：15 June 2015，
  
  Revised：30 June 2015，
  
  Published：14 November 2015
- 稿件说明：
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孔庆楠, 王善德, 张驰等. 激光散斑平均尺寸对关联成像重构的影响[J]. 光学精密工程, 2015,23(10z): 198-204

KONG Qing-nan, WANG Shan-de, ZHANG Chi etc. Influence of laser speckle average size on ghost imaging[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 198-204
孔庆楠, 王善德, 张驰等. 激光散斑平均尺寸对关联成像重构的影响[J]. 光学精密工程, 2015,23(10z): 198-204 DOI： 10.3788/OPE.20152313.0197.

KONG Qing-nan, WANG Shan-de, ZHANG Chi etc. Influence of laser speckle average size on ghost imaging[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 198-204 DOI： 10.3788/OPE.20152313.0197.

摘要

研究了散斑平均尺寸对赝热光关联成像的影响。分别采用1幅二值图和1幅多灰度图作为待重构目标物体的图像

以峰值信噪比(PSNR)作为衡量指标

对重构质量进行了量化

同时从小到大选取3组不同尺寸散斑重构的图像进行了直观的对比。通过仿真实现了传统关联成像(GI)、差分关联成像(DGI)、基于压缩感知的关联成像(CGI)和基于伪逆的关联成像(PGI)4种关联成像方案。使用尺寸从小到大的多组散斑场分别对每一种方案进行重构。仿真结果表明

随着散斑平均尺寸的增大

GI、DGI和PGI重构图像的PSNR都有显著的提高

最高可达到7 dB;而CGI重构图像的PSNR没有明显的提高。此外

当实验中的物臂和参考臂不完全对称时

双臂的散斑平均尺寸会有一定的偏差。4种方案重构图像的PSNR都随着偏差的增大有不同程度的下降

直至图像无法辨认。在保证重构图像可辨认的条件下

GI和DGI容许的偏差较大

CGI次之

PGI最小。

Abstract

The influence of speckle average size on the ghost imaging with pseudo-thermal light was investigated. A binary image and a grayscale image were used as images of an object to be reconstructed. The reconstruction quality was quantified by Peak Signal to Noise Ratio (PSNR) as the measure

while three sets of reconstructed pictures with different size speckles from small to large were compared intuitively. Four correlation imaging methods including Ghost Imaging (GI)

Differential Ghost Imaging (DGI)

Compressive-sensing Ghost Imaging (CGI) and Pseudo-inverse Ghost Imaging (PGI) were simulated. Then

several groups of speckle fields with a growing size were used to reconstruct respectively by these methods. The simulation result shows that the PSNRs of GI

DGI and PGI are improved to 7 dB remarkable as the speckle size increasing

while the PSNR of the CGI enhances little. Besides

when the object arm and reference arm are not quite symmetrical in the experiment

the speckle size of two arms are deviated slightly. The reconstruction PSNRs of four methods are decreased as the bias increasing and indistinguishable finally. For a distinguishable reconstruction

the allowable deviations of GI and DGI could be bigger than that of the CGI

in which the PGI is the smallest.

关键词

Keywords

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Influence of two-arm symmetry on reconstructed image of compressive sensing for ghost imaging

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State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University

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