Influence of laser speckle average size on ghost imaging

被引:0
作者
Kong, Qing-Nan [1 ]
Wang, Shan-De [1 ]
Zhang, Chi [1 ]
Qin, Wei-Ping [1 ]
机构
[1] State Key Laboratory on Integrated Optoelectronics, College of Electronic Science & Engineering, Jilin University, Changchun
来源
Guangxue Jingmi Gongcheng/Optics and Precision Engineering | 2015年 / 23卷
关键词
Correlation imaging; Ghost imaging; Laser speckle; Speckle size; Two-arm symmetry;
D O I
10.3788/OPE.20152313.0197
中图分类号
学科分类号
摘要
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. © 2015, Chinese Academy of Sciences. All right reserved.
引用
收藏
页码:197 / 203
页数:6
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