光学
鬼影成像
激光雷达
占空比
脉搏(音乐)
数字微镜装置
图像质量
噪音(视频)
脉冲宽度调制
材料科学
物理
信号(编程语言)
遥感
计算机科学
地质学
电压
图像(数学)
探测器
人工智能
量子力学
程序设计语言
作者
Huizu Lin,Wei-Tao Liu,Shuai Sun,Long-Kun Du
出处
期刊:Applied Optics
[Optica Publishing Group]
日期:2021-01-27
卷期号:60 (6): 1623-1623
被引量:11
摘要
A pulsed pseudo-thermal light source obtained using a rotating ground glass disk, spatial light modulator, or digital micromirror device is widely used in a ghost imaging (GI) lidar system. The property of the pulsed pseudothermal light field determines the reconstruction quality of the image in the GI lidar system, which depends on the pulse extinction ratio (PER) and pulse duty ratio. In this paper, pseudo-thermal light fields obtained at different pulse characteristics are given, taking into account the influence of the exposure time of the charge-coupled device (CCD) camera. The statistical distribution, contrast, and normalized intensity correlated function of the pseudo-thermal light field at different pulse characteristics are analyzed quantitatively for what we believe is the first time. Then, the peak signal-to-noise ratio of the reconstructed image using a GI algorithm and a differential ghost imaging (DGI) algorithm is numerically simulated. The simulation results demonstrate that the PSNR decreases as the PER decreases, which is affected by the pulse duty ratio and the CCD exposure time. The deterioration of the reconstruction quality can be reduced by using a DGI algorithm or by shorting the exposure time of the CCD in the GI lidar system.
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