一种条纹管多光谱激光三维成像系统的仿真算法
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摘要
条纹管激光三维成像因其高精度、大视场和高帧频等技术优点,成为最有希望实现实用化的激光成像体制之一。通过研究基于多狭缝条纹管的多光谱成像技术,提出了一种多狭缝条纹管多光谱成像的仿真算法。给出了主要系统结构参数的推导过程。分析了不同探测器像素数对系统成像的时间分辨率和空间分辨率的影响。在仿真的系统结构模型中,利用光纤阵列将多个波段的激光回波信号同时送入同一个条纹管的光电阴极。针对探测器像素数为64×64和128×128的情况进行了仿真成像实验,最终实验结果验证了算法的可行性。
The streak tube laser three-dimensional imaging system is one of the most promising practical laser imaging systems, because of its high precision, large field of view and high frame frequency. A multispectral imaging simulation algorithm for multi-slit streak tube is proposed based on the research of the multi-spectral imaging. The derivation of the main structural parameters is given. The influence of the number of different detectors on the time resolution and spatial resolution of the system is analyzed. In the model of the simulation system, the laser echo signals of multiple wavelength bands are fed into the photocathode of the same streak tube at the same time by the fiber array. The simulation experiments are carried out for the cases of 64×64 and 128×128 pixels. The experimental results verify the feasibility of the algorithm.
The streak tube laser three-dimensional imaging system is one of the most promising practical laser imaging systems, because of its high precision, large field of view and high frame frequency. A multispectral imaging simulation algorithm for multi-slit streak tube is proposed based on the research of the multi-spectral imaging. The derivation of the main structural parameters is given. The influence of the number of different detectors on the time resolution and spatial resolution of the system is analyzed. In the model of the simulation system, the laser echo signals of multiple wavelength bands are fed into the photocathode of the same streak tube at the same time by the fiber array. The simulation experiments are carried out for the cases of 64×64 and 128×128 pixels. The experimental results verify the feasibility of the algorithm.
引文
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[12]邓江洪,赵领.基于小波变换的激光雷达图像融合研究[J].激光杂志,2015,36(12):31-34.Deng Jianghong,Zhao Ling.Laser Radar Image Fusion Based on Wavelet Transforms[J].Laser Journal,2015,.36(12):31-34.
[2]Osofsky,Samuel T.Characterization of a vertical blurring effect unique to streak tube imaging lidar[C].Proceedings of SPIE 4488,2002:1-7.
[3]魏靖松.条纹管激光雷达成像技术研究[D].哈尔滨:哈尔滨工业大学,2013.Wei Jingsong.Imaging technology of streak tube lidar[D].Harbin:Harbin Institute of Technology,2013.
[4]B C Redman,A J Griffis,E B Schibley.Streak Tube Imaging Lidar(stil)for 3D Imaging of Terrestria Targets[R].2000.
[5]Brian Redman.Real-time Obstacle Detection Using a Streak Tube Imaging Lidar(STIL)[R].Final Report for Contract M67004,1999.
[6]张宇,赵远,吴晓敏,等.多光谱探测与激光多光谱探测技术的进展[J].激光技术,2007,31(2):188-191.Zhang Yu,Zhao Yuan,Wu Xiaomin,et al.Advancement on multi-spectum detecting and laser multi-spectum detecting technology[J].Laser Technology,2007,31(2):188-191.
[7]许洪,王向军.多光谱、超光谱成像技术在军事上的应用[J].红外与激光工程,2007,36(1):13-17.Xu Hong,Wang Xiangjun.Applications of multispectral/hyperspectral imaging technologies in military[J].Infrared and Laser Engineering.2007,36(1):13-17.
[8]操乐林,武春风,侯晴宇,等.基于光谱成像的目标识别技术综述[J].光学技术,2010,36(1):145-150.Cao Yuelin,Wu Chunfeng,Hou Qingyu,et al.Survey of target recognition technology based on spectrum imaging[J].Optical Technique 2010,36(1):145-150.
[9]Richmond R D.Direct-Detection LADAR Systems[M].SPIE Press,2010.
[10]赵宝升,陈敏.采用多狭缝条纹管实现激光三维成像[J].光子学报,2004,33(12):1426-1427.Zhao Baosheng,Chen Min.The Application of ms-streak tube in three-dimensional lidar system[J].Aca Photonica Sinica,2004,33(12):1426-1427.
[11]朱梦宇,杨裕亮,贾晓岚.基于小波变换和模糊数学的图像融合算法研究[J].系统仿真学报,2008,20(增1):375-380.Zhu Mengyu,Yang Yuliang,Jia Xiaolan.The Image Fusion Algorithm Based on Wavelet Transform and Fuzzy Math[J].Journal of System Simulation 2008,20(S1):375-380.
[12]邓江洪,赵领.基于小波变换的激光雷达图像融合研究[J].激光杂志,2015,36(12):31-34.Deng Jianghong,Zhao Ling.Laser Radar Image Fusion Based on Wavelet Transforms[J].Laser Journal,2015,.36(12):31-34.