连续场景太赫兹数字全息三维重建图像的参数影响  

Influence of Parameters on Terahertz Digital Holography 3D Image Reconstruction of a Continuous Scene

作　　者：林平 李琦[1] 申作春[1] Lin Ping;Li Qi;Shen Zuochun(National Key Laboratory of Science and Technology on Tunable Laser,Harbin Institute of Technology,Harbin,Heilongjiang 150080,China)

机构地区：[1]哈尔滨工业大学可调谐激光技术国家级重点实验室,黑龙江哈尔滨150080

出　　处：《激光与光电子学进展》2020年第22期41-49,共9页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61377110)。

摘　　要：采用压缩感知太赫兹数字全息技术进行连续场景的三维重建,其中,影响重建结果的控制参数主要有迭代次数和稀疏限制参数。首先,仿真重建了三个层面的连续场景与分立场景全息图,并进行了对比分析。其次,改变迭代次数,给出重建结果随稀疏限制参数的变化曲线,找到本次实验的最佳控制参数。仿真结果表明,当重建平面数目为4,迭代次数为300次,稀疏限制参数为不大于0.02时,重建图像的质量较好。Compressed sensing terahertz digital holography technology is utilized to reconstruct three-dimensional images of a continuous scene.The control parameters affecting the reconstruction results primarily include the numbers of iterations and the sparse limit parameter.First,the holograms of a continuous scene and a discrete scene on three dimensions were reconstructed,simulated and compared.Then,the number of iterations was changed,and the reconstruction results varying with sparse limit parameters was used to find the best control parameters.Simulation results show that the reconstructed image quality is optimal when the number of reconstruction planes is 4,number of iterations is 300,and sparse restriction parameter is not greater than 0.02.

关 键 词：成像系统 太赫兹三维成像技术 压缩感知 连续型场景 控制参数 

分 类 号：TN249[电子电信—物理电子学]