摘要
本文对太赫兹光场数据采集与数字重聚焦成像进行实验研究。太赫兹成像因其穿透性、无损性等优点,近年来备受国内外研究者关注。太赫兹波段的光场成像技术有望增强图像质量、改善应用效果。本文在分析光场成像基本原理、系统结构、重建方法的基础上,应用太赫兹焦平面阵列相机进行太赫兹光场数据采集和数字重聚焦实验。首先采集太赫兹光场原始数据,然后通过数字重聚焦进行计算成像,最后对重构图像做增强处理,得到了深度、角度及目标物轮廓分辨力强的太赫兹图像。实验证明了太赫兹光场成像技术的可行性及其改善图像质量、丰富复现效果的能力。
In recent years,terahertz imaging has attracted great attention due to its advantages including penetrability and nondestructive property.The field imaging technology within the terahertz range is expected to enhance the terahertz image quality and improve its application effect.In this paper,an experiment on the data acquisition and digital refocusing of the terahertz light field was conducted.Firstly,the basic principle,system structure,and the method of reconstructing light field imaging were analyzed.Secondly,the terahertz focal plane array camera was used to collect the data about light field and digital refocusing was used to get the computed imaging.Finally,the reconstructed image was enhanced to obtain higher depth resolution,angle resolution,and object contour resolution.Experimental results showed the feasibility and ability of terahertz light field imaging to improve image quality and enrich retrieval effects.
作者
杨墨轩
赵源萌
左剑
吕南方
张存林
Yang Moxuan;Zhao Yuanmeng;Zuo Jian;Lv Nanfang;Zhang Cunlin(Key Laboratory of Terahertz Optoelectronics,Ministry of Education,Beijing Key Laboratory for Terahertz Spectroscopy and Imaging,Beijing Advanced Innovation Center for Imaging Theory and Technology,Department of Physics,Capital Normal University,Beijing 100048,China)
出处
《光电工程》
CAS
CSCD
北大核心
2020年第5期117-122,共6页
Opto-Electronic Engineering
基金
首都师范大学研究生学院“2020年内涵发展跨学科学术建设基金”资助。
关键词
太赫兹
光场采集
数字重聚焦
图像重构
terahertz
light field acquisition
digital refocusing
image reconstruction
作者简介
杨墨轩(1999-),男,主要从事图像处理,光场成像方向的研究。E-mail:yang.ymx@qq.com;通信作者:赵源萌(1981-),男,博士,讲师,主要从事光电成像、太赫兹成像、图像处理的研究。E-mail:zhao.yuanmeng@cnu.edu.cn。
