摘要
近年来频谱重建的单像素成像技术的独特性质得到人们的普遍关注,它不仅提出一种新的成像方式,而且揭示了物体空域信息与频域信息的逆傅里叶变换关系,为了在实验教学中研究这个问题,本文在理论和实验上研究了单像素彩色成像问题。首先,分析了单像素成像的物理基础:频谱重构;接着,考虑了环境电磁辐射、探测器位置和探测器有限面积等因素后,建立了单像素探测辐射度量公式;然后,依据三步相移法导出了频谱重建公式,提出单像素彩色成像的三种实现方案,并比较了它们的优点和缺点;最后在实验上建立了彩色单像素成像装置,并采用分色照明结合分时探测的方法,实现了单像素彩色成像。本研究在物理实验教学上展示了一种新的成像原理:频谱重构结合逆傅里叶变换成像;在技术上提供了实现单像素彩色成像的一种低成本实验方案,让学生在成像过程中实时理解物体空域信息与频域信息的对应关系,并定量研究不同频谱范围对成像质量、不同探测器位置对成像效果的影响。
In recent years,the unique properties of single-pixel imaging technology of spectrum reconstruction have been widely concerned.It not only proposes a new imaging method,but also reveals the inverse Fourier transform relationship between spatial information and frequency domain information of objects.In order to study this problem in experimental teaching,this paper studies single-pixel color imaging in theory and experiment.Firstly,spectrum reconstruction which is the physical basis of single-pixel imaging is analyzed.Secondly,the radiation measurement formula of single-pixel detection is established after considering the environmental electromagnetic radiation,detector location and detector limited area.Thirdly,the spectrum reconstruction formula is derived according to the three-step phase-shifting method.Three implementation schemes of single-pixel color imaging are proposed,and their advantages and disadvantages are compared.Finally,a color single pixel imaging device is established in the experiment,and the color separation illumination combined with time-sharing detection method is used to realize the single pixel color imaging.This research shows a new imaging principle in physics experiment teaching:spectrum reconstruction combined with inverse Fourier transform imaging,and provides a low-cost experimental scheme to realize single pixel color imaging in technology.In the imaging process,students can understand the corresponding relationship between spatial information and frequency information of objects in real time,and quantitatively study the influence of different spectrum ranges on imaging quality and different detectors as well as the influence of the position of the camera on the imaging effect.
作者
陈奕鸿
崔佳琪
杨初平
CHEN Yihong;CUI Jiaqi;YANG Chuping(Department of Physics,South China Agricultural University,Guangdong,Guangzhou 510642)
出处
《物理与工程》
2021年第4期89-94,共6页
Physics and Engineering
基金
华南农业大学质量工程项目(zlgc16032)。
关键词
计算成像
频谱重建
单像素探测
彩色成像
computational imaging
spectrum reconstruction
single pixel detection
color imaging
