快照式光谱成像技术发展趋势分析与展望(特邀)  

Development Trends and Prospects of Snapshot Spectral Imaging Technology (Invited)

作　　者：袁艳[1,2] 刘安琪[1,2] 苏丽娟 YUAN Yan;LIU Anqi;SU Lijuan(School of Instrumentation and Optoelectronic Engineering,Beihang University,Beijing 100191,China;Key Laboratory of Precision Opto-Mechatronics Technology,Ministry of Education,Beijing 100191,China)

机构地区：[1]北京航空航天大学仪器科学与光电工程学院,北京100191 [2]精密光机电一体化技术教育部重点实验室,北京100191

出　　处：《光子学报》2022年第7期90-106,共17页Acta Photonica Sinica

基　　金：国家自然科学基金重点项目(No.61635002)。

摘　　要：快照式光谱成像技术可以单次曝光成像获得目标辐射的二维空间分布和一维光谱信息,在动态目标探测与识别中具有显著优势。本文总结了快照式光谱成像技术的空谱调制投影原理,并从丰富探测信息量的角度出发,在技术原理和数据处理两个层面分析了其主要发展趋势。在技术原理层面,扩展目标辐射探测维度,实现多维信息实时探测是光学探测技术发展的重要趋势,重点介绍了快照式光谱立体成像技术;在数据处理层面,提高光谱图像空间分辨率,对于提升快照式光谱成像技术的应用效果具有重要的实际意义。在此基础上,对快照式光谱成像技术的未来发展方向进行了展望。Snapshot spectral imaging technology can obtain the target’s two-dimensional(2D) spatial information and one-dimensional(1D)spectral information within a single exposure. Compared with the scanning spectral imaging technology,it reduces the requirement on the stability of the platform and can capture the temporal-spatial-spectral datacube of dynamic targets. Therefore,it has broad application prospects in biological imaging,medical diagnosis,food production monitoring,dangerous substance leakage warning,and dynamic target monitoring. This paper summarizes the data acquisition schemes of typical snapshot spectral imaging techniques,which are categorized into direct and indirect measurement.The direct measurement transfers the multidimensional radiation to the grayscale response directly and builds the one-to-one correspondence between the datacube voxels and detector pixels. Therefore,the number of datacube voxels should be less than the number of detector pixels. The indirect measurement modulates the multidimensional radiation and measures the coupled spatial-spectral information. The datacube voxels have to be calculated based on the indirect measurements. The number of datacube voxels is no longer limited by the number of detector pixels. However,the reconstruction algorithms have high computation costs and render limited performance in real scenarios. There are two main development trends of snapshot spectral imaging technology. On the one hand,extending the dimension of detection can provide a more comprehensive analysis of the target. For example,the snapshot spectral volumetric imaging technology can detect the volumetric target in real time and obtain four-dimensional(4D)data,including three-dimensional(3D)spatial and 1D spectral information. There are two main methodologies to realize snapshot spectral volumetric imaging. One methodology integrates a spectral imaging system with a volumetric imaging system. The two imaging systems work independently and their detection data are merged by post-processin

关 键 词：快照式光谱成像 多维信息调制 立体成像 数据处理 图像超分辨 

分 类 号：TH744[机械工程—光学工程] TP391[机械工程—仪器科学与技术]