Open Access4D line-scan hyperspectral imaging
Author(s) -
Jiaqiong Li,
Yi Zheng,
Lingling Liu,
Beiwen Li
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.441213
Subject(s) - optics , hyperspectral imaging , multispectral image , calibration , spectrograph , image resolution , spectral imaging , structured light 3d scanner , spectral resolution , projection (relational algebra) , resolution (logic) , remote sensing , physics , scanner , computer science , artificial intelligence , spectral line , geology , algorithm , quantum mechanics , astronomy
This paper proposes a 4D line-scan hyperspectral imager that combines 3D geometrical measurement and spectral detection with high spectral resolution and spatial accuracy. We investigated the geometrical optical model of a camera attaching with a spectrograph, theoretically explored the mathematical model for line-scan fringe projection profilometry, and established the 3D reconstruction and calibration methods under this proposed line-scan high-dimensional imaging system. The spectral resolution of the system is 2.8 nm, and the spatial root-mean-square-error is 0.0895 mm when measuring a standard sphere with a diameter of 40.234 mm. We measure a colored statue to showcase the intensity change along the dimension of wavelength. In addition, the quality and defect of the spinach leaves are inspected based on spectral data and depth data, which demonstrates the potential application of the system in the food industry.