Combining a Grayscale Camera and Spectrometers for High Quality Close-range Hyperspectral Imaging of Non-planar Surfaces

Stefan Lörcks, Josef Pauli

2022

Abstract

In recent years, hyperspectral imaging (HSI) has emerged to become a crucial method for both remote sensing and close-range surface analysis. In this paper, we present substantial upgrades of our previously published system for multispectral and hyperspectral surface analysis (Hegemann et al., 2017). Besides minor changes in illumination, we carefully evaluated different approaches for reflectance correction using up to eight calibration standards. Wavelength correction, which ensures an exact wavelength fit, is also done using a calibration standard. Therefore, our calibration pipeline provides high-quality hyperspectral data that is mostly independent of the hardware acquiring it, as we remove the impact of illumination and sensor sensitivity and consequently solely dependent on the sample. Additionally, as the main contribution, we present a method to acquire hyperspectral images from a non-planar surface using spectrometers without a time-consuming auto- focus at every pixel position. We do this by generating a registered depth map from gray value images of the sample. Since annotated hyperspectral data is in high demand, we also contribute two initial pixel-wise labeled close-range hyperspectral datasets generated with our upgraded system for further research and benchmarks.

Paper Citation

in Harvard Style

Lörcks S. and Pauli J. (2022). Combining a Grayscale Camera and Spectrometers for High Quality Close-range Hyperspectral Imaging of Non-planar Surfaces. In Proceedings of the 10th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS, ISBN 978-989-758-554-8, pages 26-37. DOI: 10.5220/0010789300003121

in Bibtex Style

@conference{photoptics22,
author={Stefan Lörcks and Josef Pauli},
title={Combining a Grayscale Camera and Spectrometers for High Quality Close-range Hyperspectral Imaging of Non-planar Surfaces},
booktitle={Proceedings of the 10th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,},
year={2022},
pages={26-37},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0010789300003121},
isbn={978-989-758-554-8},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 10th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,
TI - Combining a Grayscale Camera and Spectrometers for High Quality Close-range Hyperspectral Imaging of Non-planar Surfaces
SN - 978-989-758-554-8
AU - Lörcks S.
AU - Pauli J.
PY - 2022
SP - 26
EP - 37
DO - 10.5220/0010789300003121