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Lensless Multispectral Camera Based on a Coded Aperture Array
Multispectral imaging can be applied to water quality monitoring, medical diagnosis, and other applications, but the principle of multispectral imaging is different from the principle of hyper-spectral imaging. Multispectral imaging is generally achieved through filters, so multiple photos are requi...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8620651/ https://www.ncbi.nlm.nih.gov/pubmed/34833833 http://dx.doi.org/10.3390/s21227757 |
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author | Wang, Jianwei Zhao, Yan |
author_facet | Wang, Jianwei Zhao, Yan |
author_sort | Wang, Jianwei |
collection | PubMed |
description | Multispectral imaging can be applied to water quality monitoring, medical diagnosis, and other applications, but the principle of multispectral imaging is different from the principle of hyper-spectral imaging. Multispectral imaging is generally achieved through filters, so multiple photos are required to obtain spectral information. Using multiple detectors to take pictures at the same time increases the complexity and cost of the system. This paper proposes a simple multispectral camera based on lensless imaging, which does not require multiple lenses. The core of the system is the multispectral coding aperture. The coding aperture is divided into different regions and each region transmits the light of one wavelength, such that the spectral information of the target can be coded. By solving the inverse problem of sparse constraints, the multispectral information of the target is inverted. Herein, we analyzed the characteristics of this multispectral camera and developed a principle prototype to obtain experimental results. |
format | Online Article Text |
id | pubmed-8620651 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-86206512021-11-27 Lensless Multispectral Camera Based on a Coded Aperture Array Wang, Jianwei Zhao, Yan Sensors (Basel) Article Multispectral imaging can be applied to water quality monitoring, medical diagnosis, and other applications, but the principle of multispectral imaging is different from the principle of hyper-spectral imaging. Multispectral imaging is generally achieved through filters, so multiple photos are required to obtain spectral information. Using multiple detectors to take pictures at the same time increases the complexity and cost of the system. This paper proposes a simple multispectral camera based on lensless imaging, which does not require multiple lenses. The core of the system is the multispectral coding aperture. The coding aperture is divided into different regions and each region transmits the light of one wavelength, such that the spectral information of the target can be coded. By solving the inverse problem of sparse constraints, the multispectral information of the target is inverted. Herein, we analyzed the characteristics of this multispectral camera and developed a principle prototype to obtain experimental results. MDPI 2021-11-22 /pmc/articles/PMC8620651/ /pubmed/34833833 http://dx.doi.org/10.3390/s21227757 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Wang, Jianwei Zhao, Yan Lensless Multispectral Camera Based on a Coded Aperture Array |
title | Lensless Multispectral Camera Based on a Coded Aperture Array |
title_full | Lensless Multispectral Camera Based on a Coded Aperture Array |
title_fullStr | Lensless Multispectral Camera Based on a Coded Aperture Array |
title_full_unstemmed | Lensless Multispectral Camera Based on a Coded Aperture Array |
title_short | Lensless Multispectral Camera Based on a Coded Aperture Array |
title_sort | lensless multispectral camera based on a coded aperture array |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8620651/ https://www.ncbi.nlm.nih.gov/pubmed/34833833 http://dx.doi.org/10.3390/s21227757 |
work_keys_str_mv | AT wangjianwei lenslessmultispectralcamerabasedonacodedaperturearray AT zhaoyan lenslessmultispectralcamerabasedonacodedaperturearray |