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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...

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Detalles Bibliográficos
Autores principales: Wang, Jianwei, Zhao, Yan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
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.
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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
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