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A Wide Field-of-View Light-Field Camera with Adjustable Multiplicity for Practical Applications

The long-fascinated idea of creating 3D images that depict depth information along with color and brightness has been realized with the advent of a light-field camera (LFC). Recently advanced LFCs mainly utilize micro-lens arrays (MLAs) as a key component to acquire rich 3D information, including de...

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Autores principales: Kim, Hyun Myung, Yoo, Young Jin, Lee, Jeong Min, Song, Young Min
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9104861/
https://www.ncbi.nlm.nih.gov/pubmed/35591145
http://dx.doi.org/10.3390/s22093455
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author Kim, Hyun Myung
Yoo, Young Jin
Lee, Jeong Min
Song, Young Min
author_facet Kim, Hyun Myung
Yoo, Young Jin
Lee, Jeong Min
Song, Young Min
author_sort Kim, Hyun Myung
collection PubMed
description The long-fascinated idea of creating 3D images that depict depth information along with color and brightness has been realized with the advent of a light-field camera (LFC). Recently advanced LFCs mainly utilize micro-lens arrays (MLAs) as a key component to acquire rich 3D information, including depth, encoded color, reflectivity, refraction, occlusion, and transparency. The wide field-of-view (FOV) capability of LFCs, which is expected to be of great benefit for extended applications, is obstructed by the fundamental limitations of LFCs. Here, we present a practical strategy for the wide FOV-LFC by adjusting the spacing factor. Multiplicity (M) is the inverse magnification of the MLA located between the image plane and the sensor, which was introduced as the overlap ratio between the micro-images. M was adopted as a design parameter in several factors of the LFC, and a commercial lens with adjustable FOV was used as the main lens for practicality. The light-field (LF) information was evaluated by considering the pixel resolution and overlapping area in narrow and wide FOV. The M was optimized for narrow and wide FOV, respectively, by the trade-off relationship between pixel resolution and geometric resolution. Customized wide FOV-LFCs with different M were compared by spatial resolution test and depth information test, and the wide FOV-LFC with optimized M provides LF images with high accuracy.
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spelling pubmed-91048612022-05-14 A Wide Field-of-View Light-Field Camera with Adjustable Multiplicity for Practical Applications Kim, Hyun Myung Yoo, Young Jin Lee, Jeong Min Song, Young Min Sensors (Basel) Article The long-fascinated idea of creating 3D images that depict depth information along with color and brightness has been realized with the advent of a light-field camera (LFC). Recently advanced LFCs mainly utilize micro-lens arrays (MLAs) as a key component to acquire rich 3D information, including depth, encoded color, reflectivity, refraction, occlusion, and transparency. The wide field-of-view (FOV) capability of LFCs, which is expected to be of great benefit for extended applications, is obstructed by the fundamental limitations of LFCs. Here, we present a practical strategy for the wide FOV-LFC by adjusting the spacing factor. Multiplicity (M) is the inverse magnification of the MLA located between the image plane and the sensor, which was introduced as the overlap ratio between the micro-images. M was adopted as a design parameter in several factors of the LFC, and a commercial lens with adjustable FOV was used as the main lens for practicality. The light-field (LF) information was evaluated by considering the pixel resolution and overlapping area in narrow and wide FOV. The M was optimized for narrow and wide FOV, respectively, by the trade-off relationship between pixel resolution and geometric resolution. Customized wide FOV-LFCs with different M were compared by spatial resolution test and depth information test, and the wide FOV-LFC with optimized M provides LF images with high accuracy. MDPI 2022-04-30 /pmc/articles/PMC9104861/ /pubmed/35591145 http://dx.doi.org/10.3390/s22093455 Text en © 2022 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
Kim, Hyun Myung
Yoo, Young Jin
Lee, Jeong Min
Song, Young Min
A Wide Field-of-View Light-Field Camera with Adjustable Multiplicity for Practical Applications
title A Wide Field-of-View Light-Field Camera with Adjustable Multiplicity for Practical Applications
title_full A Wide Field-of-View Light-Field Camera with Adjustable Multiplicity for Practical Applications
title_fullStr A Wide Field-of-View Light-Field Camera with Adjustable Multiplicity for Practical Applications
title_full_unstemmed A Wide Field-of-View Light-Field Camera with Adjustable Multiplicity for Practical Applications
title_short A Wide Field-of-View Light-Field Camera with Adjustable Multiplicity for Practical Applications
title_sort wide field-of-view light-field camera with adjustable multiplicity for practical applications
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9104861/
https://www.ncbi.nlm.nih.gov/pubmed/35591145
http://dx.doi.org/10.3390/s22093455
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