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Image Vignetting Correction Using a Deformable Radial Polynomial Model
Image vignetting is one of the major radiometric errors that occur in lens-camera systems. In many applications, vignetting is an undesirable effect; therefore, when it is impossible to fully prevent its occurrence, it is necessary to use computational methods for its correction. In probably the mos...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9921563/ https://www.ncbi.nlm.nih.gov/pubmed/36772200 http://dx.doi.org/10.3390/s23031157 |
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author | Bal, Artur Palus, Henryk |
author_facet | Bal, Artur Palus, Henryk |
author_sort | Bal, Artur |
collection | PubMed |
description | Image vignetting is one of the major radiometric errors that occur in lens-camera systems. In many applications, vignetting is an undesirable effect; therefore, when it is impossible to fully prevent its occurrence, it is necessary to use computational methods for its correction. In probably the most frequently used approach to the vignetting correction, that is, the flat-field correction, the use of appropriate vignetting models plays a pivotal role. The radial polynomial (RP) model is commonly used, but for its proper use, the actual vignetting of the analyzed lens-camera system has to be a radial function. However, this condition is not fulfilled by many systems. There exist more universal models of vignetting; however, these models are much more sophisticated than the RP model. In this article, we propose a new model of vignetting named the Deformable Radial Polynomial (DRP) model, which joins the simplicity of the RP model with the universality of more sophisticated models. The DRP model uses a simple distance transformation and minimization method to match the radial vignetting model to the non-radial vignetting of the analyzed lens-camera system. The real-data experiment confirms that the DRP model, in general, gives better (up 35% or 50%, depending on the measure used) results than the RP model. |
format | Online Article Text |
id | pubmed-9921563 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-99215632023-02-12 Image Vignetting Correction Using a Deformable Radial Polynomial Model Bal, Artur Palus, Henryk Sensors (Basel) Article Image vignetting is one of the major radiometric errors that occur in lens-camera systems. In many applications, vignetting is an undesirable effect; therefore, when it is impossible to fully prevent its occurrence, it is necessary to use computational methods for its correction. In probably the most frequently used approach to the vignetting correction, that is, the flat-field correction, the use of appropriate vignetting models plays a pivotal role. The radial polynomial (RP) model is commonly used, but for its proper use, the actual vignetting of the analyzed lens-camera system has to be a radial function. However, this condition is not fulfilled by many systems. There exist more universal models of vignetting; however, these models are much more sophisticated than the RP model. In this article, we propose a new model of vignetting named the Deformable Radial Polynomial (DRP) model, which joins the simplicity of the RP model with the universality of more sophisticated models. The DRP model uses a simple distance transformation and minimization method to match the radial vignetting model to the non-radial vignetting of the analyzed lens-camera system. The real-data experiment confirms that the DRP model, in general, gives better (up 35% or 50%, depending on the measure used) results than the RP model. MDPI 2023-01-19 /pmc/articles/PMC9921563/ /pubmed/36772200 http://dx.doi.org/10.3390/s23031157 Text en © 2023 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 Bal, Artur Palus, Henryk Image Vignetting Correction Using a Deformable Radial Polynomial Model |
title | Image Vignetting Correction Using a Deformable Radial Polynomial Model |
title_full | Image Vignetting Correction Using a Deformable Radial Polynomial Model |
title_fullStr | Image Vignetting Correction Using a Deformable Radial Polynomial Model |
title_full_unstemmed | Image Vignetting Correction Using a Deformable Radial Polynomial Model |
title_short | Image Vignetting Correction Using a Deformable Radial Polynomial Model |
title_sort | image vignetting correction using a deformable radial polynomial model |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9921563/ https://www.ncbi.nlm.nih.gov/pubmed/36772200 http://dx.doi.org/10.3390/s23031157 |
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