How good are RGB cameras retrieving colors of natural scenes and paintings?—A study based on hyperspectral imaging
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/68297 |
Resumo: | RGB digital cameras (RGB) compress the spectral information into a trichromatic system capable of approximately representing the actual colors of objects. Although RGB digital cameras follow the same compression philosophy as the human eye (OBS), the spectral sensitivity is different. To what extent they provide the same chromatic experiences is still an open question, especially with complex images. We addressed this question by comparing the actual colors derived from spectral imaging with those obtained with RGB cameras. The data from hyperspectral imaging of 50 natural scenes and 89 paintings was used to estimate the chromatic differences between OBS and RGB. The corresponding color errors were estimated and analyzed in the color spaces CIELAB (using the color difference formulas Δ<i>E<sup>*</sup><sub>ab</sub></i> and CIEDE2000), <i>J<sub>z</sub>a<sub>z</sub>b<sub>z</sub></i>, and iCAM06. In CIELAB the most frequent error (using Δ<i>E<sup>*</sup><sub>ab</sub></i>) found was 5 for both paintings and natural scenes, a similarity that held for the other spaces tested. In addition, the distribution of errors across the color space shows that the errors are small in the achromatic region and increase with saturation. Overall, the results indicate that the chromatic errors estimated are close to the acceptance error and therefore RGB digital cameras are able to produce quite realistic colors of complex scenarios. |
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How good are RGB cameras retrieving colors of natural scenes and paintings?—A study based on hyperspectral imaginghyperspectral imagingnatural scenespaintingschromatic errorscolor differencenumber of colorsCiências Naturais::Ciências FísicasScience & TechnologyRGB digital cameras (RGB) compress the spectral information into a trichromatic system capable of approximately representing the actual colors of objects. Although RGB digital cameras follow the same compression philosophy as the human eye (OBS), the spectral sensitivity is different. To what extent they provide the same chromatic experiences is still an open question, especially with complex images. We addressed this question by comparing the actual colors derived from spectral imaging with those obtained with RGB cameras. The data from hyperspectral imaging of 50 natural scenes and 89 paintings was used to estimate the chromatic differences between OBS and RGB. The corresponding color errors were estimated and analyzed in the color spaces CIELAB (using the color difference formulas Δ<i>E<sup>*</sup><sub>ab</sub></i> and CIEDE2000), <i>J<sub>z</sub>a<sub>z</sub>b<sub>z</sub></i>, and iCAM06. In CIELAB the most frequent error (using Δ<i>E<sup>*</sup><sub>ab</sub></i>) found was 5 for both paintings and natural scenes, a similarity that held for the other spaces tested. In addition, the distribution of errors across the color space shows that the errors are small in the achromatic region and increase with saturation. Overall, the results indicate that the chromatic errors estimated are close to the acceptance error and therefore RGB digital cameras are able to produce quite realistic colors of complex scenarios.This work was supported by the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Funding UIDB/04650/2020.Multidisciplinary Digital Publishing InstituteUniversidade do MinhoLinhares, João M. M.Monteiro, José A. R.Bailão, AnaCardeira, LilianaKondo, TaiseiNakauchi, ShigekiPicollo, MarcelloCucci, CostanzaCasini, AndreaStefani, LorenzoNascimento, Sérgio M. C.20202020-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/68297engLinhares, J.M.M.; Monteiro, J.A.R.; Bailão, A.; Cardeira, L.; Kondo, T.; Nakauchi, S.; Picollo, M.; Cucci, C.; Casini, A.; Stefani, L.; Nascimento, S.M.C. How Good Are RGB Cameras Retrieving Colors of Natural Scenes and Paintings?—A Study Based on Hyperspectral Imaging. Sensors 2020, 20, 6242.1424-82201424-822010.3390/s2021624233139611https://www.mdpi.com/1424-8220/20/21/6242info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:42:01Zoai:repositorium.sdum.uminho.pt:1822/68297Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:39:10.057098Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
How good are RGB cameras retrieving colors of natural scenes and paintings?—A study based on hyperspectral imaging |
title |
How good are RGB cameras retrieving colors of natural scenes and paintings?—A study based on hyperspectral imaging |
spellingShingle |
How good are RGB cameras retrieving colors of natural scenes and paintings?—A study based on hyperspectral imaging Linhares, João M. M. hyperspectral imaging natural scenes paintings chromatic errors color difference number of colors Ciências Naturais::Ciências Físicas Science & Technology |
title_short |
How good are RGB cameras retrieving colors of natural scenes and paintings?—A study based on hyperspectral imaging |
title_full |
How good are RGB cameras retrieving colors of natural scenes and paintings?—A study based on hyperspectral imaging |
title_fullStr |
How good are RGB cameras retrieving colors of natural scenes and paintings?—A study based on hyperspectral imaging |
title_full_unstemmed |
How good are RGB cameras retrieving colors of natural scenes and paintings?—A study based on hyperspectral imaging |
title_sort |
How good are RGB cameras retrieving colors of natural scenes and paintings?—A study based on hyperspectral imaging |
author |
Linhares, João M. M. |
author_facet |
Linhares, João M. M. Monteiro, José A. R. Bailão, Ana Cardeira, Liliana Kondo, Taisei Nakauchi, Shigeki Picollo, Marcello Cucci, Costanza Casini, Andrea Stefani, Lorenzo Nascimento, Sérgio M. C. |
author_role |
author |
author2 |
Monteiro, José A. R. Bailão, Ana Cardeira, Liliana Kondo, Taisei Nakauchi, Shigeki Picollo, Marcello Cucci, Costanza Casini, Andrea Stefani, Lorenzo Nascimento, Sérgio M. C. |
author2_role |
author author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Linhares, João M. M. Monteiro, José A. R. Bailão, Ana Cardeira, Liliana Kondo, Taisei Nakauchi, Shigeki Picollo, Marcello Cucci, Costanza Casini, Andrea Stefani, Lorenzo Nascimento, Sérgio M. C. |
dc.subject.por.fl_str_mv |
hyperspectral imaging natural scenes paintings chromatic errors color difference number of colors Ciências Naturais::Ciências Físicas Science & Technology |
topic |
hyperspectral imaging natural scenes paintings chromatic errors color difference number of colors Ciências Naturais::Ciências Físicas Science & Technology |
description |
RGB digital cameras (RGB) compress the spectral information into a trichromatic system capable of approximately representing the actual colors of objects. Although RGB digital cameras follow the same compression philosophy as the human eye (OBS), the spectral sensitivity is different. To what extent they provide the same chromatic experiences is still an open question, especially with complex images. We addressed this question by comparing the actual colors derived from spectral imaging with those obtained with RGB cameras. The data from hyperspectral imaging of 50 natural scenes and 89 paintings was used to estimate the chromatic differences between OBS and RGB. The corresponding color errors were estimated and analyzed in the color spaces CIELAB (using the color difference formulas Δ<i>E<sup>*</sup><sub>ab</sub></i> and CIEDE2000), <i>J<sub>z</sub>a<sub>z</sub>b<sub>z</sub></i>, and iCAM06. In CIELAB the most frequent error (using Δ<i>E<sup>*</sup><sub>ab</sub></i>) found was 5 for both paintings and natural scenes, a similarity that held for the other spaces tested. In addition, the distribution of errors across the color space shows that the errors are small in the achromatic region and increase with saturation. Overall, the results indicate that the chromatic errors estimated are close to the acceptance error and therefore RGB digital cameras are able to produce quite realistic colors of complex scenarios. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020 2020-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/1822/68297 |
url |
http://hdl.handle.net/1822/68297 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Linhares, J.M.M.; Monteiro, J.A.R.; Bailão, A.; Cardeira, L.; Kondo, T.; Nakauchi, S.; Picollo, M.; Cucci, C.; Casini, A.; Stefani, L.; Nascimento, S.M.C. How Good Are RGB Cameras Retrieving Colors of Natural Scenes and Paintings?—A Study Based on Hyperspectral Imaging. Sensors 2020, 20, 6242. 1424-8220 1424-8220 10.3390/s20216242 33139611 https://www.mdpi.com/1424-8220/20/21/6242 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Multidisciplinary Digital Publishing Institute |
publisher.none.fl_str_mv |
Multidisciplinary Digital Publishing Institute |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799132931088711680 |