Extraction of Colour Information from Digital Images Towards Cultural Heritage Characterisation Applications

Colour is a primary characteristic of visual perception and a very important characteristic to describe cultural heritage works in a variety of shapes, sizes and materials. To quantify colours, portable colorimeters are often carried and used for measuring colour of interest. Spatial resolution of...

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Autores principales: Woo Sik Yoo, Jung Gon Kim, Kitaek Kang, Yeongsik Yoo
Formato: article
Lenguaje:EN
Publicado: SEAMEO Regional Centre for Archaeology and Fine Arts 2021
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Acceso en línea:https://doaj.org/article/3b653a96c86f4c0f96d532f6544e86da
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spelling oai:doaj.org-article:3b653a96c86f4c0f96d532f6544e86da2021-11-13T19:38:37ZExtraction of Colour Information from Digital Images Towards Cultural Heritage Characterisation Applications 0858-19752586-8721https://doaj.org/article/3b653a96c86f4c0f96d532f6544e86da2021-11-01T00:00:00Zhttps://www.spafajournal.org/index.php/spafajournal/article/view/690https://doaj.org/toc/0858-1975https://doaj.org/toc/2586-8721 Colour is a primary characteristic of visual perception and a very important characteristic to describe cultural heritage works in a variety of shapes, sizes and materials. To quantify colours, portable colorimeters are often carried and used for measuring colour of interest. Spatial resolution of colorimeters is manufacturer and model dependent and typically worse than 3 - 10 mm in diameter. The colour measurement has to be done on site at the time of interest. It poses very significant limitations in colorimetric characterization of cultural heritages. In this paper, the possibility of extraction of colour information from digital photographs, scanned images and video files using customized image processing/analysis software (PicMan) was investigated for cultural heritage characterization applications. As colour information extraction examples, a commercial Gouache paint colour card, a digital photograph, a portrait of a Korean scholar of Joseon Dynasty and a severely deteriorated old medical text book before and after restoration were examined.  Colour information from various digital images was successfully extracted from points and regions of interest in RGB, HSV, L*a*b*, Munsell colour and hexadecimal colour code formats. The spatial resolution of colour information extraction is as small as a single pixel in a digital image. Woo Sik YooJung Gon KimKitaek KangYeongsik YooSEAMEO Regional Centre for Archaeology and Fine Artsarticledigital imagescolour information extractionimage processing/analysis softwarecultural heritage characterizationFine ArtsNArchaeologyCC1-960ENSPAFA Journal, Vol 5 (2021)
institution DOAJ
collection DOAJ
language EN
topic digital images
colour information extraction
image processing/analysis software
cultural heritage characterization
Fine Arts
N
Archaeology
CC1-960
spellingShingle digital images
colour information extraction
image processing/analysis software
cultural heritage characterization
Fine Arts
N
Archaeology
CC1-960
Woo Sik Yoo
Jung Gon Kim
Kitaek Kang
Yeongsik Yoo
Extraction of Colour Information from Digital Images Towards Cultural Heritage Characterisation Applications
description Colour is a primary characteristic of visual perception and a very important characteristic to describe cultural heritage works in a variety of shapes, sizes and materials. To quantify colours, portable colorimeters are often carried and used for measuring colour of interest. Spatial resolution of colorimeters is manufacturer and model dependent and typically worse than 3 - 10 mm in diameter. The colour measurement has to be done on site at the time of interest. It poses very significant limitations in colorimetric characterization of cultural heritages. In this paper, the possibility of extraction of colour information from digital photographs, scanned images and video files using customized image processing/analysis software (PicMan) was investigated for cultural heritage characterization applications. As colour information extraction examples, a commercial Gouache paint colour card, a digital photograph, a portrait of a Korean scholar of Joseon Dynasty and a severely deteriorated old medical text book before and after restoration were examined.  Colour information from various digital images was successfully extracted from points and regions of interest in RGB, HSV, L*a*b*, Munsell colour and hexadecimal colour code formats. The spatial resolution of colour information extraction is as small as a single pixel in a digital image.
format article
author Woo Sik Yoo
Jung Gon Kim
Kitaek Kang
Yeongsik Yoo
author_facet Woo Sik Yoo
Jung Gon Kim
Kitaek Kang
Yeongsik Yoo
author_sort Woo Sik Yoo
title Extraction of Colour Information from Digital Images Towards Cultural Heritage Characterisation Applications
title_short Extraction of Colour Information from Digital Images Towards Cultural Heritage Characterisation Applications
title_full Extraction of Colour Information from Digital Images Towards Cultural Heritage Characterisation Applications
title_fullStr Extraction of Colour Information from Digital Images Towards Cultural Heritage Characterisation Applications
title_full_unstemmed Extraction of Colour Information from Digital Images Towards Cultural Heritage Characterisation Applications
title_sort extraction of colour information from digital images towards cultural heritage characterisation applications
publisher SEAMEO Regional Centre for Archaeology and Fine Arts
publishDate 2021
url https://doaj.org/article/3b653a96c86f4c0f96d532f6544e86da
work_keys_str_mv AT woosikyoo extractionofcolourinformationfromdigitalimagestowardsculturalheritagecharacterisationapplications
AT junggonkim extractionofcolourinformationfromdigitalimagestowardsculturalheritagecharacterisationapplications
AT kitaekkang extractionofcolourinformationfromdigitalimagestowardsculturalheritagecharacterisationapplications
AT yeongsikyoo extractionofcolourinformationfromdigitalimagestowardsculturalheritagecharacterisationapplications
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