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
Materias:	digital images colour information extraction image processing/analysis software cultural heritage characterization Fine Arts N Archaeology CC1-960
Acceso en línea:	https://doaj.org/article/51e0e66b2a5b4c048d0c7d5eba4c8791
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spelling	oai:doaj.org-article:51e0e66b2a5b4c048d0c7d5eba4c87912021-11-11T19:37:51ZExtraction of Colour Information from Digital Images Towards Cultural Heritage Characterisation Applications 0858-19752586-8721https://doaj.org/article/51e0e66b2a5b4c048d0c7d5eba4c87912021-11-01T00:00:00Zhttps://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, Lab*, 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, Lab*, 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/51e0e66b2a5b4c048d0c7d5eba4c8791
work_keys_str_mv	AT woosikyoo extractionofcolourinformationfromdigitalimagestowardsculturalheritagecharacterisationapplications AT junggonkim extractionofcolourinformationfromdigitalimagestowardsculturalheritagecharacterisationapplications AT kitaekkang extractionofcolourinformationfromdigitalimagestowardsculturalheritagecharacterisationapplications AT yeongsikyoo extractionofcolourinformationfromdigitalimagestowardsculturalheritagecharacterisationapplications
_version_	1718431465443688448

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

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