Assessment of real aging in selection process of replacement materials for stone monuments conservation.

Nicolas Concha Lozano, Dominique Lafon, Olivier Eterradossi, Pierre Gaudon

Abstract

Reconstruction of monuments often raises the question of stones replacement. It must be aesthetically durable, which means the stone must age like the original one. This study presents an image processing chain, from capture to visualisation, to compare stones at different states of aging: recently extracted from quarry, weathered on old buildings, and cleaned on monuments recently restored. This tool includes: (1) a digital still camera calibration, (2) a chromatic adaptation transform and (3) a resizing process. To test it, a case study was conducted to assess the compatibility of three types of limestone. This graphical tool helps the selection of replacement materials by visual comparison between several possible stones in order to select them by aging properties and visual resemblance.


Keywords

Compatibility; Stone; Calibration; Colour; Cultural heritage

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References

BRILL, Michael H., "The relation between the color of the illuminant and the color of the illuminated object". Color Research & Application. (1995) 20: 70– 5. doi:10.1002/col.5080200112.)

CHORRO E., PERALES E., de Fez D., LUQUE M. J., and MARTÍNEZ-VERDÚ F. M., “Application of the S-CIELAB color model to processed and calibrated images with a colorimetric dithering method,” Optics Express 15, no. 12 (Juin 11, 2007): 7810-7817. http://dx.doi.org/10.1364/OE.15.007810

FAIRCHILD M.D., “A Revision of CIECAM97s for Practical Applications ”, dans Color Research & Applications, Wiley Interscience, vol. 25, no 4, August 2000, p. 260–266

ICOMOS-ISCS, Illustrated glossary on stone deterioration patterns, 2008

THORNBUSH. M.J. and VILES, H.A., “Photo-based decay mapping of replaced stone blocks on the boundary wall of Worcester College, Oxford”. Building stone decay: from diagnosis to conservation. In, Prikryl, R. and Smith, B.J. (eds.) (2007) Geological Society Special Publication, 271: 69-75.P. https://doi.org/10.1144/GSL.SP.2007.271.01.08

THORNBUSH. M.J., “Grayscale calibration of outdoor photographic surveys of historical Stone Walls in Oxford, England,” Color Research & Application 33, no. 1 (2, 2008): 61-67. https://doi.org/10.1002/col.20374

STOKES M. (Hewlett-Packard), ANDERSON M. (Microsoft), CHANDRASEKAR S. (Microsoft), MOTTA R. (Hewlett-Packard) Version 1.10, November 5, 1996 “A Standard Default Color Space for the Internet: sRGB” ICC, [online] http://www.color.org/sRGB.xalter [Consulta: 22-04-2010].

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Cited-By (articles included in Crossref)

This journal is a Crossref Cited-by Linking member. This list shows the references that citing the article automatically, if there are. For more information about the system please visit Crossref site

1. Color thresholds for aesthetically compatible replacement of stones on monuments
Nicolas Concha-Lozano, Dominique Lafon, Noura Sabiri, Pierre Gaudon
Color Research & Application  vol: 38  issue: 5  first page: 356  year: 2013  
doi: 10.1002/col.21729



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Universitat Politècnica de València

Official journal of Spanish Society of Virtual Archaeology

e-ISSN: 1989-9947   https://dx.doi.org/10.4995/var