MANOVA‐biplot statistical analysis of the effect of artificial ageing (freezing/thawing) on the colour of treated granite stones

Abstract

Colour is one of the parameters currently used to monitor the quality of a conservation treatment of ornamen

Colour and ultrasound propagation speed changes by different ageing of freezing/thawing and cooling/heating in granitic materials

“…The Canonical Biplot is equivalent to MANOVA analysis (Multivariate Analysis of Variance), but it includes all the characteristics of the Biplot method (Gabriel, 1971(Gabriel, , 1972(Gabriel, , 1995, which is aimed at discriminating the set of groups of previously established populations. This technique was later developed and completed (Amaro, 2004;Galindo, 1986;Vicente-Villardón, 2012), and applied to the field of cultural heritage conservation (Iñigo et al, 2004;Varas et al, 2005;Vicente and VicenteTavera, 2001). …”

“…Colour is a parameter that must be currently controlled to monitor the quality a quarry rock when it is used in a monument, both as regards its deterioration due to environmental (Sebastián-Pardo and Zezza, 1998;Zezza, 2002a) and microenvironmental factors in certain zones of buildings (Zezza, 2002b) and after the application of conservation treatments (García-Talegón et al, 1998;Iñigo et al, 1997Iñigo et al, , 2004). …”

Functional experiment design for the analysis of colour changes in granite using new L∗a∗bRivas1, Matías2, Taboada3 et al. 2011Journal of Computational and Applied Mathematics17020View full textAdd to dashboardCite

“…The literature on heritage conservation contains a number of studies that evaluate changes in rock colour as a result, e.g., of natural weathering [2], artificial colour change testing [3], cleaning [2] and the application of protective treatments [4]. Our proposed analysis method is applied to the study of colour changes in sea-salt-contaminated granite following different desalination processes.…”

“…Colour changes resulting from different stone treatments have been analysed in descriptive statistical studies using different colorimetric coordinates [4,3].…”

Crowd-sourced mobile phone images for heritage conservation monitoring

“…While we may not able to identifY each change mechanism with a set of color images, we should be able to differentiate and segment these processes and measure their rate of change. Studies shows that weathering and soi ling primari Iy change L * and b*, rather than a * [4,5,6,7].…”