The potential of Reflectance Transformation Imaging in Architectural Paint Research and the study of historic interiors: a case study from Stowe House, England
| Autor: | Eleni Katoula, Rhiannon Clarricoates |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Painting
060102 archaeology High magnification V360 History of Architecture 020207 software engineering 06 humanities and the arts 02 engineering and technology Conservation Substrate (printing) Texture (geology) Cultural heritage K250 Conservation of Buildings Computer graphics (images) 0202 electrical engineering electronic engineering information engineering Media Technology 0601 history and archaeology General Materials Science Stratigraphy (archaeology) Polynomial texture mapping Texture mapping Geology W160 Fine Art Conservation |
| Zdroj: | Journal of the Institute of Conservation. 42:135-150 |
| ISSN: | 1945-5232 1945-5224 |
| DOI: | 10.1080/19455224.2019.1605919 |
| Popis: | Reflectance Transformation Imaging has been largely used for the recording, documentation, and analysis of cultural heritage. A series of images of a static object, taken in raking light at constant exposure, is synthetized using the Polynomial Texture Mapping or the Hemispherical Harmonics fitter, resulting in polynomial texture maps or Reflectance Transformation Images. These visualizations capture colour and texture information, revealing low relief detail and emphasizing surface topography. RTI has found several applications in the study of painted surfaces, yet it has not been utilized for the study of historic interiors. More commonly, this would be achieved through Architectural Paint Research, a process of examining the painted finishes to the interior or exterior of an historic structure, to establish its decorative history. Typically, this is achieved through a combination of archival research; sampling of the paint and substrate layers that are analysed at high magnification in cross-section; and through careful layer-by-layer exposures of the accumulated paint stratigraphy so that the texture, sheen and colour of the paint layer can be observed. The latter of these techniques is especially important if an underlying scheme is decorative or polychromatic. This study evaluates the use of RTI for the study of historic wall paintings, with an emphasis on the revelation of overpainted designs. Considering the efficiency of RTI in recording and documentation of subtle surface variations, this research explores the use of texture comparisons between exposed, restored and covered areas of the wall painting as a diagnostic tool and for appraising condition. |
| Databáze: | OpenAIRE |
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