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Ultraviolet RTI

A painted and incised ceramic vessel was used as case study in an attempt to evaluate the efficiency of Reflected UV (UVR) RTI and UV induced visible fluorescence (UVF) RTI. Gnathian skyphos from the University of Southampton Archaeological Collection The Highlight RTI data capture took place at the archaeological imaging laboratory of the University of Southampton, using a UV-VIS-IR modified DSLR camera, adequate filters and lighting. Continue reading →

Conservation and computational imaging technologies

Silver roman imperatorial denarius of Julius Caesar, CAESAR /Aeneas advancing to front, holding Palladium in palm of right hand and carrying father Anchises on left shoulder (O 19 mm), Archaeological Museum of Amphipolis, clockwise from top left: digital image, comparison between PTM (top) and a standard computer graphic approximation (below), normal map and RTI visualization in specular enhancement rendering mode (c) Eleni Kotoula I’m Eleni Kotoula, a PhD student in the Archaeological... Continue reading →

Papyrus RTI case study

The Derveni tombs discovered in 1962 close to Thessaloniki in North Greece are considered one of the most significant archaeological sites in northern Greece because of their numerous rich grave offerings and their important location in the ancient Mygdonian city of Lete, on the pass of Via Egnatia. The cemetery comprises seven graves, and according to the excavation publication dates to 320–290 BC. Continue reading →

Icons RTI case study

Icons: Production  techniques and examination methodology Icon or ikon from Greek eikōn is a representation of a sacred or sanctified Christian personage used in religious worship in the Russian or Greek Orthodox Church. The production of icons has been described by the monk Dionisios ek Fourna in 1728-1733. Icons are typically painted on a wooden panel with the egg tempera painting technique, over a layer of gypsum and glue (preparation layer). Continue reading →

Transmitted RTI

Following our successful experimentation with microscopic RTI and multispectral RTI, we develop a transmitted RTI methodology, inspired by transmitted photography, a set-up proposed for conservation documentation of translucent materials, canvas paintings, mounded papyri, photographic material, and works of art on paper or archival material. The transmitted RTI provides an enhanced RTI visualisation, complementary to reflected visible and infrared RTI. Continue reading →

Infrared RTI: Experimentation towards the development of multispectral RTI

Multispectral Imaging and Reflectance Transformation Imaging (RTI) are both useful imaging tools for the examination of antiquities and works of art.  Previous research proved that RTI contributes significantly in prevention, investigation, examination, analysis and documentation, communication, dissemination and presentation of antiquities and works of art. Continue reading →

Microscopic RTI

To fully appreciate the application of RTI in conservation practice, one should take into consideration conservation needs for limited human-object interaction, high quality and affordable visual analysis, microscopic levels of detail and advanced documentation. There is no doubt that methodological developments are necessary in order to meet those needs. One of the most obvious of these, even from the earlier stages of our research, was the microscopic level of detail required for conservation. Continue reading →