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Reflectance Transformation Imaging

True Gigapixel RTI

The ACRG has always been anĀ integralĀ part within the recent development of RTI. ACRG's involvement began with the AHRC funded RTISAD projectĀ where we piloted the technique on inscribed ancient documents and archaeological artefacts. We likewise raised awareness of RTI in research and public communities in the UK. Continue reading →

Icons RTI case study

Icons: ProductionĀ  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 →

Late Bronze Age Stelae, Craftspeople and Digital Technologies: Some Recent Explorations

Reflectance Transformation Imaging (RTI) is revealing itself as a very powerful tool to examine prehistoric rock art. Through the application of different filters and the manipulation of the incidence of light, RTI provides an enhanced visual experience of the micro-topography of engraved stones, enabling the detection of subtle details that are difficult, at times impossible, to be seen through other recording techniques. Continue reading →