We use advanced technologies to document and analyze the condition of artworks. This allows us to record the current condition and in many cases identify signs of aging and deterioration before they become visible to the human eye. These techniques include RTI (Reflectance Transformation Imaging), XRF (X-ray fluorescence), Photogrammetry, and Infrared Photography.
RTI is a method that captures how a complex material interacts with light—an important advance in our ability to investigate and monitor works of art that complements other imaging methods such as spectral imaging. While spectral imaging reports on surface phenomena, RTI provides information on the physical changes in the object itself as it reports on geometry. These changes include parchment cockling and distortion, movement of wood objects and flaking of stone, to name a few. All of these derive from changes in the complex surface geometry as measured by RTI.
Photogrammetry can be used to create 3D models of buildings or objects by taking overlapping images of an object, which are combined using software to create point clouds which are then translated into a 3D mesh. The mesh is covered with a texture comprised of photographic images giving it color and detail. These detailed surfaced maps can be used document an objects condition and monitor for changes.