<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">reflectance transformation imaging</topic></authority><related type="broader"><topic>digital imaging</topic></related><variant type="other"><topic>RTI</topic></variant><variant type="other"><topic>imaging, reflectance transformation</topic></variant> <note xml:lang="en"><![CDATA[ A computational imaging technique that creates a virtual three-dimensional digital surrogate of a subject that can be interactively relit from any direction. An RTI file is a composite of multiple images of a subject photographed from a fixed position for which a light source has been repositioned at a constant radius from the subject, thus creating a hemisphere of positions. ]]></note></mads>