This publication provides practical guidance on reflectance transformation imaging (RTI), an innovative multi-light imaging technique, and in particular, on the polynomial texture mapping (PTM) method for fitting reflectance distribution data. It aims specifically to offer user-friendly guidelines and advice for using the highlight-RTI (H-RTI) capture method, a flexible and low-cost RTI recording approach.
Although these guidelines focus on H-RTI, an alternative recording technique that utilises a pre-fabricated dome will also be introduced, so that readers are able to decide which capture method is most appropriate for their recording project. Several case studies demonstrate how the technology can be used to understand better the cultural heritage we record. These practical examples provide solutions to some of the common challenges encountered in using this recording approach.
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