![]() Multi-modal 2D and 3D imaging together with other analytical techniques were applied to document and examine coins, an approach that has been demonstrated in other Heritage Science projects. The results indicate the feasibility of such techniques for museum documentation and as contribution to scientific examination of coins in general. The coins have been examined by the following techniques: dome photography for image sets for PTM/RTI visualisation and photometric stereo X-ray microtomography for detection of cracks or impurities Scanning Electron Microscopy for detailed surface investigation Energy-Dispersive X-ray Spectroscopy for elemental analysis micro X-ray fluorescence spectrometry mapping 3D laser and structured light scanning for 3D spatial capture photogrammetry/structure from motion, focus-stacking. ![]() The coins raise questions concerning their provenance, authenticity, design, purpose of issue and historic usage, but they also pose considerable recording challenges due to their material and surface properties, which are the main focus in this paper. Two ancient Roman silver denarii were selected as test objects to establish whether the proposed digital recording methods can support professional numismatic comparison of features and properties. ![]() This case study is applying imaging and analytical techniques from multiple scientific disciplines to digitise coins and evaluate 3D multi-modal visualisation. ![]()
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