March 22, 2024 Video/Audio Open Access

Olbrich, Stephan

Citation Style Language JSON Export

{"DOI":"10.25592/uhhfdm.14465","abstract":"<p>In this video animation we visualize the reconstruction of an enclosed cuneiform tablet (Louvre Museum, collection no. AO8295, 19th century BC, showing a loan contract, 5.9 cm x 6.1 cm x 2.1 cm) and the envelope. The surface reconstruction, feature analysis, segmentation, and visualization was performed by &quot;EXAVIS42&quot; - which was developed by the author, as part of the project - from high-resolution volume data (38 &micro;m voxel size), acquired by the portable micro-CT scanner &quot;ENCI&quot; - constructed as part of the project - at the collection of the Louvre Museum (Paris). The cuneiform signs are emphasized by a diffuse lighting model, combined with curvature-oriented highlighting and darkening, and shadowing by precalculated ambient occlusion, implementing an optimized function for weighting orientations of rays and their distances of crossed surfaces. The video clip was exported from &quot;EXAVIS42&quot; as a sequence of 4.850 anti-aliased images in 1920x1080 resolution (50 frames per second), off-screen rendered in OpenGL, by taking advantage of key frame animation, interpolating camera positions and orientations, as well as numerous visualization parameters.</p>","author":[{"family":"Olbrich, Stephan"}],"id":"14465","issued":{"date-parts":[[2024,3,22]]},"note":"The project \"Reading Closed Cuneiform Tablets Using High-Resolution Computed Tomography\" (RFA09) was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Initiative - EXC 2176 \"Understanding Written Artefacts: Material, Interaction, and Transmission in Manuscript Cultures\", project no. 390893796. The research was conducted within the scope of the Centre for the Study of Manuscript Cultures (CSMC) at Universit\u00e4t Hamburg.\n\nThis video animation was first published as part of the report about the project in German television: \"Forscher entschl\u00fcsseln die Geheimnisse antiker Keilschriften\", Norddeutscher Rundfunk (NDR), 22.03.2024, https://www.ardmediathek.de/video/hamburg-journal/forscher-entschluesseln-die-geheimnisse-antiker-keilschriften/ndr/Y3JpZDovL25kci5kZS9hMzdiYjQ1YS1iYmMxLTQ5NGUtOTk1Yi0wM2NmYzNlYzlhNjQ (attached 25.06.2024, available until 22.03.2026).\n\nData will be published separately.","title":"Non-invasive, virtual unpacking of enclosed cuneiform - 3D reconstruction and visualization of clay  tablets based on data acquired by portable micro-CT scanner","type":"motion_picture"}