Accurate Soil and Mudbrick BRDF Models for Archaeological Illumination Rendering with Application to Small Finds

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dc.contributor.authorBadler, Virginiaen_US
dc.contributor.authorJr., Joseph Kideren_US
dc.contributor.authorMoore, Meganen_US
dc.contributor.authorWalter, B.en_US
dc.contributor.authorBadler, Normanen_US
dc.contributor.editorTobias Schreck and Tim Weyrich and Robert Sablatnig and Benjamin Stularen_US
dc.date.accessioned2017-09-27T06:39:17Z
dc.date.available2017-09-27T06:39:17Z
dc.date.issued2017
dc.description.abstractThe prevalence of mudbrick structures in the ancient world presents an unexplored opportunity for the realistic portrayal of their appearance. 3D computer models are often constructed from architectural remains to study form and function essential to understanding ancient cultures. These 3D models are usually rendered with estimated colors or photographic images for texture and color reference. Unfortunately, the reflectance properties of soil and mudbrick materials are not well captured in single view photographs. We obtained soil and mudbrick samples from a 1973 excavation of Godin Tepe in Iran and performed a Bi-Directional Reflectance Function (BRDF) capture and analysis on the mudbrick, and both wet and dry soil samples. The resulting BRDFs are used to render the soil and mudbrick interior architecture of the Godin Tepe site. We did illumination studies based on direct sunlight, skydome, and annualized sky irradiance. In a case study we test the archaeological hypothesis that small finds may be found in poorly illuminated portions of enclosed rooms. The accurate sky dome, BRDF surface appearance, and global illumination models are used to assess the applicability and validity of this concept.en_US
dc.description.sectionheadersAcquisition and Analysis
dc.description.seriesinformationEurographics Workshop on Graphics and Cultural Heritage
dc.identifier.doi10.2312/gch.20171289
dc.identifier.isbn978-3-03868-037-6
dc.identifier.issn2312-6124
dc.identifier.pages29-36
dc.identifier.urihttps://doi.org/10.2312/gch.20171289
dc.identifier.urihttps://diglib.eg.org:443/handle/10.2312/gch20171289
dc.publisherThe Eurographics Associationen_US
dc.titleAccurate Soil and Mudbrick BRDF Models for Archaeological Illumination Rendering with Application to Small Findsen_US
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GCH 2017 - Eurographics Workshop on Graphics and Cultural Heritage