Objective and Subjective Evaluation of Virtual Relighting from Reflectance Transformation Imaging Data

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dc.contributor.authorPintus, Ruggeroen_US
dc.contributor.authorDulecha, Tinsaeen_US
dc.contributor.authorJaspe, Albertoen_US
dc.contributor.authorGiachetti, Andreaen_US
dc.contributor.authorCiortan, Irinaen_US
dc.contributor.authorGobbetti, Enricoen_US
dc.contributor.editorSablatnig, Robert and Wimmer, Michaelen_US
dc.date.accessioned2018-11-11T10:57:27Z
dc.date.available2018-11-11T10:57:27Z
dc.date.issued2018
dc.description.abstractReflectance Transformation Imaging (RTI) is widely used to produce relightable models from multi-light image collections. These models are used for a variety of tasks in the Cultural Heritage field. In this work, we carry out an objective and subjective evaluation of RTI data visualization. We start from the acquisition of a series of objects with different geometry and appearance characteristics using a common dome-based configuration. We then transform the acquired data into relightable representations using different approaches: PTM, HSH, and RBF. We then perform an objective error estimation by comparing ground truth images with relighted ones in a leave-one-out framework using PSNR and SSIM error metrics. Moreover, we carry out a subjective investigation through perceptual experiments involving end users with a variety of backgrounds. Objective and subjective tests are shown to behave consistently, and significant differences are found between the various methods. While the proposed analysis has been performed on three common and state-of-the-art RTI visualization methods, our approach is general enough to be extended and applied in the future to new developed multi-light processing pipelines and rendering solutions, to assess their numerical precision and accuracy, and their perceptual visual quality.en_US
dc.description.sectionheaders3D Reconstruction for CH
dc.description.seriesinformationEurographics Workshop on Graphics and Cultural Heritage
dc.identifier.doi10.2312/gch.20181344
dc.identifier.isbn978-3-03868-057-4
dc.identifier.issn2312-6124
dc.identifier.pages87-96
dc.identifier.urihttps://doi.org/10.2312/gch.20181344
dc.identifier.urihttps://diglib.eg.org:443/handle/10.2312/gch20181344
dc.publisherThe Eurographics Associationen_US
dc.subjectHuman
dc.subjectcentered computing
dc.subjectEmpirical studies in visualization
dc.subjectComputing methodologies
dc.subjectVisual inspection
dc.subjectImage representations
dc.titleObjective and Subjective Evaluation of Virtual Relighting from Reflectance Transformation Imaging Dataen_US
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GCH 2018 - Eurographics Workshop on Graphics and Cultural Heritage