We present a convolutional neural network (CNN) based solution for
\nmodeling physically plausible spatially varying surface
\nreflectance functions (SVBRDF) from a single photograph of a
\nplanar material sample under unknown natural
\nillumination. Gathering a sufficiently large set of labeled
\ntraining pairs consisting of photographs of SVBRDF samples and
\ncorresponding reflectance parameters, is a difficult and arduous
\nprocess. To reduce the amount of required labeled training data,
\nwe propose to leverage the appearance information embedded in
\nunlabeled images of spatially varying materials to self-augment
\nthe training process. Starting from a coarse network obtained from
\na small set of labeled training pairs, we estimate provisional
\nmodel parameters for each unlabeled training exemplar. Given this
\nprovisional reflectance estimate, we then synthesize a novel
\ntemporary labeled training pair by rendering the exact
\ncorresponding image under a new lighting condition. After refining
\nthe network using these additional training samples, we
\nre-estimate the provisional model parameters for the unlabeled
\ndata and repeat the self-augmentation process until convergence.
\nWe demonstrate the efficacy of the proposed network structure on
\nspatially varying wood, metal, and plastics, as well as thoroughly
\nvalidate the effectiveness of the self-augmentation training
\nprocess.<\/p>\n","protected":false},"excerpt":{"rendered":"
We present a convolutional neural network (CNN) based solution for modeling physically plausible spatially varying surface reflectance functions (SVBRDF) from a single photograph of a planar material sample under unknown natural illumination. Gathering a sufficiently large set of labeled training pairs consisting of photographs of SVBRDF samples and corresponding reflectance parameters, is a difficult and […]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"msr-url-field":"","msr-podcast-episode":"","msrModifiedDate":"","msrModifiedDateEnabled":false,"ep_exclude_from_search":false,"_classifai_error":"","msr-author-ordering":null,"msr_publishername":"ACM","msr_publisher_other":"","msr_booktitle":"","msr_chapter":"","msr_edition":"ACM Transactions on Graphics","msr_editors":"","msr_how_published":"","msr_isbn":"","msr_issue":"","msr_journal":"ACM Transactions on 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