Alignment of rendered images with photographs for testing appearance models

Morten Hannemose, Mads Emil Brix Doest, Andrea Luongo, Søren Kimmer Schou Gregersen, Jakob Wilm, Jeppe Revall Frisvad*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We propose a method for direct comparison of rendered images with a corresponding photograph in order to analyze the optical properties of physical objects and test the appropriateness of appearance models. To this end, we provide a practical method for aligning a known object and a point-like light source with the configuration observed in a photograph. Our method is based on projective transformation of object edges and silhouette matching in the image plane. To improve the similarity between rendered and photographed objects, we introduce models for spatially varying roughness and a model where the distribution of light transmitted by a rough surface influences direction-dependent subsurface scattering. Our goal is to support development toward progressive refinement of appearance models through quantitative validation.

Original languageEnglish
JournalApplied Optics
Volume59
Issue number31
Pages (from-to)9786-9798
ISSN1559-128X
DOIs
Publication statusPublished - 1 Nov 2020

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