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*

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Abstrakt

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.

OriginalsprogEngelsk
TidsskriftApplied Optics
Vol/bind59
Udgave nummer31
Sider (fra-til)9786-9798
ISSN1559-128X
DOI
StatusUdgivet - 1. nov. 2020

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