Reflectance and Shape Estimation for Cartoon Shaded Objects

Todo, Hideki; Yamaguchi, Yasushi

Reflectance and Shape Estimation for Cartoon Shaded Objects

Files

027-032.pdf (2.88 MB)

pg_material_fin.zip (19.65 MB)

Date

2016

Authors

Todo, Hideki
Yamaguchi, Yasushi

Publisher

The Eurographics Association

Abstract

Although many photorealistic relighting methods provide a way to change the illumination of objects in a digital photograph, it is currently difficult to relight a cartoon shading style in digital illustrations. The main difference between photorealistic and cartoon shading styles is that cartoon shading is characterized by soft color quantization and nonlinear color variations that cause noticeable reconstruction errors under a physical reflectance assumption such as Lambertian. To handle this nonphotorealistic shading property, we focus on the shading analysis of the most fundamental cartoon shading technique. Based on its color map shading representation, we propose a simple method to decompose the input shading to a smooth shape with a nonlinear reflectance property. We have conducted simple ground-truth evaluations to compare our results to those obtained by other approaches.

        @inproceedings{10.2312:pg.20161331
,
booktitle = {Pacific Graphics Short Papers
},
editor = {Eitan Grinspun and Bernd Bickel and Yoshinori Dobashi
},
title = {{Reflectance and Shape Estimation for Cartoon Shaded Objects
}},
author = {Todo, Hideki and 
Yamaguchi, Yasushi
},
year = {2016
},
publisher = {The Eurographics Association
},
ISSN = {-
},
ISBN = {978-3-03868-024-6
},
DOI = {10.2312/pg.20161331
}
}