An Illumination Model for a System of Isotropic Substrate- Isotropic Thin Film with Identical Rough Boundaries
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Date
1999
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association
Abstract
A new physically-based illumination model describing the interaction of light with a system composed of an isotropic substrate coated by an isotropic film with geometrically identical statistical rough boundaries (ITF) is presented. This model divides the intensity reflected from the system into three components: specular, directional-diffuse and uniform diffuse intensity. The formulas for the intensity reflected coherently (specular) and incoherently (directionaldiffuse) from the system are derived within the framework of the scalar diffraction theory. Assuming that the slopes on the boundaries of the film are small, a first-order expansion of the reflection coefficient is used in the evaluation of the Helmholtz-Kirchhoff integral which allows to calculate the previous intensities. The consistency of the model is evaluated numerically and appraised visually by comparison with classic approximations.
Description
@inproceedings{10.2312:EGWR/EGWR99/261-272,
booktitle = {Eurographics Workshop on Rendering},
editor = {Dani Lischinski and Greg Ward Larson},
title = {{An Illumination Model for a System of Isotropic Substrate- Isotropic Thin Film with Identical Rough Boundaries}},
author = {Icart, Isabelle and Arqués, Didier},
year = {1999},
publisher = {The Eurographics Association},
ISSN = {1727-3463},
ISBN = {3-211-83382-X},
DOI = {10.2312/EGWR/EGWR99/261-272}
}