Diffuse and Specular Reflectance from Rough Surfaces
- 1 January 1998
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 37 (1), 130-139
- https://doi.org/10.1364/ao.37.000130
Abstract
We present a reflection model for isotropic rough surfaces that have both specular and diffuse components. The surface is assumed to have a normal distribution of heights. Parameters of the model are the surface roughness given by the rms slope, the albedo, and the balance between diffuse and specular reflection. The effect of roughness on diffuse reflection is taken into account, instead of our modeling this component as a constant Lambertian term. The model includes geometrical effects such as masking and shadowing. The model is compared with experimental data obtained from goniophotometric measurements on samples of tiles and bricks. The model fits well to samples with very different reflection properties. Measurements of the sample profiles performed with a laser profilometer to determine the rms slope show that the assumed surface model is realistic. The model could therefore be used in machine vision and computer graphics to approximate reflection characteristics of surfaces. It could also be used to predict the texture of surfaces as a function of illumination and viewing angles.Keywords
This publication has 19 references indexed in Scilit:
- Generalization of the Lambertian model and implications for machine visionInternational Journal of Computer Vision, 1995
- A comprehensive physical model for light reflectionACM SIGGRAPH Computer Graphics, 1991
- Surface reflection: physical and geometrical perspectivesIeee Transactions On Pattern Analysis and Machine Intelligence, 1991
- Analysis and prediction of laser scattering from rough-surface materialsJournal of the Optical Society of America, 1979
- Shadow-corrected electromagnetic scattering from a randomly rough surfaceIEEE Transactions on Antennas and Propagation, 1969
- Rough Surface Scattering Based on the Specular Point TheoryIEEE Transactions on Antennas and Propagation, 1968
- Theory for Off-Specular Reflection From Roughened Surfaces*Journal of the Optical Society of America, 1967
- Geometrical shadowing of a random rough surfaceIEEE Transactions on Antennas and Propagation, 1967
- Shadowing of random rough surfacesIEEE Transactions on Antennas and Propagation, 1965
- Reflection and Refraction at a Random Moving Surface II Number of Specular Points in a Gaussian SurfaceJournal of the Optical Society of America, 1960