Send to:

Choose Destination
See comment in PubMed Commons below
Appl Opt. 2009 Oct 20;48(30):5793-801. doi: 10.1364/AO.48.005793.

Photometric model of diffuse surfaces described as a distribution of interfaced Lambertian facets.

Author information

  • 1PHYMAT (Laboratoire de Physique des Matériaux) UMR 6630, Université de Poitiers, Boulevard Marie et Pierre Curie, SP2MI-Téléport 2-BP 30179, F-86962, Futuroscope Chasseneuil Cedex, France.


The Lambertian model for diffuse reflection is widely used for the sake of its simplicity. Nevertheless, this model is known to be inaccurate in describing a lot of real-world objects, including those that present a matte surface. To overcome this difficulty, we propose a photometric model where the surfaces are described as a distribution of facets where each facet consists of a flat interface on a Lambertian background. Compared to the Lambertian model, it includes two additional physical parameters: an interface roughness parameter and the ratio between the refractive indices of the background binder and of the upper medium. The Torrance-Sparrow model--distribution of strictly specular facets--and the Oren-Nayar model--distribution of strictly Lambertian facets--appear as special cases.

PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Optical Society of America
    Loading ...
    Write to the Help Desk