Contents Course Notes : 1 . Notes on Basic Radiometry and BRDF Models

A new general reflectance model for computer graphics is presented.The model is based on physical optics and describes specular, di-rectional diffuse, and uniform diffuse reflection by a surface. Thereflected light pattern depends on wavelength, incidence angle, twosurface roughness parameters. and surface refractive index. The for-mulation is self consistent in terms of polarization, surface rough-ness, maskin@hadowing, and energy. The model applies to a widerange of materials and surface finishes and provides a smooth tran-sition from diffuse-like to specular reflection as the wavelength andincidence angle are increased or the surface roughness is decreased.The model is analytic and suitable for Computer Graphics appli-cations. Predicted reflectance distributions compare favorably withexperiment. The model is applied to metallic, nonmetallic, and plas-tic materials, with smooth and rough surfaces. CR