Applied Optics, vol. 39, no. 16 (2000).
The paper describes the first incarnation of our image-based BRDF measurement system. It is closely related to Chapter 5 of my thesis, which discusses the same topic.
We present a new image-based process for measuring a surface's bidirectional reflectance distribution rapidly, completely, and accurately. Requiring only two cameras, a light source, and a test sample of known shape, our method generates densely spaced samples covering a very large domain of illumination and reflection directions. We have verified our measurements both by tests of internal consistency and by comparison against measurements made using a gonioreflectometer. The resulting data show accuracy rivaling that of custom-built dedicated instruments.