Image-based bidirectional reflectance distribution function measurement.

Applied Optics-OT, 39(16):2592--2600, June 2000.

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.

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