In Proceedings of 10th Eurographics Workshop on Rendering, pages 139-152. Held in Granada, Spain, June 1999.
This paper grew out of a chapter of my thesis. The paper describes the second iteration of our image-based BRDF measurement system, which uses a slightly different setup, as well as a different camera, than the system described in the thesis and in the related Applied Optics paper.
We present a new image-based process for measuring the bidirectional reflectance of homogeneous surfaces rapidly, completely, and accurately. For simple sample shapes (spheres and cylinders) the method requires only a digital camera and a stable light source. Adding a 3D scanner allows a wide class of curved near-convex objects to be measured. With measurements for a variety of materials from paints to human skin, we demonstrate the new method's ability to achieve high resolution and accuracy over a large domain of illumination and reflection directions. We verify our measurements by tests of internal consistency and by comparison against measurements made using a gonioreflectometer.
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